René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Trying to set_ylim(bottom=0) on a log scaled axis changes plot","articleBody":"```python\r\nimport matplotlib.pyplot as plt\r\n\r\nfig, axs = plt.subplots(2, 1)\r\n\r\naxs[0].scatter(range(0, 4), [0, 1, 2, 3])\r\naxs[1].scatter(range(0, 4), [0, 1, 2, 3])\r\n\r\naxs[0].set_yscale('log')\r\naxs[1].set_yscale('log')\r\n\r\naxs[1].set_ylim(bottom=0)\r\n\r\nplt.show()\r\n```\r\n\r\nThis raises\r\n```\r\n/home/dstansby/matplotlib/lib/matplotlib/axes/_base.py:3174: UserWarning: Attempted to set non-positive ylimits for log-scale axis; invalid limits will be ignored.\r\n  'Attempted to set non-positive ylimits for log-scale axis; '\r\n```\r\n\r\nHowever, the 2nd plot *is* changed by the `set_ylim(bottom=0)` call, and no data is visible.\r\n\r\n![figure_1](https://cloud.githubusercontent.com/assets/6197628/21616640/2654ac76-d1da-11e6-800a-96b2027e9947.png)\r\n\r\nThis is present on master. ","author":{"url":"https://github.com/dstansby","@type":"Person","name":"dstansby"},"datePublished":"2017-01-03T12:42:01.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/7733/matplotlib/issues/7733"}