René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Bbox.frozen() does not copy minposx/minposy","articleBody":"\u003c!--To help us understand and resolve your issue, please fill out the form to the best of your ability.--\u003e\r\n\u003c!--You can feel free to delete the sections that do not apply.--\u003e\r\n\r\n### Bug report\r\n\r\n**Bug summary**\r\n\r\nAll's in the title.\r\n\r\nOne use case which showcases this is to prevent an artist from participating in autoscaling (in effect, a slightly hackish way to implement something like https://github.com/matplotlib/matplotlib/pull/15595):\r\n```python\r\nax = ...\r\ndl = ax.dataLim.frozen()\r\nax.plot(...)\r\n# restore old datalim, so that plot() does not participate in autoscale\r\nax.dataLim = dl\r\n```\r\nwhich works... except for log-scale, as that needs also copying minposx/minposy.\r\n\r\n**Code for reproduction**\r\n\r\n\u003c!--A minimum code snippet required to reproduce the bug.\r\nPlease make sure to minimize the number of dependencies required, and provide\r\nany necessary plotted data.\r\nAvoid using threads, as Matplotlib is (explicitly) not thread-safe.--\u003e\r\n\r\n```python\r\nfrom pylab import *\r\nplot([1, 2]); print(gca().dataLim.minposx, gca().dataLim.frozen().minposx)\r\n```\r\n\r\n**Actual outcome**\r\n\r\n\u003c!--The output produced by the above code, which may be a screenshot, console output, etc.--\u003e\r\n\r\n```\r\n1.0 inf\r\n```\r\n\r\n**Expected outcome**\r\n\r\n```\r\n1.0 1.0\r\n```\r\n\r\n**Matplotlib version**\r\n\u003c!--Please specify your platform and versions of the relevant libraries you are using:--\u003e\r\n  * Operating system: linux\r\n  * Matplotlib version (`import matplotlib; print(matplotlib.__version__)`): master (3.3.x)\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): any\r\n  * Python version: 3.9\r\n  * Jupyter version (if applicable):\r\n  * Other libraries: \r\n\r\n\u003c!--Please tell us how you installed matplotlib and python e.g., from source, pip, conda--\u003e\r\n\u003c!--If you installed from conda, please specify which channel you used if not the default--\u003e\r\n\r\n","author":{"url":"https://github.com/anntzer","@type":"Person","name":"anntzer"},"datePublished":"2021-01-14T12:41:25.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/19296/matplotlib/issues/19296"}