René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: barplot does not show anything when x or bottom start and end with NaN","articleBody":"### Bug summary\n\nI am not sure if this is a bug or an optimization, but in most cases it is fine to plot bars of arrays containing NaN (only the NaN values are not displayed, the rest is ok).\r\n\r\nHere I found that when the `x` array or the `bottom` array have NaNs at the extremities, no bar is displayed.\r\n\r\n(`barh` has the same behavior).\n\n### Code for reproduction\n\n```python\nimport numpy as np, matplotlib as mpl, matplotlib.pyplot as plt\r\n\r\nbarx = np.arange(3, dtype=float)\r\nbarheights = np.array([0.5, 1.5, 2.0])\r\nbarstarts=np.array([0.77]*3)\r\n\r\nbarx[[0,2]] = np.NaN\r\n# alternatively:\r\n#barstarts[[0,2]] = np.NaN\r\n\r\nfig, ax = plt.subplots()\r\n\r\nax.bar(barx, barheights, bottom=barstarts)\r\n# Not ok, nothing shown!\r\n\r\n# Same behavior with ax.barh:\r\nax.barh(barx, barheights, left=barstarts)\r\n\r\n# However, the behavior is correct when NaN only affect the 'heights' argument:\r\n\r\nfig, ax = plt.subplots()\r\nax.bar(np.arange(3), np.array([np.NaN, 1, np.NaN]), bottom=np.array([0.2, 0.3, 0.4]))\r\n# OK, one bar is displayed.\n```\n\n\n### Actual outcome\n\nzero bar displayed\n\n### Expected outcome\n\nNon-NaN elements should be shown\n\n### Additional information\n\n_No response_\n\n### Operating system\n\nUbuntu 20.04.3\n\n### Matplotlib Version\n\n3.5.3\n\n### Matplotlib Backend\n\nTkAgg, pdf\n\n### Python version\n\n3.8.10\n\n### Jupyter version\n\nipython\n\n### Installation\n\npip","author":{"url":"https://github.com/Gullumluvl","@type":"Person","name":"Gullumluvl"},"datePublished":"2022-08-20T22:07:12.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/23687/matplotlib/issues/23687"}