René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Stackplot fails for small numbers","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\nIt appears that `stackplot` fails for small numbers in version 3.2.1, or at least something goes wrong in my clean installation, see figures below.\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\nimport numpy as np\r\nimport matplotlib.pyplot as plt\r\n\r\nx =  [0, 1]\r\ny1 = 1e-8*np.ones_like(x)\r\ny2 = 1e-9*np.ones_like(x)\r\n\r\nfig, axs = plt.subplots(2, 1)\r\naxs[0].stackplot(x, y1, y2)  # This plot is fine\r\naxs[1].stackplot(x, y1/10, y2/10)  # This plot is wrong\r\nplt.show()\r\n```\r\n\r\n**Actual outcome**\r\n![image](https://user-images.githubusercontent.com/3267619/84637648-4d1d8b80-af39-11ea-8f33-624ef07089e6.png)\r\nSomething went wrong in the second subplot.\r\n\u003c!--The output produced by the above code, which may be a screenshot, console output, etc.--\u003e\r\n\r\n**Expected outcome**\r\nExpected this, as generated with `matplotlib` version 3.1.2\r\n![mpl312](https://user-images.githubusercontent.com/3267619/84637520-219aa100-af39-11ea-8319-e9166e6d9f64.png)\r\n\r\n\u003c!--A description of the expected outcome from the code snippet--\u003e\r\n\u003c!--If this used to work in an earlier version of Matplotlib, please note the version it used to work on--\u003e\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: macOS 10.12.6 (Sierra)\r\n  * Matplotlib version: 3.2.1\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): MacOSX\r\n  * Python version: 3.8.3\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\nCreated a conda environment with only the`numpy` package, then installed matplotlib with `pip`.","author":{"url":"https://github.com/svaberg","@type":"Person","name":"svaberg"},"datePublished":"2020-06-15T08:54:40.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/17633/matplotlib/issues/17633"}