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Don't read full cube into mem for histogramming #191

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Merged
merged 5 commits into from
Jul 26, 2023

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dstansby
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Fixes #187

@@ -33,14 +33,21 @@ def draw(self) -> None:
Clear the axes and histogram the currently selected layer/slice.
"""
layer = self.layers[0]
bins = np.linspace(np.min(layer.data), np.max(layer.data), 100)
print(layer.data.shape)
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Debug output? To be removed?

# Important to calculate bins after slicing 3D data, to avoid reading
# whole cube into memory.
bins = np.linspace(np.min(data), np.max(data), 100)
print(bins)
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Suggested change
print(bins)

Ditto.

@dstansby dstansby merged commit 8dbfdba into matplotlib:main Jul 26, 2023
@dstansby dstansby deleted the histogram-data branch July 26, 2023 14:39
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Don't read all data into memory when launching HistogramWidget
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