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Fix edges of 2d-histogram in UnitWaveformDensityMapWidget #4283

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Fix edges of 2d-histogram in UnitWaveformDensityMapWidget #4283

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f91f693
minor: change deprecated channel_slice to select_channels
ecobost Dec 6, 2025
7882052
delete _channel_slice (used by no previous channel_slice function)
ecobost Dec 6, 2025
47e31d7
fix edges in density_map
ecobost Dec 25, 2025
944c993
Merge remote-tracking branch 'upstream/main'
ecobost Dec 25, 2025
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16 changes: 5 additions & 11 deletions src/spikeinterface/widgets/unit_waveforms_density_map.py
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Original file line number Diff line number Diff line change
Expand Up @@ -83,8 +83,8 @@ def __init__(
templates = ext_templates.get_templates(unit_ids=unit_ids)
bin_min = np.min(templates) * 1.3
bin_max = np.max(templates) * 1.3
bin_size = (bin_max - bin_min) / 100
bins = np.arange(bin_min, bin_max, bin_size)
num_bins = 100
bins = np.linspace(bin_min, bin_max, num_bins + 1)

# 2d histograms
if same_axis:
Expand Down Expand Up @@ -121,14 +121,9 @@ def __init__(
wfs = wfs_

# make histogram density
wfs_flat = wfs.swapaxes(1, 2).reshape(wfs.shape[0], -1)
hist2d = np.zeros((wfs_flat.shape[1], bins.size))
indexes0 = np.arange(wfs_flat.shape[1])

wf_bined = np.floor((wfs_flat - bin_min) / bin_size).astype("int32")
wf_bined = wf_bined.clip(0, bins.size - 1)
for d in wf_bined:
hist2d[indexes0, d] += 1
wfs_flat = wfs.swapaxes(1, 2).reshape(wfs.shape[0], -1) # num_spikes x times*num_channels
hists_per_timepoint = [np.histogram(one_timepoint, bins=bins)[0] for one_timepoint in wfs_flat.T]
hist2d = np.stack(hists_per_timepoint)

if same_axis:
if all_hist2d is None:
Expand Down Expand Up @@ -169,7 +164,6 @@ def __init__(
BaseWidget.__init__(self, plot_data, backend=backend, **backend_kwargs)

def plot_matplotlib(self, data_plot, **backend_kwargs):
import matplotlib.pyplot as plt
from .utils_matplotlib import make_mpl_figure

dp = to_attr(data_plot)
Expand Down