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introduce max_val parameter in image plot #2848

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introduce max_val parameter in image plot #2848

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59d8168
introduce max_val parameter in image plot
sd3ntato Jan 30, 2023
feb1de5
Merge branch 'master' into patch-1
connortann Dec 4, 2023
a14a90d
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Dec 4, 2023
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9 changes: 7 additions & 2 deletions shap/plots/_image.py
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Original file line number Diff line number Diff line change
Expand Up @@ -28,7 +28,9 @@ def image(shap_values: Explanation or np.ndarray,
hspace: Optional[float] = 0.2,
labelpad: Optional[float] = None,
cmap: Optional[str or Colormap] = colors.red_transparent_blue,
show: Optional[bool] = True):
show: Optional[bool] = True,
max_val: Optiona[float] = None
):
"""Plots SHAP values for image inputs.

Parameters
Expand Down Expand Up @@ -157,7 +159,10 @@ def image(shap_values: Explanation or np.ndarray,
abs_vals = np.stack([np.abs(shap_values[i]) for i in range(len(shap_values))], 0).flatten()
else:
abs_vals = np.stack([np.abs(shap_values[i].sum(-1)) for i in range(len(shap_values))], 0).flatten()
max_val = np.nanpercentile(abs_vals, 99.9)

if max_val is None:
max_val = np.nanpercentile(abs_vals, 99.9)

for i in range(len(shap_values)):
if labels is not None:
axes[row, i + 1].set_title(labels[row, i], **label_kwargs)
Expand Down