René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: 3D surface is not plotted for the contour3d_3 example in the gallery","articleBody":"### Bug summary\n\nThe 3D surface is not plotted for the [contour3d_3 example in the gallery](https://matplotlib.org/stable/gallery/mplot3d/contour3d_3.html).\r\n\n\n### Code for reproduction\n\n```python\n# Straight from the official gallery of matplotlib\r\n# https://matplotlib.org/stable/gallery/mplot3d/contour3d_3.html\r\n\r\nfrom mpl_toolkits.mplot3d import axes3d\r\nimport matplotlib.pyplot as plt\r\nfrom matplotlib import cm\r\n\r\nax = plt.figure().add_subplot(projection='3d')\r\nX, Y, Z = axes3d.get_test_data(0.05)\r\n\r\n# Plot the 3D surface\r\nax.plot_surface(X, Y, Z, rstride=8, cstride=8, alpha=0.3)\r\n\r\n# Plot projections of the contours for each dimension.  By choosing offsets\r\n# that match the appropriate axes limits, the projected contours will sit on\r\n# the 'walls' of the graph.\r\nax.contour(X, Y, Z, zdir='z', offset=-100, cmap=cm.coolwarm)\r\nax.contour(X, Y, Z, zdir='x', offset=-40, cmap=cm.coolwarm)\r\nax.contour(X, Y, Z, zdir='y', offset=40, cmap=cm.coolwarm)\r\n\r\nax.set(xlim=(-40, 40), ylim=(-40, 40), zlim=(-100, 100),\r\n       xlabel='X', ylabel='Y', zlabel='Z')\r\n\r\nplt.show()\n```\n\n\n### Actual outcome\n\n![Projecting contour profiles onto a graph](https://matplotlib.org/stable/_images/sphx_glr_contour3d_3_001.png)\r\n\n\n### Expected outcome\n\nWith matplotlib 1.4.3 it used to look like this:\r\n\r\n![countour3d_3](https://user-images.githubusercontent.com/2605584/190399195-610cee33-e841-460a-a4c9-010bc10f9a57.jpeg)\r\n\n\n### Additional information\n\nLast known working version: matplotlib 1.4.3\r\n\r\nIt is also [broken in matplotlib 2.2.5](https://matplotlib.org/2.2.5/gallery/mplot3d/contour3d_3.html#sphx-glr-gallery-mplot3d-contour3d-3-py)\n\n### Operating system\n\n_No response_\n\n### Matplotlib Version\n\n3.5.3\n\n### Matplotlib Backend\n\n_No response_\n\n### Python version\n\n_No response_\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\n_No response_","author":{"url":"https://github.com/baharev","@type":"Person","name":"baharev"},"datePublished":"2022-09-15T12:09:42.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":9},"url":"https://github.com/23895/matplotlib/issues/23895"}