René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: aspect ratio control of colorbar Axes fails.","articleBody":"### Bug summary\n\nPreviously, a colorbar axes could be created with a specified aspect ratio and adjustable \"box\". Now it leaves whitespace either at the ends or on the sides.\n\n### Code for reproduction\n\n```python\nimport numpy as np\r\nimport matplotlib.pyplot as plt\r\nimport matplotlib.colorbar as mcolorbar\r\n\r\nfig, axs = plt.subplots(ncols=3, sharey=True)\r\nfor ax, aspect in zip(axs, (20, 40, None)):\r\n    cs = ax.contourf(np.arange(24).reshape((4, 6)), levels=[2, 4, 8, 16], extend=\"both\")\r\n    cax, kw = mcolorbar.make_axes(ax)\r\n    if aspect is not None:\r\n        cax.set_aspect(aspect, anchor=(0.8, 0.5), adjustable='box')\r\n        ax.set_title(f\"Cbar aspect is {aspect}\")\r\n    else:\r\n        ax.set_title(\"No cbar aspect\")\r\n    cbar = fig.colorbar(cs, cax=cax)\r\n    print(cax.get_aspect(), cax.get_adjustable())\r\nfig.savefig(\"colorbar_aspect.png\")\n```\n\n\n### Actual outcome\n\n![colorbar_aspect](https://user-images.githubusercontent.com/85125/147905094-7d06dd48-8ba9-4a29-961a-e7569b6a9d40.png)\r\n\n\n### Expected outcome\n\nE.g., using mpl 3.4.3:\r\n![colorbar_aspect_3-4-3](https://user-images.githubusercontent.com/85125/147905547-37f44956-fe55-48a2-b657-8953902505c8.png)\r\n\n\n### Additional information\n\nThe result is even worse with 3.5.0: the first 2 colorbars in the example are blank except for the triangles.\r\n\n\n### Operating system\n\nOS/X\n\n### Matplotlib Version\n\n3.5.1\n\n### Matplotlib Backend\n\n_No response_\n\n### Python version\n\n3.7.12\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\nconda","author":{"url":"https://github.com/efiring","@type":"Person","name":"efiring"},"datePublished":"2022-01-03T07:02:16.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":11},"url":"https://github.com/22087/matplotlib/issues/22087"}