René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"using AxesImage.set_clim() shrinks the colorbar","articleBody":"\u003c!--To help us understand and resolve your issue, please fill out the form to the best of your ability.--\u003e\r\n\u003c!--You can feel free to delete the sections that do not apply.--\u003e\r\n\r\n### Bug report\r\n\r\n**Bug summary**\r\nI am puzzled by the following behavior. Is this intended or a bug?\r\n\r\nAfter creating a colorbar, if setting the limits of the color range with a shorter range of `vmin,vmax` results in a shrunken colorbar\r\n\r\n**Code for reproduction**\r\n\r\n\u003c!--A minimum code snippet required to reproduce the bug, also minimizing the number of dependencies required--\u003e\r\n\r\n```python\r\nfig, ax = plt.subplots()\r\ndata = np.random.random(size=(50,50))\r\nimg = ax.imshow(data)\r\ncb = plt.colorbar(img)\r\n# the colorbar is the same height as the plot at this point\r\n#img.set_clim([0.25,0.75])  # running this line will produce a shrunken colorbar\r\n#img.set_clim([-0.25,1.25])  # running this line will change the limits of the colorbar\r\n                             # and return the colorbar to its original size\r\n```\r\n\r\n**Actual outcome**\r\n\r\nThis is the result of a small animation where vmax is increased from 0.5 to 1.5 then back\r\n\r\n![test](https://user-images.githubusercontent.com/13396853/47778566-73a49980-dcf7-11e8-9eca-06e0c3640819.gif)\r\n\r\n\r\n**Expected outcome**\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\nI was expecting the colorbar to stay the same size, and only the tick range to change. Certainly the colorbar does not grow when setting a larger range of `vmin,vmax` but shrinks when using a smaller range, which seems inconsistent.\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: osx\r\n  * Matplotlib version:  3.0.0\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): nbAgg\r\n  * Python version: Python 3.6.6 |Anaconda, Inc.| (default, Jun 28 2018, 11:07:29) \r\n  * Jupyter version (if applicable):The version of the notebook server is: 5.7.0\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\n\u003c!--If you installed from conda, please specify which channel you used if not the default--\u003e\r\n\r\n","author":{"url":"https://github.com/DizietAsahi","@type":"Person","name":"DizietAsahi"},"datePublished":"2018-10-31T09:30:21.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/12682/matplotlib/issues/12682"}