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DOC: improve interpolation kwarg doc in imshow [ci doc] #25585

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Mar 31, 2023
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DOC: improve interpolation kwarg doc in imshow [ci doc] #25585

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14 changes: 9 additions & 5 deletions lib/matplotlib/axes/_axes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5508,11 +5508,15 @@ def imshow(self, X, cmap=None, norm=None, *, aspect=None,
'kaiser', 'quadric', 'catrom', 'gaussian', 'bessel', 'mitchell',
'sinc', 'lanczos', 'blackman'.

If *interpolation* is 'none', then no interpolation is performed
on the Agg, ps, pdf and svg backends. Other backends will fall back
to 'nearest'. Note that most SVG renderers perform interpolation at
rendering and that the default interpolation method they implement
may differ.
The data *X* is resampled to the pixel size of the image on the
figure canvas, using the interpolation method to either up- or
downsample the data.

If *interpolation* is 'none', then for the ps, pdf, and svg
backends no down- or upsampling occurs, and the image data is
passed to the backend as a native image. Note that different ps,
pdf, and svg viewers may display these raw pixels differently. On
other backends, 'none' is the same as 'nearest'.

If *interpolation* is the default 'antialiased', then 'nearest'
interpolation is used if the image is upsampled by more than a
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