From ec7e42145230d8792a895b1831f8861a802dc620 Mon Sep 17 00:00:00 2001
From: Bhargav Dabhade <bhargava2005dabhade@gmail.com>
Date: Mon, 12 Jan 2026 22:27:42 +0000
Subject: [PATCH 1/3] feat: implementation of stdev halfnormal distribution

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: passed
  - task: lint_package_json
    status: passed
  - task: lint_repl_help
    status: passed
  - task: lint_javascript_src
    status: passed
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: passed
  - task: lint_javascript_tests
    status: passed
  - task: lint_javascript_benchmarks
    status: passed
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: missing_dependencies
  - task: lint_c_examples
    status: missing_dependencies
  - task: lint_c_benchmarks
    status: missing_dependencies
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: passed
  - task: lint_license_headers
    status: passed
---
---
 .../base/dists/halfnormal/stdev/README.md     | 229 ++++++++++++++++++
 .../halfnormal/stdev/benchmark/benchmark.js   |  60 +++++
 .../stdev/benchmark/benchmark.native.js       |  69 ++++++
 .../halfnormal/stdev/benchmark/c/Makefile     | 146 +++++++++++
 .../halfnormal/stdev/benchmark/c/benchmark.c  | 140 +++++++++++
 .../base/dists/halfnormal/stdev/binding.gyp   | 171 +++++++++++++
 .../base/dists/halfnormal/stdev/docs/repl.txt |  26 ++
 .../halfnormal/stdev/docs/types/index.d.ts    |  52 ++++
 .../dists/halfnormal/stdev/docs/types/test.ts |  43 ++++
 .../halfnormal/stdev/examples/c/Makefile      | 146 +++++++++++
 .../halfnormal/stdev/examples/c/example.c     |  38 +++
 .../dists/halfnormal/stdev/examples/index.js  |  30 +++
 .../base/dists/halfnormal/stdev/include.gypi  |  54 +++++
 .../stats/base/dists/halfnormal/stdev.h       |  38 +++
 .../base/dists/halfnormal/stdev/lib/index.js  |  43 ++++
 .../base/dists/halfnormal/stdev/lib/main.js   |  67 +++++
 .../base/dists/halfnormal/stdev/lib/native.js |  58 +++++
 .../base/dists/halfnormal/stdev/manifest.json |  78 ++++++
 .../base/dists/halfnormal/stdev/package.json  |  72 ++++++
 .../base/dists/halfnormal/stdev/src/Makefile  |  70 ++++++
 .../base/dists/halfnormal/stdev/src/addon.c   |  22 ++
 .../base/dists/halfnormal/stdev/src/main.c    |  44 ++++
 .../stdev/test/fixtures/julia/REQUIRE         |   3 +
 .../stdev/test/fixtures/julia/data.json       |  32 +++
 .../stdev/test/fixtures/julia/runner.jl       |  69 ++++++
 .../base/dists/halfnormal/stdev/test/test.js  |  83 +++++++
 .../halfnormal/stdev/test/test.native.js      |  92 +++++++
 27 files changed, 1975 insertions(+)
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/README.md
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.js
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.native.js
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/Makefile
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/benchmark.c
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/binding.gyp
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/repl.txt
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/index.d.ts
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/test.ts
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/Makefile
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/example.c
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/index.js
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include.gypi
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include/stdlib/stats/base/dists/halfnormal/stdev.h
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/index.js
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/main.js
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/native.js
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/manifest.json
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/package.json
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/Makefile
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/addon.c
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/main.c
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/REQUIRE
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/data.json
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/runner.jl
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.js
 create mode 100755 lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.native.js

diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/README.md b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/README.md
new file mode 100755
index 000000000000..503708cc69be
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/README.md
@@ -0,0 +1,229 @@
+<!--
+
+@license Apache-2.0
+
+Copyright (c) 2018 The Stdlib Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+-->
+
+# Standard Deviation
+
+> [Half-normal][half-normal-distribution] distribution [standard deviation][standard-deviation].
+
+<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
+
+<section class="intro">
+
+The [standard deviation][standard-deviation] for a [half-normal][half-normal-distribution] random variable is
+
+<!-- <equation class="equation" label="eq:half-normal_stdev" align="center" raw="\sigma\sqrt{1-\frac{2}{\pi}}" alt="Standard deviation for a half-normal distribution."> -->
+
+```math
+\sigma\sqrt{1-\frac{2}{\pi}}
+```
+
+<!-- </equation> -->
+
+where `σ > 0` is the scale parameter.
+
+</section>
+
+<!-- /.intro -->
+
+<!-- Package usage documentation. -->
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var stdev = require( '@stdlib/stats/base/dists/halfnormal/stdev' );
+```
+
+#### stdev( sigma )
+
+Returns the [standard deviation][standard-deviation] of a [half-normal][half-normal-distribution] distribution with scale `sigma`.
+
+```javascript
+var y = stdev( 9.0 );
+// returns 5.425292474901783
+
+y = stdev( 3.5 );
+// returns 2.109835962461804
+```
+
+If provided `sigma < 0`, the function returns `NaN`.
+
+```javascript
+var y = stdev( -1.0 );
+// returns NaN
+```
+
+</section>
+
+<!-- /.usage -->
+
+<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+</section>
+
+<!-- /.notes -->
+
+<!-- Package usage examples. -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var uniform = require( '@stdlib/random/array/uniform' );
+var logEachMap = require( '@stdlib/console/log-each-map' );
+var stdev = require( '@stdlib/stats/base/dists/halfnormal/stdev' );
+
+var opts = {
+    'dtype': 'float64'
+};
+var sigma = uniform( 10, 0.1, 20.0, opts );
+
+logEachMap( 'σ: %0.4f, SD(X;σ): %0.4f', sigma, stdev );
+```
+
+</section>
+
+<!-- /.examples -->
+
+<!-- C interface documentation. -->
+
+* * *
+
+<section class="c">
+
+## C APIs
+
+<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
+
+<section class="intro">
+
+</section>
+
+<!-- /.intro -->
+
+<!-- C usage documentation. -->
+
+<section class="usage">
+
+### Usage
+
+```c
+#include "stdlib/stats/base/dists/halfnormal/stdev.h"
+```
+
+### stdlib_base_dists_halfnormal_stdev( sigma )
+
+Returns the [standard deviation][standard-deviation] of a [half-normal][half-normal-distribution] distribution with scale `sigma`.
+
+```c
+double out = stdlib_base_dists_halfnormal_stdev( 9.0 ); 
+// returns 5.425292474901783
+```
+
+The function accepts the following arguments:
+
+-   **sigma**: `[in] double` scale parameter.
+
+```c
+double stdlib_base_dists_halfnormal_stdev( const double sigma );
+```
+
+</section>
+
+<!-- /.usage -->
+
+<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+</section>
+
+<!-- /.notes -->
+
+<!-- C API usage examples. -->
+
+<section class="examples">
+
+### Examples
+
+```c
+#include "stdlib/stats/base/dists/halfnormal/stdev.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+static double random_uniform( const double min, const double max ) {
+    double v = (double)rand() / ( (double)RAND_MAX + 1.0 );
+    return min + ( v*(max-min) );
+}
+
+int main( void ) {
+    double sigma;
+    double y;
+    int i;
+
+    for ( i = 0; i < 25; i++ ) {
+        sigma = random_uniform( 0.1, 20.0 );
+        y = stdlib_base_dists_halfnormal_stdev( sigma );
+        printf( "σ: %lf, SD(X;σ): %lf\n", sigma, y );
+    }
+}
+```
+
+</section>
+
+<!-- /.examples -->
+
+</section>
+
+<!-- /.c -->
+
+<!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="references">
+
+</section>
+
+<!-- /.references -->
+
+<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
+
+<section class="related">
+
+</section>
+
+<!-- /.related -->
+
+<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="links">
+
+[half-normal-distribution]: https://en.wikipedia.org/wiki/Half-normal_distribution
+
+[standard-deviation]: https://en.wikipedia.org/wiki/Standard_deviation
+
+</section>
+
+<!-- /.links -->
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.js
new file mode 100755
index 000000000000..5a652141f2e2
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.js
@@ -0,0 +1,60 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2018 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var Float64Array = require( '@stdlib/array/float64' );
+var uniform = require( '@stdlib/random/base/uniform' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+var pkg = require( './../package.json' ).name;
+var stdev = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+	var sigma;
+	var len;
+	var y;
+	var i;
+
+	len = 100;
+	sigma = new Float64Array( len );
+	for ( i = 0; i < len; i++ ) {
+		sigma[ i ] = uniform( EPS, 20.0 );
+	}
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		y = stdev( sigma[ i % len ] );
+		if ( isnan( y ) ) {
+			b.fail( 'should not return NaN' );
+		}
+	}
+	b.toc();
+
+	if ( isnan( y ) ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.native.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.native.js
new file mode 100755
index 000000000000..fb4d3e10dde9
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.native.js
@@ -0,0 +1,69 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var bench = require( '@stdlib/bench' );
+var Float64Array = require( '@stdlib/array/float64' );
+var uniform = require( '@stdlib/random/base/uniform' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+
+
+// VARIABLES //
+
+var stdev = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+	'skip': ( stdev instanceof Error )
+};
+
+
+// MAIN //
+
+bench( format( '%s::native', pkg ), opts, function benchmark(b) {
+	var sigma;
+	var len;
+	var y;
+	var i;
+
+	len = 100;
+	sigma = new Float64Array( len );
+	for ( i = 0; i < len; i++ ) {
+		sigma[ i ] = uniform( EPS, 20.0 );
+	}
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		y = stdev( sigma[ i % len ] );
+		if ( isnan( y ) ) {
+			b.fail( 'should not return NaN' );
+		}
+	}
+	b.toc();
+	if ( isnan( y ) ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/Makefile b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/Makefile
new file mode 100755
index 000000000000..a4bd7b38fd74
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/Makefile
@@ -0,0 +1,146 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2025 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+	QUIET := @
+else
+	QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+	OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+	OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+	OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+	OS := WINNT
+endif
+endif
+endif
+endif
+
+# Define the program used for compiling C source files:
+ifdef C_COMPILER
+	CC := $(C_COMPILER)
+else
+	CC := gcc
+endif
+
+# Define the command-line options when compiling C files:
+CFLAGS ?= \
+	-std=c99 \
+	-O3 \
+	-Wall \
+	-pedantic
+
+# Determine whether to generate position independent code ([1][1], [2][2]).
+#
+# [1]: https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#Code-Gen-Options
+# [2]: http://stackoverflow.com/questions/5311515/gcc-fpic-option
+ifeq ($(OS), WINNT)
+	fPIC ?=
+else
+	fPIC ?= -fPIC
+endif
+
+# List of includes (e.g., `-I /foo/bar -I /beep/boop/include`):
+INCLUDE ?=
+
+# List of source files:
+SOURCE_FILES ?=
+
+# List of libraries (e.g., `-lopenblas -lpthread`):
+LIBRARIES ?=
+
+# List of library paths (e.g., `-L /foo/bar -L /beep/boop`):
+LIBPATH ?=
+
+# List of C targets:
+c_targets := benchmark.out
+
+
+# RULES #
+
+#/
+# Compiles source files.
+#
+# @param {string} [C_COMPILER] - C compiler (e.g., `gcc`)
+# @param {string} [CFLAGS] - C compiler options
+# @param {(string|void)} [fPIC] - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} [INCLUDE] - list of includes (e.g., `-I /foo/bar -I /beep/boop/include`)
+# @param {string} [SOURCE_FILES] - list of source files
+# @param {string} [LIBPATH] - list of library paths (e.g., `-L /foo/bar -L /beep/boop`)
+# @param {string} [LIBRARIES] - list of libraries (e.g., `-lopenblas -lpthread`)
+#
+# @example
+# make
+#
+# @example
+# make all
+#/
+all: $(c_targets)
+
+.PHONY: all
+
+#/
+# Compiles C source files.
+#
+# @private
+# @param {string} CC - C compiler (e.g., `gcc`)
+# @param {string} CFLAGS - C compiler options
+# @param {(string|void)} fPIC - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} INCLUDE - list of includes (e.g., `-I /foo/bar`)
+# @param {string} SOURCE_FILES - list of source files
+# @param {string} LIBPATH - list of library paths (e.g., `-L /foo/bar`)
+# @param {string} LIBRARIES - list of libraries (e.g., `-lopenblas`)
+#/
+$(c_targets): %.out: %.c
+	$(QUIET) $(CC) $(CFLAGS) $(fPIC) $(INCLUDE) -o $@ $(SOURCE_FILES) $< $(LIBPATH) -lm $(LIBRARIES)
+
+#/
+# Runs compiled benchmarks.
+#
+# @example
+# make run
+#/
+run: $(c_targets)
+	$(QUIET) ./$<
+
+.PHONY: run
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean:
+	$(QUIET) -rm -f *.o *.out
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/benchmark.c b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/benchmark.c
new file mode 100755
index 000000000000..5074a7776cb6
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/benchmark.c
@@ -0,0 +1,140 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/stats/base/dists/halfnormal/stdev.h"
+#include "stdlib/constants/float64/eps.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <time.h>
+#include <sys/time.h>
+
+#define NAME "halfnormal-stdev"
+#define ITERATIONS 1000000
+#define REPEATS 3
+
+/**
+* Prints the TAP version.
+*/
+static void print_version( void ) {
+	printf( "TAP version 13\n" );
+}
+
+/**
+* Prints the TAP summary.
+*
+* @param total     total number of tests
+* @param passing   total number of passing tests
+*/
+static void print_summary( int total, int passing ) {
+	printf( "#\n" );
+	printf( "1..%d\n", total );
+	printf( "# total %d\n", total );
+	printf( "# pass  %d\n", passing );
+	printf( "#\n" );
+	printf( "# ok\n" );
+}
+
+/**
+* Prints benchmark results.
+*
+* @param elapsed   elapsed time in seconds
+*/
+static void print_results( double elapsed ) {
+	double rate = (double)ITERATIONS / elapsed;
+	printf( "  ---\n" );
+	printf( "  iterations: %d\n", ITERATIONS );
+	printf( "  elapsed: %0.9f\n", elapsed );
+	printf( "  rate: %0.9f\n", rate );
+	printf( "  ...\n" );
+}
+
+/**
+* Returns a clock time.
+*
+* @return clock time
+*/
+static double tic( void ) {
+	struct timeval now;
+	gettimeofday( &now, NULL );
+	return (double)now.tv_sec + (double)now.tv_usec / 1.0e6;
+}
+
+/**
+* Generates a random number on the interval [min,max).
+*
+* @param min    minimum value (inclusive)
+* @param max    maximum value (exclusive)
+* @return       random number
+*/
+static double random_uniform( const double min, const double max ) {
+	double v = (double)rand() / ( (double)RAND_MAX + 1.0 );
+	return min + ( v*(max-min) );
+}
+
+/**
+* Runs a benchmark.
+*
+* @return elapsed time in seconds
+*/
+static double benchmark( void ) {
+	double elapsed;
+	double sigma[ 100 ];
+	double y;
+	double t;
+	int i;
+
+	for ( i = 0; i < 100; i++ ) {
+		sigma[ i ] = random_uniform( STDLIB_CONSTANT_FLOAT64_EPS, 20.0 );
+	}
+
+	t = tic();
+	for ( i = 0; i < ITERATIONS; i++ ) {
+		y = stdlib_base_dists_halfnormal_stdev( sigma[ i%100 ] );
+		if ( y != y ) {
+			printf( "should not return NaN\n" );
+			break;
+		}
+	}
+	elapsed = tic() - t;
+
+	if ( y != y ) {
+		printf( "should not return NaN\n" );
+	}
+	return elapsed;
+}
+
+/**
+* Main execution sequence.
+*/
+int main( void ) {
+	double elapsed;
+	int i;
+
+	// Use the current time to seed the random number generator:
+	srand( time( NULL ) );
+
+	print_version();
+	for ( i = 0; i < REPEATS; i++ ) {
+		printf( "# c::%s\n", NAME );
+		elapsed = benchmark();
+		print_results( elapsed );
+		printf( "ok %d benchmark finished\n", i+1 );
+	}
+	print_summary( REPEATS, REPEATS );
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/binding.gyp b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/binding.gyp
new file mode 100755
index 000000000000..66a6f1915e48
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/binding.gyp
@@ -0,0 +1,171 @@
+# @license Apache-2.0
+#
+# Copyright (c) 2025 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A `.gyp` file for building a Node.js native add-on.
+#
+# [1]: https://gyp.gsrc.io/docs/InputFormatReference.md
+# [2]: https://gyp.gsrc.io/docs/UserDocumentation.md
+{
+  # List of files to include in this file:
+  'includes': [
+    './include.gypi',
+  ],
+
+  # Define variables to be used throughout the configuration for all targets:
+  'variables': {
+    # Target name should match the add-on export name:
+    'addon_target_name%': 'addon',
+
+    # Set variables based on the host OS:
+    'conditions': [
+      [
+        'OS=="win"',
+        {
+          # Define the object file suffix:
+          'obj': 'obj',
+        },
+        {
+          # Define the object file suffix:
+          'obj': 'o',
+        }
+      ], # end condition (OS=="win")
+    ], # end conditions
+  }, # end variables
+
+  # Define compile targets:
+  'targets': [
+
+    # Target to generate an add-on:
+    {
+      # The target name should match the add-on export name:
+      'target_name': '<(addon_target_name)',
+
+      # Define dependencies:
+      'dependencies': [],
+
+      # Define directories which contain relevant include headers:
+      'include_dirs': [
+        # Local include directory:
+        '<@(include_dirs)',
+      ],
+
+      # List of source files:
+      'sources': [
+        '<@(src_files)',
+      ],
+
+      # Settings which should be applied when a target's object files are used as linker input:
+      'link_settings': {
+        # Define libraries:
+        'libraries': [
+          '<@(libraries)',
+        ],
+
+        # Define library directories:
+        'library_dirs': [
+          '<@(library_dirs)',
+        ],
+      },
+
+      # C/C++ compiler flags:
+      'cflags': [
+        # Enable commonly used warning options:
+        '-Wall',
+
+        # Aggressive optimization:
+        '-O3',
+      ],
+
+      # C specific compiler flags:
+      'cflags_c': [
+        # Specify the C standard to which a program is expected to conform:
+        '-std=c99',
+      ],
+
+      # C++ specific compiler flags:
+      'cflags_cpp': [
+        # Specify the C++ standard to which a program is expected to conform:
+        '-std=c++11',
+      ],
+
+      # Linker flags:
+      'ldflags': [],
+
+      # Apply conditions based on the host OS:
+      'conditions': [
+        [
+          'OS=="mac"',
+          {
+            # Linker flags:
+            'ldflags': [
+              '-undefined dynamic_lookup',
+              '-Wl,-no-pie',
+              '-Wl,-search_paths_first',
+            ],
+          },
+        ], # end condition (OS=="mac")
+        [
+          'OS!="win"',
+          {
+            # C/C++ flags:
+            'cflags': [
+              # Generate platform-independent code:
+              '-fPIC',
+            ],
+          },
+        ], # end condition (OS!="win")
+      ], # end conditions
+    }, # end target <(addon_target_name)
+
+    # Target to copy a generated add-on to a standard location:
+    {
+      'target_name': 'copy_addon',
+
+      # Declare that the output of this target is not linked:
+      'type': 'none',
+
+      # Define dependencies:
+      'dependencies': [
+        # Require that the add-on be generated before building this target:
+        '<(addon_target_name)',
+      ],
+
+      # Define a list of actions:
+      'actions': [
+        {
+          'action_name': 'copy_addon',
+          'message': 'Copying addon...',
+
+          # Explicitly list the inputs in the command-line invocation below:
+          'inputs': [],
+
+          # Declare the expected outputs:
+          'outputs': [
+            '<(addon_output_dir)/<(addon_target_name).node',
+          ],
+
+          # Define the command-line invocation:
+          'action': [
+            'cp',
+            '<(PRODUCT_DIR)/<(addon_target_name).node',
+            '<(addon_output_dir)/<(addon_target_name).node',
+          ],
+        },
+      ], # end actions
+    }, # end target copy_addon
+  ], # end targets
+}
+
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/repl.txt b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/repl.txt
new file mode 100755
index 000000000000..7c3b6aa97b69
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/repl.txt
@@ -0,0 +1,26 @@
+{{alias}}( σ )
+    Returns the standard deviation of a half-normal distribution.
+
+    If provided `NaN` as any argument, the function returns `NaN`.
+
+    If provided `σ < 0`, the function returns `NaN`.
+
+    Parameters
+    ----------
+    σ: number
+        Scale parameter.
+
+    Returns
+    -------
+    out: number
+        Standard deviation.
+
+    Examples
+    --------
+    > var v = {{alias}}( 9.0 )
+    ~5.425292474901783
+    > v = {{alias}}( 2.0 )
+    ~1.2056205499781738
+
+    See Also
+    --------
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/index.d.ts b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/index.d.ts
new file mode 100755
index 000000000000..03942905fcea
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/index.d.ts
@@ -0,0 +1,52 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+// TypeScript Version: 4.1
+
+/**
+* Returns the standard deviation of a half-normal distribution.
+*
+* ## Notes
+*
+* -   If provided `σ < 0`, the function returns `NaN`.
+*
+* @param sigma - scale parameter
+* @returns standard deviation
+*
+* @example
+* var v = stdev( 9.0 );
+* // returns ~5.425292474901783
+*
+* @example
+* var v = stdev( 2.0 );
+* // returns ~1.2056205499781738
+*
+* @example
+* var v = stdev( -0.2 );
+* // returns NaN
+*
+* @example
+* var v = stdev( NaN );
+* // returns NaN
+*/
+declare function stdev( sigma: number ): number;
+
+
+// EXPORTS //
+
+export = stdev;
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/test.ts b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/test.ts
new file mode 100755
index 000000000000..b9eac6c3038f
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/test.ts
@@ -0,0 +1,43 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2019 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import stdev = require( './index' );
+
+// TESTS //
+
+// The function returns a number...
+{
+	stdev( 0.3 ); // $ExpectType number
+}
+
+// The compiler throws an error if the function is provided a value other than a number...
+{
+	stdev( true ); // $ExpectError
+	stdev( false ); // $ExpectError
+	stdev( null ); // $ExpectError
+	stdev( undefined ); // $ExpectError
+	stdev( '5' ); // $ExpectError
+	stdev( [] ); // $ExpectError
+	stdev( {} ); // $ExpectError
+	stdev( ( x: number ): number => x ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided insufficient arguments...
+{
+	stdev(); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/Makefile b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/Makefile
new file mode 100755
index 000000000000..25ced822f96a
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/Makefile
@@ -0,0 +1,146 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2025 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+	QUIET := @
+else
+	QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+	OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+	OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+	OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+	OS := WINNT
+endif
+endif
+endif
+endif
+
+# Define the program used for compiling C source files:
+ifdef C_COMPILER
+	CC := $(C_COMPILER)
+else
+	CC := gcc
+endif
+
+# Define the command-line options when compiling C files:
+CFLAGS ?= \
+	-std=c99 \
+	-O3 \
+	-Wall \
+	-pedantic
+
+# Determine whether to generate position independent code ([1][1], [2][2]).
+#
+# [1]: https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#Code-Gen-Options
+# [2]: http://stackoverflow.com/questions/5311515/gcc-fpic-option
+ifeq ($(OS), WINNT)
+	fPIC ?=
+else
+	fPIC ?= -fPIC
+endif
+
+# List of includes (e.g., `-I /foo/bar -I /beep/boop/include`):
+INCLUDE ?=
+
+# List of source files:
+SOURCE_FILES ?=
+
+# List of libraries (e.g., `-lopenblas -lpthread`):
+LIBRARIES ?=
+
+# List of library paths (e.g., `-L /foo/bar -L /beep/boop`):
+LIBPATH ?=
+
+# List of C targets:
+c_targets := example.out
+
+
+# RULES #
+
+#/
+# Compiles source files.
+#
+# @param {string} [C_COMPILER] - C compiler (e.g., `gcc`)
+# @param {string} [CFLAGS] - C compiler options
+# @param {(string|void)} [fPIC] - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} [INCLUDE] - list of includes (e.g., `-I /foo/bar -I /beep/boop/include`)
+# @param {string} [SOURCE_FILES] - list of source files
+# @param {string} [LIBPATH] - list of library paths (e.g., `-L /foo/bar -L /beep/boop`)
+# @param {string} [LIBRARIES] - list of libraries (e.g., `-lopenblas -lpthread`)
+#
+# @example
+# make
+#
+# @example
+# make all
+#/
+all: $(c_targets)
+
+.PHONY: all
+
+#/
+# Compiles C source files.
+#
+# @private
+# @param {string} CC - C compiler (e.g., `gcc`)
+# @param {string} CFLAGS - C compiler options
+# @param {(string|void)} fPIC - compiler flag determining whether to generate position independent code (e.g., `-fPIC`)
+# @param {string} INCLUDE - list of includes (e.g., `-I /foo/bar`)
+# @param {string} SOURCE_FILES - list of source files
+# @param {string} LIBPATH - list of library paths (e.g., `-L /foo/bar`)
+# @param {string} LIBRARIES - list of libraries (e.g., `-lopenblas`)
+#/
+$(c_targets): %.out: %.c
+	$(QUIET) $(CC) $(CFLAGS) $(fPIC) $(INCLUDE) -o $@ $(SOURCE_FILES) $< $(LIBPATH) -lm $(LIBRARIES)
+
+#/
+# Runs compiled examples.
+#
+# @example
+# make run
+#/
+run: $(c_targets)
+	$(QUIET) ./$<
+
+.PHONY: run
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean:
+	$(QUIET) -rm -f *.o *.out
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/example.c b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/example.c
new file mode 100755
index 000000000000..057b0843b33a
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/example.c
@@ -0,0 +1,38 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/stats/base/dists/halfnormal/stdev.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+static double random_uniform( const double min, const double max ) {
+	double v = (double)rand() / ( (double)RAND_MAX + 1.0 );
+	return min + ( v*(max-min) );
+}
+
+int main( void ) {
+	double sigma;
+	double y;
+	int i;
+
+	for ( i = 0; i < 25; i++ ) {
+		sigma = random_uniform( 0.1, 10.0 );
+		y = stdlib_base_dists_halfnormal_stdev( sigma );
+		printf( "σ: %lf, SD(X;σ): %lf\n", sigma, y );
+	}
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/index.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/index.js
new file mode 100755
index 000000000000..26e97af49560
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/index.js
@@ -0,0 +1,30 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2018 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+var uniform = require( '@stdlib/random/array/uniform' );
+var logEachMap = require( '@stdlib/console/log-each-map' );
+var stdev = require( './../lib' );
+
+var opts = {
+	'dtype': 'float64'
+};
+var sigma = uniform( 10, 0.0, 20.0, opts );
+
+logEachMap( 'σ: %0.4f, SD(X;σ): %0.4f', sigma, stdev );
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include.gypi b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include.gypi
new file mode 100755
index 000000000000..94eb21e280db
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include.gypi
@@ -0,0 +1,54 @@
+# @license Apache-2.0
+#
+# Copyright (c) 2025 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A GYP include file for building a Node.js native add-on.
+#
+# Main documentation:
+#
+# [1]: https://gyp.gsrc.io/docs/InputFormatReference.md
+# [2]: https://gyp.gsrc.io/docs/UserDocumentation.md
+{
+  # Define variables to be used throughout the configuration for all targets:
+  'variables': {
+    # Source directory:
+    'src_dir': './src',
+
+    # Include directories:
+    'include_dirs': [
+      '<!@(node -e "var arr = require(\'@stdlib/utils/library-manifest\')(\'./manifest.json\',{},{\'basedir\':process.cwd(),\'paths\':\'posix\'}).include; for ( var i = 0; i < arr.length; i++ ) { console.log( arr[ i ] ); }")',
+    ],
+
+    # Add-on destination directory:
+    'addon_output_dir': './src',
+
+    # Source files:
+    'src_files': [
+      '<(src_dir)/addon.c',
+      '<!@(node -e "var arr = require(\'@stdlib/utils/library-manifest\')(\'./manifest.json\',{},{\'basedir\':process.cwd(),\'paths\':\'posix\'}).src; for ( var i = 0; i < arr.length; i++ ) { console.log( arr[ i ] ); }")',
+    ],
+
+    # Library dependencies:
+    'libraries': [
+      '<!@(node -e "var arr = require(\'@stdlib/utils/library-manifest\')(\'./manifest.json\',{},{\'basedir\':process.cwd(),\'paths\':\'posix\'}).libraries; for ( var i = 0; i < arr.length; i++ ) { console.log( arr[ i ] ); }")',
+    ],
+
+    # Library directories:
+    'library_dirs': [
+      '<!@(node -e "var arr = require(\'@stdlib/utils/library-manifest\')(\'./manifest.json\',{},{\'basedir\':process.cwd(),\'paths\':\'posix\'}).libpath; for ( var i = 0; i < arr.length; i++ ) { console.log( arr[ i ] ); }")',
+    ],
+  }, # end variables
+}
+
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include/stdlib/stats/base/dists/halfnormal/stdev.h b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include/stdlib/stats/base/dists/halfnormal/stdev.h
new file mode 100755
index 000000000000..638852c050be
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include/stdlib/stats/base/dists/halfnormal/stdev.h
@@ -0,0 +1,38 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#ifndef STDLIB_STATS_BASE_DISTS_HALFNORMAL_STDEV_H
+#define STDLIB_STATS_BASE_DISTS_HALFNORMAL_STDEV_H
+
+/*
+* If C++, prevent name mangling so that the compiler emits a binary file having undecorated names, thus mirroring the behavior of a C compiler.
+*/
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+* Returns the standard deviation of a half-normal distribution.
+*/
+double stdlib_base_dists_halfnormal_stdev( const double sigma );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // !STDLIB_STATS_BASE_DISTS_HALFNORMAL_STDEV_H
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/index.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/index.js
new file mode 100755
index 000000000000..efdb74a72424
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/index.js
@@ -0,0 +1,43 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2018 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+/**
+* Half-normal distribution standard deviation.
+*
+* @module @stdlib/stats/base/dists/halfnormal/stdev
+*
+* @example
+* var stdev = require( '@stdlib/stats/base/dists/halfnormal/stdev' );
+*
+* var v = stdev( 11.0 );
+* // returns ~6.6309130248799555
+*
+* v = stdev( 4.5 );
+* // returns ~2.7126462374508913
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/main.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/main.js
new file mode 100755
index 000000000000..ce2b77a213b3
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/main.js
@@ -0,0 +1,67 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2018 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var sqrt = require( '@stdlib/math/base/special/sqrt' );
+var PI = require( '@stdlib/constants/float64/pi' );
+
+
+// VARIABLES //
+
+var SQRT1M2PI = sqrt( 1.0 - (2.0/PI) );
+
+
+// MAIN //
+
+/**
+* Returns the standard deviation of a half-normal distribution.
+*
+* @param {NonNegativeNumber} sigma - scale parameter
+* @returns {NonNegativeNumber} standard deviation
+*
+* @example
+* var v = stdev( 9.0 );
+* // returns ~5.425292474901783
+*
+* @example
+* var v = stdev( 2.0 );
+* // returns ~1.2056205499781738
+*
+* @example
+* var v = stdev( -0.2 );
+* // returns NaN
+*
+* @example
+* var v = stdev( NaN );
+* // returns NaN
+*/
+function stdev( sigma ) {
+	if ( isnan( sigma ) || sigma < 0 ) {
+		return NaN;
+	}
+	return sigma * SQRT1M2PI;
+}
+
+
+// EXPORTS //
+
+module.exports = stdev;
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/native.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/native.js
new file mode 100755
index 000000000000..a916479c810b
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/native.js
@@ -0,0 +1,58 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var addon = require( './../src/addon.node' );
+
+
+// MAIN //
+
+/**
+* Returns the standard deviation of a half-normal distribution.
+*
+* @private
+* @param {NonNegativeNumber} sigma - scale parameter
+* @returns {NonNegativeNumber} standard deviation
+*
+* @example
+* var v = stdev( 9.0 );
+* // returns ~5.425292474901783
+*
+* @example
+* var v = stdev( 2.0 );
+* // returns ~1.2056205499781738
+*
+* @example
+* var v = stdev( -0.2 );
+* // returns NaN
+*
+* @example
+* var v = stdev( NaN );
+* // returns NaN
+*/
+function stdev( sigma ) {
+	return addon( sigma );
+}
+
+
+// EXPORTS //
+
+module.exports = stdev;
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/manifest.json b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/manifest.json
new file mode 100755
index 000000000000..f1d065b49db6
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/manifest.json
@@ -0,0 +1,78 @@
+{
+  "options": {
+    "task": "build",
+    "wasm": false
+  },
+  "fields": [
+    {
+      "field": "src",
+      "resolve": true,
+      "relative": true
+    },
+    {
+      "field": "include",
+      "resolve": true,
+      "relative": true
+    },
+    {
+      "field": "libraries",
+      "resolve": false,
+      "relative": false
+    },
+    {
+      "field": "libpath",
+      "resolve": true,
+      "relative": false
+    }
+  ],
+  "confs": [
+    {
+      "task": "build",
+      "wasm": false,
+      "src": [
+        "./src/main.c"
+      ],
+      "include": [
+        "./include"
+      ],
+      "libraries": [],
+      "libpath": [],
+      "dependencies": [
+        "@stdlib/math/base/napi/unary",
+        "@stdlib/math/base/assert/is-nan"
+      ]
+    },
+    {
+      "task": "benchmark",
+      "wasm": false,
+      "src": [
+        "./src/main.c"
+      ],
+      "include": [
+        "./include"
+      ],
+      "libraries": [],
+      "libpath": [],
+      "dependencies": [
+        "@stdlib/math/base/assert/is-nan",
+        "@stdlib/constants/float64/eps"
+      ]
+    },
+    {
+      "task": "examples",
+      "wasm": false,
+      "src": [
+        "./src/main.c"
+      ],
+      "include": [
+        "./include"
+      ],
+      "libraries": [],
+      "libpath": [],
+      "dependencies": [
+        "@stdlib/math/base/assert/is-nan"
+      ]
+    }
+  ]
+}
+
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/package.json b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/package.json
new file mode 100755
index 000000000000..2a004100846e
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/package.json
@@ -0,0 +1,72 @@
+{
+  "name": "@stdlib/stats/base/dists/halfnormal/stdev",
+  "version": "0.0.0",
+  "description": "Half-normal distribution standard deviation.",
+  "license": "Apache-2.0",
+  "author": {
+    "name": "The Stdlib Authors",
+    "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+  },
+  "contributors": [
+    {
+      "name": "The Stdlib Authors",
+      "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+    }
+  ],
+  "main": "./lib",
+  "gypfile": true,
+  "directories": {
+    "benchmark": "./benchmark",
+    "doc": "./docs",
+    "example": "./examples",
+    "include": "./include",
+    "lib": "./lib",
+    "src": "./src",
+    "test": "./test"
+  },
+  "types": "./docs/types",
+  "scripts": {},
+  "homepage": "https://github.com/stdlib-js/stdlib",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/stdlib-js/stdlib.git"
+  },
+  "bugs": {
+    "url": "https://github.com/stdlib-js/stdlib/issues"
+  },
+  "dependencies": {},
+  "devDependencies": {},
+  "engines": {
+    "node": ">=0.10.0",
+    "npm": ">2.7.0"
+  },
+  "os": [
+    "aix",
+    "darwin",
+    "freebsd",
+    "linux",
+    "macos",
+    "openbsd",
+    "sunos",
+    "win32",
+    "windows"
+  ],
+  "keywords": [
+    "stdlib",
+    "stdmath",
+    "statistics",
+    "stats",
+    "distribution",
+    "dist",
+    "gaussian",
+    "halfnormal",
+    "continuous",
+    "standard",
+    "deviation",
+    "stdev",
+    "std",
+    "spread",
+    "dispersion",
+    "univariate"
+  ]
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/Makefile b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/Makefile
new file mode 100755
index 000000000000..bcf18aa46655
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/Makefile
@@ -0,0 +1,70 @@
+#/
+# @license Apache-2.0
+#
+# Copyright (c) 2024 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#/
+
+# VARIABLES #
+
+ifndef VERBOSE
+	QUIET := @
+else
+	QUIET :=
+endif
+
+# Determine the OS ([1][1], [2][2]).
+#
+# [1]: https://en.wikipedia.org/wiki/Uname#Examples
+# [2]: http://stackoverflow.com/a/27776822/2225624
+OS ?= $(shell uname)
+ifneq (, $(findstring MINGW,$(OS)))
+	OS := WINNT
+else
+ifneq (, $(findstring MSYS,$(OS)))
+	OS := WINNT
+else
+ifneq (, $(findstring CYGWIN,$(OS)))
+	OS := WINNT
+else
+ifneq (, $(findstring Windows_NT,$(OS)))
+	OS := WINNT
+endif
+endif
+endif
+endif
+
+
+# RULES #
+
+#/
+# Removes generated files for building an add-on.
+#
+# @example
+# make clean-addon
+#/
+clean-addon:
+	$(QUIET) -rm -f *.o *.node
+
+.PHONY: clean-addon
+
+#/
+# Removes generated files.
+#
+# @example
+# make clean
+#/
+clean: clean-addon
+
+.PHONY: clean
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/addon.c b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/addon.c
new file mode 100755
index 000000000000..e6fa39cf7072
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/addon.c
@@ -0,0 +1,22 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/stats/base/dists/halfnormal/stdev.h"
+#include "stdlib/math/base/napi/unary.h"
+
+STDLIB_MATH_BASE_NAPI_MODULE_D_D( stdlib_base_dists_halfnormal_stdev )
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/main.c b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/main.c
new file mode 100755
index 000000000000..49c5e1e0c9d6
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/main.c
@@ -0,0 +1,44 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+#include "stdlib/stats/base/dists/halfnormal/stdev.h"
+#include "stdlib/math/base/assert/is_nan.h"
+
+// sqrt(1 - 2/pi)
+static const double SQRT1M2PI = 0.6028102749890869;
+
+/**
+* Returns the standard deviation of a half-normal distribution.
+*
+* @param sigma   scale parameter
+* @return        standard deviation
+*
+* @example
+* double v = stdlib_base_dists_halfnormal_stdev( 2.0 );
+* // returns ~1.2056
+*/
+
+double stdlib_base_dists_halfnormal_stdev( const double sigma ) {
+	if (
+		stdlib_base_is_nan( sigma ) ||
+		sigma < 0.0
+	) {
+		return 0.0/0.0; // NaN
+	}
+	return sigma * SQRT1M2PI;
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/REQUIRE b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/REQUIRE
new file mode 100755
index 000000000000..98be20b58ed3
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/REQUIRE
@@ -0,0 +1,3 @@
+Distributions 0.23.8
+julia 1.5
+JSON 0.21
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/data.json b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/data.json
new file mode 100755
index 000000000000..9be09005cd80
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/data.json
@@ -0,0 +1,32 @@
+{
+  "sigma": [
+    18.85019126246455, 6.815489890726541, 2.4528028962506747, 5.52828434540982,
+    11.76480827117304, 12.216327775083297, 18.95871415268353, 8.437297087195631,
+    19.557257165385046, 11.362719384741425, 11.013395500405874, 16.951338263629626,
+    9.047073335857913, 2.577081059735365, 11.83717172838757, 14.785690111153304,
+    16.56933028428779, 20.952586004767657, 6.7358177234078624, 16.320670601385043,
+    5.82279301905089, 21.333430683837992, 10.500092704309195, 10.170477298914145,
+    17.24697141680967, 8.05342552516345, 12.44468319842698, 20.444669282818595,
+    9.899379365307912, 20.945698578359757, 10.09022316621611, 5.8542885467509524,
+    13.399915292407563, 18.870914589663215, 8.68669540352445, 20.746729831193605,
+    6.68085204116103, 12.262974326022668, 9.25157045118463, 20.189685268578533,
+    11.716974480444138, 5.362441952744555, 9.925273362418071, 12.96088212770181,
+    7.495070839707887, 10.643342368188186, 20.21575020229341, 21.76937424634205,
+    6.085479875231921, 7.970382058450792
+  ],
+  "expected": [
+    11.35497510023821, 4.10583126568284, 1.4779003251958494, 3.333221949353708,
+    7.088773262477726, 7.355669554194485, 11.42609080814232, 5.087109832982592,
+    11.790695489101993, 6.847086668632434, 6.635925759783627, 10.214361215672195,
+    5.455211135175438, 1.553027269095654, 7.12796262686377, 8.912061967246182,
+    9.98145605863649, 12.62421075803505, 4.058629641264735, 9.832611556608558,
+    3.508496201425737, 12.856398635925672, 6.326799699419043, 6.128152844663905,
+    10.391881317177527, 4.851928042269107, 7.502000368611268, 12.31418412830831,
+    5.960331045677686, 12.6150244881638, 6.081462081494754, 3.5266704729790727,
+    8.06750112137409, 11.364111788230616, 5.233489513658881, 12.504252267324534,
+    4.027133568556261, 7.398164462421301, 5.574734273650579, 12.163771223984932,
+    7.053054178719272, 3.227185409348649, 5.980968262062775, 7.80800213434707,
+    4.513711355364497, 6.411445272595768, 12.181366973896128, 13.12584114751963,
+    3.665090173457039, 4.798066988204434
+  ]
+}
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/runner.jl b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/runner.jl
new file mode 100755
index 000000000000..1b20af45116e
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/runner.jl
@@ -0,0 +1,69 @@
+#!/usr/bin/env julia
+#
+# @license Apache-2.0
+#
+# Copyright (c) 2018 The Stdlib Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import Distributions: var, HalfNormal
+import JSON
+
+"""
+	gen( sigma, name )
+
+Generate fixture data and write to file.
+
+# Arguments
+
+* `sigma`: scale parameter
+* `name::AbstractString`: output filename
+
+# Examples
+
+``` julia
+julia> sigma = rand( 1000 );
+julia> gen( sigma, \"data.json\" );
+```
+"""
+# Get the filename:
+file = @__FILE__
+
+# Extract the directory in which this file resides:
+dir = dirname(file)
+
+function gen( sigma, name )
+	z = Array{Float64}( undef, length(sigma) )
+	for i in eachindex(sigma)
+		z[i] = sqrt( var( HalfNormal( sigma[i] ) ) )
+	end
+	# Store data to be written to file as a collection:
+	data = Dict([
+		("sigma", sigma),
+		("expected", z)
+	]);
+
+	# Based on the script directory, create an output filepath:
+	filepath = joinpath(dir, name)
+
+	# Write the data to the output filepath as JSON:
+	open(filepath, "w") do outfile
+		write(outfile, JSON.json(data))
+		write(outfile, "\n")
+	end
+end
+
+# Generate fixtures:
+sigma = ( rand(50) .* 20.0 ) .+ 2.0
+gen(sigma, "data.json")
+
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.js
new file mode 100755
index 000000000000..c4c793a73441
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.js
@@ -0,0 +1,83 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var abs = require( '@stdlib/math/base/special/abs' );
+var NINF = require( '@stdlib/constants/float64/ninf' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+var stdev = require( './../lib' );
+
+
+// FIXTURES //
+
+var data = require( './fixtures/julia/data.json' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+	t.ok( true, __filename );
+	t.strictEqual( typeof stdev, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'if provided `NaN` for `sigma`, the function returns `NaN`', function test( t ) {
+	var sigma = stdev( NaN );
+	t.strictEqual( isnan( sigma ), true, 'returns expected value' );
+	t.end();
+});
+
+tape( 'if provided a scale `sigma` that is not a nonnegative number, the function returns `NaN`', function test( t ) {
+	var sigma;
+
+	sigma = stdev( -1.0 );
+	t.strictEqual( isnan( sigma ), true, 'returns expected value' );
+
+	sigma = stdev( NINF );
+	t.strictEqual( isnan( sigma ), true, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the function returns the standard deviation of a half-normal distribution', function test( t ) {
+	var expected;
+	var delta;
+	var sigma;
+	var tol;
+	var i;
+	var y;
+
+	expected = data.expected;
+	sigma = data.sigma;
+	for ( i = 0; i < expected.length; i++ ) {
+		y = stdev( sigma[i] );
+		if ( y === expected[i] ) {
+			t.strictEqual( y, expected[i], ', sigma: '+sigma[i]+', y: '+y+', expected: '+expected[i] );
+		} else {
+			delta = abs( y - expected[ i ] );
+			tol = 1.5 * EPS * abs( expected[ i ] );
+			t.ok( delta <= tol, 'within tolerance. sigma: '+sigma[i]+'. y: '+y+'. E: '+expected[ i ]+'. Δ: '+delta+'. tol: '+tol+'.' );
+		}
+	}
+	t.end();
+});
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.native.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.native.js
new file mode 100755
index 000000000000..97b489f84f72
--- /dev/null
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.native.js
@@ -0,0 +1,92 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var tape = require( 'tape' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+var abs = require( '@stdlib/math/base/special/abs' );
+var NINF = require( '@stdlib/constants/float64/ninf' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+
+
+// FIXTURES //
+
+var data = require( './fixtures/julia/data.json' );
+
+
+// VARIABLES //
+
+var stdev = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+	'skip': ( stdev instanceof Error )
+};
+
+
+// TESTS //
+
+tape( 'main export is a function', opts, function test( t ) {
+	t.ok( true, __filename );
+	t.strictEqual( typeof stdev, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'if provided `NaN` for `sigma`, the function returns `NaN`', opts, function test( t ) {
+	var sigma = stdev( NaN );
+	t.strictEqual( isnan( sigma ), true, 'returns expected value' );
+	t.end();
+});
+
+tape( 'if provided a scale `sigma` that is not a nonnegative number, the function returns `NaN`', opts, function test( t ) {
+	var sigma;
+
+	sigma = stdev( -1.0 );
+	t.strictEqual( isnan( sigma ), true, 'returns expected value' );
+
+	sigma = stdev( NINF );
+	t.strictEqual( isnan( sigma ), true, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the function returns the standard deviation of a half-normal distribution', opts, function test( t ) {
+	var expected;
+	var delta;
+	var sigma;
+	var tol;
+	var i;
+	var y;
+
+	expected = data.expected;
+	sigma = data.sigma;
+	for ( i = 0; i < expected.length; i++ ) {
+		y = stdev( sigma[i] );
+		if ( y === expected[i] ) {
+			t.strictEqual( y, expected[i], ', sigma: '+sigma[i]+', y: '+y+', expected: '+expected[i] );
+		} else {
+			delta = abs( y - expected[ i ] );
+			tol = 1.5 * EPS * abs( expected[ i ] );
+			t.ok( delta <= tol, 'within tolerance. sigma: '+sigma[i]+'. y: '+y+'. E: '+expected[ i ]+'. Δ: '+delta+'. tol: '+tol+'.' );
+		}
+	}
+	t.end();
+});

From 11b1d96510b7bc61e72205facc5ce8d74e4faaf3 Mon Sep 17 00:00:00 2001
From: Bhargav Dabhade <bhargava2005dabhade@gmail.com>
Date: Tue, 13 Jan 2026 19:45:15 +0000
Subject: [PATCH 2/3] fix: added requested changes

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: passed
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: passed
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: passed
  - task: lint_javascript_tests
    status: passed
  - task: lint_javascript_benchmarks
    status: passed
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: missing_dependencies
  - task: lint_c_examples
    status: missing_dependencies
  - task: lint_c_benchmarks
    status: missing_dependencies
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: passed
  - task: lint_license_headers
    status: passed
---
---
 .../base/dists/halfnormal/stdev/README.md     |  2 +-
 .../halfnormal/stdev/benchmark/benchmark.js   |  2 +-
 .../stdev/benchmark/benchmark.native.js       |  2 +-
 .../halfnormal/stdev/benchmark/c/Makefile     |  2 +-
 .../halfnormal/stdev/benchmark/c/benchmark.c  |  2 +-
 .../base/dists/halfnormal/stdev/binding.gyp   |  3 +--
 .../halfnormal/stdev/docs/types/index.d.ts    |  2 +-
 .../dists/halfnormal/stdev/docs/types/test.ts |  2 +-
 .../halfnormal/stdev/examples/c/Makefile      |  2 +-
 .../halfnormal/stdev/examples/c/example.c     |  2 +-
 .../dists/halfnormal/stdev/examples/index.js  |  4 +--
 .../base/dists/halfnormal/stdev/include.gypi  |  3 +--
 .../stats/base/dists/halfnormal/stdev.h       |  2 +-
 .../base/dists/halfnormal/stdev/lib/index.js  |  2 +-
 .../base/dists/halfnormal/stdev/lib/main.js   |  2 +-
 .../base/dists/halfnormal/stdev/lib/native.js |  2 +-
 .../base/dists/halfnormal/stdev/manifest.json |  1 -
 .../base/dists/halfnormal/stdev/src/Makefile  |  2 +-
 .../base/dists/halfnormal/stdev/src/addon.c   |  2 +-
 .../base/dists/halfnormal/stdev/src/main.c    |  2 +-
 .../stdev/test/fixtures/julia/data.json       | 26 +++++++++----------
 .../stdev/test/fixtures/julia/runner.jl       |  3 +--
 .../base/dists/halfnormal/stdev/test/test.js  |  2 +-
 .../halfnormal/stdev/test/test.native.js      |  2 +-
 24 files changed, 36 insertions(+), 40 deletions(-)

diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/README.md b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/README.md
index 503708cc69be..13e597f368ad 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/README.md
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/README.md
@@ -2,7 +2,7 @@
 
 @license Apache-2.0
 
-Copyright (c) 2018 The Stdlib Authors.
+Copyright (c) 2026 The Stdlib Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.js
index 5a652141f2e2..72191006b613 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.js
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2018 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.native.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.native.js
index fb4d3e10dde9..6f84331a1908 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.native.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/benchmark.native.js
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2025 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/Makefile b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/Makefile
index a4bd7b38fd74..979768abbcec 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/Makefile
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/Makefile
@@ -1,7 +1,7 @@
 #/
 # @license Apache-2.0
 #
-# Copyright (c) 2025 The Stdlib Authors.
+# Copyright (c) 2026 The Stdlib Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/benchmark.c b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/benchmark.c
index 5074a7776cb6..7c2e1b1250f3 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/benchmark.c
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/benchmark/c/benchmark.c
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2025 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/binding.gyp b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/binding.gyp
index 66a6f1915e48..0d6508a12e99 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/binding.gyp
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/binding.gyp
@@ -1,6 +1,6 @@
 # @license Apache-2.0
 #
-# Copyright (c) 2025 The Stdlib Authors.
+# Copyright (c) 2026 The Stdlib Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -168,4 +168,3 @@
     }, # end target copy_addon
   ], # end targets
 }
-
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/index.d.ts b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/index.d.ts
index 03942905fcea..ee2624cf7454 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/index.d.ts
@@ -1,7 +1,7 @@
 /*
 * @license Apache-2.0
 *
-* Copyright (c) 2025 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/test.ts b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/test.ts
index b9eac6c3038f..9303c1d781c6 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/test.ts
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/test.ts
@@ -1,7 +1,7 @@
 /*
 * @license Apache-2.0
 *
-* Copyright (c) 2019 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/Makefile b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/Makefile
index 25ced822f96a..c8f8e9a1517b 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/Makefile
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/Makefile
@@ -1,7 +1,7 @@
 #/
 # @license Apache-2.0
 #
-# Copyright (c) 2025 The Stdlib Authors.
+# Copyright (c) 2026 The Stdlib Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/example.c b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/example.c
index 057b0843b33a..8ca35915d7c8 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/example.c
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/c/example.c
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2025 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/index.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/index.js
index 26e97af49560..9f5c45333a19 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/index.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/examples/index.js
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2018 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -25,6 +25,6 @@ var stdev = require( './../lib' );
 var opts = {
 	'dtype': 'float64'
 };
-var sigma = uniform( 10, 0.0, 20.0, opts );
+var sigma = uniform( 10, 0.1, 20.0, opts );
 
 logEachMap( 'σ: %0.4f, SD(X;σ): %0.4f', sigma, stdev );
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include.gypi b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include.gypi
index 94eb21e280db..bee8d41a2caf 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include.gypi
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include.gypi
@@ -1,6 +1,6 @@
 # @license Apache-2.0
 #
-# Copyright (c) 2025 The Stdlib Authors.
+# Copyright (c) 2026 The Stdlib Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -51,4 +51,3 @@
     ],
   }, # end variables
 }
-
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include/stdlib/stats/base/dists/halfnormal/stdev.h b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include/stdlib/stats/base/dists/halfnormal/stdev.h
index 638852c050be..243f0f98f70a 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include/stdlib/stats/base/dists/halfnormal/stdev.h
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/include/stdlib/stats/base/dists/halfnormal/stdev.h
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2025 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/index.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/index.js
index efdb74a72424..a044105e7e48 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/index.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/index.js
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2018 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/main.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/main.js
index ce2b77a213b3..3161ea332560 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/main.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/main.js
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2018 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/native.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/native.js
index a916479c810b..141bdc13db05 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/native.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/native.js
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2025 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/manifest.json b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/manifest.json
index f1d065b49db6..2b010801d0ba 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/manifest.json
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/manifest.json
@@ -75,4 +75,3 @@
     }
   ]
 }
-
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/Makefile b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/Makefile
index bcf18aa46655..2caf905cedbe 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/Makefile
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/Makefile
@@ -1,7 +1,7 @@
 #/
 # @license Apache-2.0
 #
-# Copyright (c) 2024 The Stdlib Authors.
+# Copyright (c) 2026 The Stdlib Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/addon.c b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/addon.c
index e6fa39cf7072..25bad3505354 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/addon.c
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/addon.c
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2025 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/main.c b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/main.c
index 49c5e1e0c9d6..fc91577559c2 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/main.c
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/main.c
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2025 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/data.json b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/data.json
index 9be09005cd80..b6be035fce04 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/data.json
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/data.json
@@ -15,18 +15,18 @@
     6.085479875231921, 7.970382058450792
   ],
   "expected": [
-    11.35497510023821, 4.10583126568284, 1.4779003251958494, 3.333221949353708,
-    7.088773262477726, 7.355669554194485, 11.42609080814232, 5.087109832982592,
-    11.790695489101993, 6.847086668632434, 6.635925759783627, 10.214361215672195,
-    5.455211135175438, 1.553027269095654, 7.12796262686377, 8.912061967246182,
-    9.98145605863649, 12.62421075803505, 4.058629641264735, 9.832611556608558,
-    3.508496201425737, 12.856398635925672, 6.326799699419043, 6.128152844663905,
-    10.391881317177527, 4.851928042269107, 7.502000368611268, 12.31418412830831,
-    5.960331045677686, 12.6150244881638, 6.081462081494754, 3.5266704729790727,
-    8.06750112137409, 11.364111788230616, 5.233489513658881, 12.504252267324534,
-    4.027133568556261, 7.398164462421301, 5.574734273650579, 12.163771223984932,
-    7.053054178719272, 3.227185409348649, 5.980968262062775, 7.80800213434707,
-    4.513711355364497, 6.411445272595768, 12.181366973896128, 13.12584114751963,
-    3.665090173457039, 4.798066988204434
+    11.363088978523138, 4.108447335214208, 1.478574788382898, 3.332506606474358,
+    7.091947309139704, 7.364127905454782, 11.428507691818652, 5.086089377297021,
+    11.789315569898049, 6.849563996939807, 6.638987970163237, 10.218440880131606,
+    5.453668765434944, 1.553490942288243, 7.135568744682357, 8.912965921807746,
+    9.988162545056529, 12.630434131266485, 4.060420134123859, 9.838267933227224,
+    3.510039461018602, 12.860011216985004, 6.329563770495531, 6.130868217328701,
+    10.396651582495960, 4.854687655427910, 7.501782900995837, 12.324256712436815,
+    5.967447597422555, 12.626282319859572, 6.082490201527988, 3.529025288732404,
+    8.077606622246673, 11.375581213090454, 5.236429244945011, 12.506341914666109,
+    4.027286256093683, 7.392246925653837, 5.576941727759518, 12.170549728694942,
+    7.063112608596645, 3.232535108146961, 5.983056764941097, 7.812952919501070,
+    4.518105713946998, 6.415916139770520, 12.186261938555180, 13.122802475777798,
+    3.668389797029108, 4.804628200422807
   ]
 }
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/runner.jl b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/runner.jl
index 1b20af45116e..2dcb6faa7808 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/runner.jl
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/fixtures/julia/runner.jl
@@ -2,7 +2,7 @@
 #
 # @license Apache-2.0
 #
-# Copyright (c) 2018 The Stdlib Authors.
+# Copyright (c) 2026 The Stdlib Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -66,4 +66,3 @@ end
 # Generate fixtures:
 sigma = ( rand(50) .* 20.0 ) .+ 2.0
 gen(sigma, "data.json")
-
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.js
index c4c793a73441..6329a2cf8ffc 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.js
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2025 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.native.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.native.js
index 97b489f84f72..8c007622213b 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.native.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/test/test.native.js
@@ -1,7 +1,7 @@
 /**
 * @license Apache-2.0
 *
-* Copyright (c) 2025 The Stdlib Authors.
+* Copyright (c) 2026 The Stdlib Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.

From bbf8999d4d1c932f6901b31c27768d89187ce94e Mon Sep 17 00:00:00 2001
From: Philipp Burckhardt <pburckhardt@outlook.com>
Date: Wed, 14 Jan 2026 00:02:19 -0600
Subject: [PATCH 3/3] chore: minor clean-up

Signed-off-by: Philipp Burckhardt <pburckhardt@outlook.com>
---
 .../stats/base/dists/halfnormal/stdev/docs/types/test.ts      | 1 +
 .../@stdlib/stats/base/dists/halfnormal/stdev/lib/index.js    | 4 ++--
 .../@stdlib/stats/base/dists/halfnormal/stdev/lib/main.js     | 4 ++--
 .../@stdlib/stats/base/dists/halfnormal/stdev/lib/native.js   | 4 ++--
 .../@stdlib/stats/base/dists/halfnormal/stdev/src/main.c      | 4 +---
 5 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/test.ts b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/test.ts
index 9303c1d781c6..3ba2b7d34cbf 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/test.ts
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/docs/types/test.ts
@@ -18,6 +18,7 @@
 
 import stdev = require( './index' );
 
+
 // TESTS //
 
 // The function returns a number...
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/index.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/index.js
index a044105e7e48..05a61e4fef9b 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/index.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/index.js
@@ -27,10 +27,10 @@
 * var stdev = require( '@stdlib/stats/base/dists/halfnormal/stdev' );
 *
 * var v = stdev( 11.0 );
-* // returns ~6.6309130248799555
+* // returns ~6.631
 *
 * v = stdev( 4.5 );
-* // returns ~2.7126462374508913
+* // returns ~2.713
 */
 
 // MODULES //
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/main.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/main.js
index 3161ea332560..4131e85db2d5 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/main.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/main.js
@@ -40,11 +40,11 @@ var SQRT1M2PI = sqrt( 1.0 - (2.0/PI) );
 *
 * @example
 * var v = stdev( 9.0 );
-* // returns ~5.425292474901783
+* // returns ~5.425
 *
 * @example
 * var v = stdev( 2.0 );
-* // returns ~1.2056205499781738
+* // returns ~1.206
 *
 * @example
 * var v = stdev( -0.2 );
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/native.js b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/native.js
index 141bdc13db05..21662df3def7 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/native.js
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/lib/native.js
@@ -34,11 +34,11 @@ var addon = require( './../src/addon.node' );
 *
 * @example
 * var v = stdev( 9.0 );
-* // returns ~5.425292474901783
+* // returns ~5.425
 *
 * @example
 * var v = stdev( 2.0 );
-* // returns ~1.2056205499781738
+* // returns ~1.206
 *
 * @example
 * var v = stdev( -0.2 );
diff --git a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/main.c b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/main.c
index fc91577559c2..4b89a88f11e2 100755
--- a/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/main.c
+++ b/lib/node_modules/@stdlib/stats/base/dists/halfnormal/stdev/src/main.c
@@ -19,8 +19,7 @@
 #include "stdlib/stats/base/dists/halfnormal/stdev.h"
 #include "stdlib/math/base/assert/is_nan.h"
 
-// sqrt(1 - 2/pi)
-static const double SQRT1M2PI = 0.6028102749890869;
+static const double SQRT1M2PI = 0.6028102749890869; // sqrt(1 - 2/pi)
 
 /**
 * Returns the standard deviation of a half-normal distribution.
@@ -32,7 +31,6 @@ static const double SQRT1M2PI = 0.6028102749890869;
 * double v = stdlib_base_dists_halfnormal_stdev( 2.0 );
 * // returns ~1.2056
 */
-
 double stdlib_base_dists_halfnormal_stdev( const double sigma ) {
 	if (
 		stdlib_base_is_nan( sigma ) ||