[MNT] narwhals migration - #965

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narwhals-migration

Commits on Aug 24, 2026

start narwhals migration
solegalli
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fbbf160
fix doc test
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7f33552
refactor dataframe checks to accept narwahls dfs (#966)
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ce81a1e
Remove sklearn<=1.6 compatibility code (#985)
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4025eec
address review feedback on dataframe_checks.py (#989)

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a814ae4
refactor variable handling module for narwahls (#978)

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ff5d212
refactor creation base for narwhals compatibility (#990)
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45b9d1a
Migrate CyclicalFeatures to narwhals, add polars support (#991)
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0d32d83
Migrate GeoDistanceFeatures to narwhals, add polars support (#993)
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13187db
Migrate MathFeatures to narwhals, add polars support (#994)

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85be399
Migrate RelativeFeatures to narwhals+numpy, add polars support (#995)

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295f9d1
Migrate DecisionTreeFeatures to narwhals, add polars support (#996)

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ed91d48

Commits on Aug 25, 2026

Migrate ReciprocalTransformer to narwhals, add polars support (#997)

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b766a5b
Migrate ArcsinTransformer to narwhals, add polars support (#998)

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53a11b9
Migrate ArcSinhTransformer to narwhals, add polars support (#1000)

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9b3b226
Migrate PowerTransformer to narwhals, add polars support (#1005)

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0e105a9
Migrate BoxCoxTransformer to narwhals, add polars support (#1006)

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08a06a0
Migrate YeoJohnsonTransformer to narwhals, add polars support (#1007)

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5695fa7
Migrate LogTransformer/LogCpTransformer to narwhals, add polars support (#1008)

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ddbb256

Commits on Aug 30, 2026

Short-circuit _check_contains_na when variables list is empty (#1018)

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fd4f8ee
Return narwhals frame from check_X / check_X_y (#1019)

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ec26810
Adapt creation transformers to narwhals-returning check_X (#1020)

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50b2d3a
Adapt numerical base transformers to narwhals-returning check_X (#1022)
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0fca9c6
Migrate BaseImputer to narwhals, add polars support (#1002)

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04c88dc
update base imputer again (#1023)
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211d79e
Narwhals mean median imputer (#1015)

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73c0041
Narwhals end tail imputer (#1013)

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6e0a299
Migrate ArbitraryImputer to narwhals, add polars support (#1003)

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8049df6
migrate missing indicator to narwhals, add polar support (#1001)

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614493f
Narwhals random sample imputer (#1014)

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13ac25d
Narwhals drop missing data (#1016)

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2f24611
Narwhals categorical imputer (#1009)

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1fc1ea7
Fix RandomSampleImputer and DropMissingData on non-pandas backends (#1024)

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6def4de
Migrate DatetimeOrdinal to narwhals+numpy, add polars support (#1010)

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a98990a
Migrate DatetimeFeatures to narwhals, add polars support (#1011)

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d50bb28
Migrate DatetimeSubtraction to narwhals+numpy, add polars support (#1012)

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2b8bcf3
Migrate CategoricalMethodsMixin (encoding base) to narwhals, add pola… (#999)

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b430464