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Backport PR #24320 on branch v3.6.x (DOC: add warning note to imsave) #24323

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Merged
merged 1 commit into from
Nov 1, 2022
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Backport PR #24320 on branch v3.6.x (DOC: add warning note to imsave) #24323

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10 changes: 9 additions & 1 deletion lib/matplotlib/image.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1547,7 +1547,15 @@ def imread(fname, format=None):
def imsave(fname, arr, vmin=None, vmax=None, cmap=None, format=None,
origin=None, dpi=100, *, metadata=None, pil_kwargs=None):
"""
Save an array as an image file.
Colormap and save an array as an image file.

RGB(A) images are passed through. Single channel images will be
colormapped according to *cmap* and *norm*.

.. note ::

If you want to save a single channel image as gray scale please use an
image I/O library (such as pillow, tifffile, or imageio) directly.

Parameters
----------
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