René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"plot_date() after axhline() doesn't rescale axes","articleBody":"If I plot an `axhline` first, and then two points with `plot_date`, the x-axis is not rescaled to the two new data points:\r\n\r\n```python\r\nimport matplotlib.pyplot as plt\r\nfrom datetime import datetime\r\n\r\nfig, axs = plt.subplots(2, 1)\r\n\r\naxs[0].axhline(1.5)\r\naxs[0].plot([datetime(2016, 1, 1, 0, 0, 0), datetime(2016, 1, 2, 0, 0, 0)], [1, 2])\r\n\r\naxs[1].plot([datetime(2016, 1, 1, 0, 0, 0), datetime(2016, 1, 2, 0, 0, 0)], [1, 2])\r\naxs[1].axhline(1.5)\r\n\r\nplt.show()\r\n```\r\n![figure_1-1](https://cloud.githubusercontent.com/assets/6197628/21652428/81cc21c2-d2a4-11e6-86e5-c9235507a643.png)\r\n\r\nI would expect the two plots to be the same, and the plotting order not to matter.\r\n\r\n\r\n\r\nPresent on current master (2.0.0rc2.post2912+g015d8d5) and on 1.5","author":{"url":"https://github.com/dstansby","@type":"Person","name":"dstansby"},"datePublished":"2017-01-04T17:38:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":12},"url":"https://github.com/7742/matplotlib/issues/7742"}