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NeuroScopeRawIO: use lfpSamplingRate for .lfp and .eeg files #1967

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NeuroScopeRawIO: use lfpSamplingRate for .lfp and .eeg files #1967

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5 changes: 5 additions & 0 deletions neo/rawio/neuroscoperawio.py
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Original file line number Diff line number Diff line change
Expand Up @@ -85,6 +85,11 @@ def _parse_header(self):
nbits = int(acq.find("nBits").text)
nb_channel = int(acq.find("nChannels").text)
self._sampling_rate = float(acq.find("samplingRate").text)
# .lfp and .eeg files are downsampled and their rate is stored separately
if self.data_file_path.suffix in (".lfp", ".eeg"):
lfp_sampling_rate = root.find("fieldPotentials/lfpSamplingRate")
if lfp_sampling_rate is not None:
self._sampling_rate = float(lfp_sampling_rate.text)
voltage_range = float(acq.find("voltageRange").text)
# offset = int(acq.find('offset').text)
amplification = float(acq.find("amplification").text)
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10 changes: 10 additions & 0 deletions neo/test/rawiotest/test_neuroscoperawio.py
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Expand Up @@ -29,6 +29,16 @@ def test_signal_scale(self):
# scale is in mV = range of recording in volts * 1000 mV/V /(number of bits * ampification)
self.assertAlmostEqual(20.0 * 1000 / (2**16 * 1000), gain)

def test_lfp_sampling_rate(self):
local_test_dir = get_local_testing_data_folder()
# the xml has samplingRate 20000 for the .dat and lfpSamplingRate 1250 for .eeg/.lfp
for suffix in (".eeg", ".lfp"):
fname = local_test_dir / f"neuroscope/dataset_1/YutaMouse42-151117{suffix}"
reader = NeuroScopeRawIO(filename=fname)
reader.parse_header()
assert reader.header["signal_channels"]["sampling_rate"][0] == 1250.0
assert reader.segment_t_stop(0, 0) == 10 / 1250.0

def test_binary_argument_with_non_canonical_xml_file(self):

local_test_dir = get_local_testing_data_folder()
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