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Backport PR #27244 on branch v3.8.x (Clarify semantics of plt.matshow(..., fignum=...).) #27246

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Merged
merged 1 commit into from
Nov 1, 2023
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Backport PR #27244 on branch v3.8.x (Clarify semantics of plt.matshow(..., fignum=...).) #27246

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17 changes: 7 additions & 10 deletions lib/matplotlib/pyplot.py
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Expand Up @@ -2413,18 +2413,15 @@ def matshow(A: ArrayLike, fignum: None | int = None, **kwargs) -> AxesImage:
The matrix to be displayed.

fignum : None or int
If *None*, create a new figure window with automatic numbering.
If *None*, create a new, appropriately sized figure window.

If a nonzero integer, draw into the figure with the given number
(create it if it does not exist).
If 0, use the current Axes (creating one if there is none, without ever
adjusting the figure size).

If 0, use the current axes (or create one if it does not exist).

.. note::

Because of how `.Axes.matshow` tries to set the figure aspect
ratio to be the one of the array, strange things may happen if you
reuse an existing figure.
Otherwise, create a new Axes on the figure with the given number
(creating it at the appropriate size if it does not exist, but not
adjusting the figure size otherwise). Note that this will be drawn on
top of any preexisting Axes on the figure.

Returns
-------
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