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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Figure.colorbar triggers colormesh deprecation","articleBody":"### Bug summary\n\nxref https://github.com/matplotlib/matplotlib/issues/21723\r\n\r\nIn pandas, we have this matplotlib code calling `Figure.colorbar` which is triggering the colormesh deprecation:\r\n\r\n```\r\nAuto-removal of grids by pcolor() and pcolormesh() is deprecated since 3.5 and will be removed two minor releases later; please call grid(False) first.\r\n```\r\n\r\nhttps://github.com/pandas-dev/pandas/blob/03b4095f9de08af16db9698f15161b5a13a42286/pandas/plotting/_matplotlib/core.py#L1175-L1176\r\n\r\nAnd calling `ax.grid(False)` does not address the deprecation\r\n\r\n```\r\ndiff --git a/pandas/plotting/_matplotlib/core.py b/pandas/plotting/_matplotlib/core.py\r\nindex ee7493813f..69c749e84b 100644\r\n--- a/pandas/plotting/_matplotlib/core.py\r\n+++ b/pandas/plotting/_matplotlib/core.py\r\n@@ -1172,6 +1172,7 @@ class PlanePlot(MPLPlot, ABC):\r\n         # GH33389, if ax is used multiple times, we should always\r\n         # use the last one which contains the latest information\r\n         # about the ax\r\n+        ax.grid(False)\r\n         img = ax.collections[-1]\r\n         return self.fig.colorbar(img, ax=ax, **kwds)\r\n```\n\n### Code for reproduction\n\n```python\nhttps://github.com/pandas-dev/pandas/blob/03b4095f9de08af16db9698f15161b5a13a42286/pandas/plotting/_matplotlib/core.py#L1175-L1176\n```\n\n\n### Actual outcome\n\n`Auto-removal of grids by pcolor() and pcolormesh() is deprecated since 3.5 and will be removed two minor releases later; please call grid(False) first.`\n\n### Expected outcome\n\nNo deprecation warning.\n\n### Additional information\n\n_No response_\n\n### Operating system\n\n_No response_\n\n### Matplotlib Version\n\n3.5.2\n\n### Matplotlib Backend\n\n_No response_\n\n### Python version\n\n_No response_\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\n_No response_","author":{"url":"https://github.com/mroeschke","@type":"Person","name":"mroeschke"},"datePublished":"2022-08-14T04:33:09.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/23614/matplotlib/issues/23614"}