René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Autoscale does not work for ax.arrow()","articleBody":"### Bug report\r\nAs already stated in this [stack overflow thread](https://stackoverflow.com/questions/37899364/autoscaling-not-working-on-drawing-arrow), when drawing arrows with the arrow()-method, the scale of the plot is not adjusted as expected. A  workaround is to set the limits of the plot manually or to plot additional, invisible points near the arrows. \r\n\r\n## Code for Reproducing the bug\r\n```python\r\nimport matplotlib.pyplot as plt\r\nimport matplotlib\r\nimport sys\r\n\r\nprint(matplotlib.__version__)\r\nprint(sys.version)\r\nfig, ax = plt.subplots()\r\n#ax.set_xlim(0, 5)\r\n#ax.set_ylim(0, 5)\r\nax.arrow(1, 1, 1, 1)\r\nplt.show()\r\n```\r\n\r\nOutput: \r\n```\r\n3.0.1\r\n3.7.0 (default, Oct  9 2018, 10:31:47) \r\n[GCC 7.3.0]\r\n```\r\n\r\n![plot_issue](https://user-images.githubusercontent.com/23025940/47917377-9c6c9080-dea9-11e8-9322-3fa23d428320.png)\r\n\r\n\r\n**Outcome with setting limits manually**\r\n\r\n![plot_right](https://user-images.githubusercontent.com/23025940/47917442-dccc0e80-dea9-11e8-95e7-725d84b2c022.png)\r\n\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: Xubuntu 18.04\r\n  * Matplotlib version: 3.0.1\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): Qt5Agg\r\n  * Python version: 3.7.0\r\n  * Jupyter version (if applicable):\r\n  * Other libraries: \r\n\r\n\u003c!--Please tell us how you installed matplotlib and python e.g., from source, pip, conda--\u003e\r\nI installed matplotlib by using anaconda. \r\n\u003c!--If you installed from conda, please specify which channel you used if not the default--\u003e\r\nI didn't specify a channel, so I guess it was the main channel.\r\n","author":{"url":"https://github.com/CakeUser321","@type":"Person","name":"CakeUser321"},"datePublished":"2018-11-02T13:20:39.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/12712/matplotlib/issues/12712"}