René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Axes.cla() with sharex may wrongly reset the axes limit.","articleBody":"### Bug summary\n\nFor example, when  subplot A shares the x-axis with subplot B (A is created with sharex=B), a call to `B.cla()` will set the xlimit to [0, 1], which may not be expected (in contrast, a call to `A.cla()` will not change the xlimit).\r\n\r\nI think the main problem comes from the following function, where it will check whether its `_sharex` attribute is `None`; however, in this case, B is shared to A, but no axis is shared to B, so B's `_sharex` attribute is `None`.\r\nhttps://github.com/matplotlib/matplotlib/blob/9e18a343fb58a2978a8e27df03190ed21c61c343/lib/matplotlib/axes/_base.py#L1369   \n\n### Code for reproduction\n\n```Python\nax = plt.subplot(211)\r\nax2 = plt.subplot(212, sharex=ax)\r\nax.plot(range(50))\r\nax2.plot(range(50))\r\nax.cla()\r\nplt.show()\n```\n\n\n### Actual outcome\n\n![image](https://github.com/matplotlib/matplotlib/assets/12435643/78bf5ac4-c62a-4556-bb9c-51ae7d0cadf0)\r\n\n\n### Expected outcome\n\n![image](https://github.com/matplotlib/matplotlib/assets/12435643/5b22ee2f-473a-4077-b40d-9a609c698ac8)\r\n\n\n### Additional information\n\n_No response_\n\n### Operating system\n\n_No response_\n\n### Matplotlib Version\n\n3.8.3\n\n### Matplotlib Backend\n\n'TkAgg'\n\n### Python version\n\n3.9.13\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\npip","author":{"url":"https://github.com/tianzhuqiao","@type":"Person","name":"tianzhuqiao"},"datePublished":"2024-02-27T02:13:38.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/27825/matplotlib/issues/27825"}