René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: X-Axis date label not rotated","articleBody":"### Bug summary\n\nUsing a date x-axis that are being autoscaled outside the initial data range due to the added vline then the first (and only the first) data label gets no rotation.\n\n### Code for reproduction\n\n```python\nimport matplotlib.pyplot as plt\r\nimport matplotlib.dates as mdates\r\nimport datetime\r\n\r\ndates = [datetime.datetime(2022, 2, 21, 0, 0),\r\n         datetime.datetime(2022, 2, 22, 0, 0),\r\n         datetime.datetime(2022, 2, 27, 0, 0)]\r\ndata1 = [5,8,12]\r\n\r\nfig, ax = plt.subplots(1, 1, figsize=(20/2.54, 12/2.54))\r\nplt.subplots_adjust(left=0.08, bottom=0.15, right=0.95)\r\nplt.title(\"Date x-axis label angle bug\")\r\n\r\nb1 = ax.bar(dates, data1, width=0.7)\r\n\r\n# Setup the date x-axis in weeks marking start of each week start\r\nax.xaxis.set_major_locator(mdates.WeekdayLocator(byweekday=mdates.MO))\r\nax.xaxis.set_major_formatter(mdates.DateFormatter('%a %b %d'))\r\n\r\n# The same problem regardless the method to set the angle\r\n#for label in ax.get_xticklabels(which='major'):\r\n#    label.set(rotation=30, horizontalalignment='right')\r\nplt.xticks(rotation=30, ha=\"right\")\r\n\r\n# Add a vline to force the auoscaling outside the data range\r\nplt.axvline(x=datetime.datetime(2022, 3, 15, 0, 0))\r\n\r\nplt.show()\n```\n\n\n### Actual outcome\n\nAs can be seen in the screenshot the Feb 28 label is not rotated.\r\n\r\n![Screenshot 2022-02-21 at 16 19 12](https://user-images.githubusercontent.com/1390967/154983352-c9d03bbd-3d10-48b0-89fa-3d0f2fe07eb2.png)\r\n\r\n\n\n### Expected outcome\n\nThat the dates are rotated as in the following screenshot.\r\n![Screenshot 2022-02-21 at 16 22 14](https://user-images.githubusercontent.com/1390967/154983847-c47e312e-dc5e-4f6d-bced-36c53da76700.png)\r\n\r\nNote: As long as the initial dates for the available data extends past Feb 28 then the labels are correctly rotated\n\n### Additional information\n\nThis seems to occur if the autoscale range is forced outside the initial range (as required by the data) by the addition of annotations and/or vlines outside the original x-axis data span.\n\n### Operating system\n\nOSX\n\n### Matplotlib Version\n\n3.5.1\n\n### Matplotlib Backend\n\n_No response_\n\n### Python version\n\n3.9.10\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\npip","author":{"url":"https://github.com/johan162","@type":"Person","name":"johan162"},"datePublished":"2022-02-21T15:30:06.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":9},"url":"https://github.com/22521/matplotlib/issues/22521"}