René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Passing clim as keyword argument to pcolormesh does not change limits.","articleBody":"### Bug report\r\n\r\n**Bug summary**\r\n\r\nNot sure if this is really a bug or just a user issue. I expected that passing a `clim` tuple to `pcolormesh` with no `vmin` or `vmax` specified would update the color scale limits. I found that I had to use `vmin` and `vmax` instead. Maybe I am misunderstanding and `vmin` and `vmax` should always be used. However, it looks like the kwargs are passed into the `QuadMesh` constructor and then `clim` is overwritten with `vmin` and `vmax`, even in they are None and `clim` is given. (https://github.com/heath730/matplotlib/blob/master/lib/matplotlib/axes/_axes.py#L5629). \r\n\r\n**Code for reproduction**\r\n\r\n``` python\r\nimport matplotlib.pyplot as plt\r\nimport numpy as np\r\n\r\n\r\nplot_me = np.random.rand(5, 5)\r\n\r\nplt.subplot(211)\r\nplt.title(\"Expected\")\r\nplt.pcolormesh(plot_me, vmin=0, vmax=0.5)\r\nplt.colorbar()\r\n\r\nplt.subplot(212)\r\nplt.title(\"Result\")\r\nplt.pcolormesh(plot_me, clim=(0, 0.5))\r\nplt.colorbar()\r\n\r\nplt.show()\r\n\r\n```\r\n![figure_1](https://user-images.githubusercontent.com/5819478/35545848-332b5aaa-053f-11e8-83dd-95a7ad2b2796.png)\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: win7\r\n  * Matplotlib version: 2.1.2\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): TkAgg\r\n  * Python version: 3.5.1\r\n  * Jupyter version (if applicable):\r\n  * Other libraries: \r\n\r\n\r\nWould something like:\r\n``` python \r\n  (vmin, vmax) = kwargs.pop('clim', (None, None))\r\n```\r\nBefore the vmin and vmax pops on this [line](https://github.com/heath730/matplotlib/blob/master/lib/matplotlib/axes/_axes.py#L5594) be a reasonable update? \r\n","author":{"url":"https://github.com/heathhenley","@type":"Person","name":"heathhenley"},"datePublished":"2018-01-30T03:10:33.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":9},"url":"https://github.com/10346/matplotlib/issues/10346"}