René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: surface_plot cannot generate image even the axis","articleBody":"### Bug summary\n\nWhen I used surface_plot function with matplotlib version 3.6.2 on MacOS to draw a 3D image, nothing appears even the axis.\r\nWhen I tried to degrade matplotlib to 3.5 and run the same code, it works.\n\n### Code for reproduction\n\n```python\nimport numpy as np\r\nimport matplotlib.pyplot as plt\r\nfrom mpl_toolkits.mplot3d import Axes3D\r\nfrom scipy.stats import multivariate_normal\r\ndef Gaussian_Distribution(N=2, M=1000, m=0, sigma=1):\r\n    mean = np.zeros(N) + m\r\n    cov = np.eye(N) * sigma\r\n\r\n    data = np.random.multivariate_normal(mean, cov, M)\r\n    Gaussian = multivariate_normal(mean=mean, cov=cov)\r\n    \r\n    return data, Gaussian\r\n\r\nM = 100\r\ndata, Gaussian = Gaussian_Distribution(N=2, M=M, sigma=0.1)\r\nX, Y = np.meshgrid(np.linspace(-1,1,M), np.linspace(-1,1,M))\r\nd = np.dstack([X,Y])\r\nZ = Gaussian.pdf(d).reshape(M,M)\r\n\r\n\r\nfig = plt.figure(figsize=(6,4))\r\nax = Axes3D(fig)\r\nax.plot_surface(X, Y, Z, rstride=1, cstride=1, cmap='seismic', alpha=0.8)\r\n\r\nax.set_xlabel('X')\r\nax.set_ylabel('Y')\r\nax.set_zlabel('Z')\r\nplt.savefig('123.png')\r\nplt.show()\n```\n\n\n### Actual outcome\n\n![123](https://user-images.githubusercontent.com/39575986/207578886-aaee6378-0081-4d0e-b796-8878becb4302.png)\r\n\n\n### Expected outcome\n\n![123](https://user-images.githubusercontent.com/39575986/207578751-d045f2f8-d851-4fce-a02d-840ca8616b84.png)\r\n\n\n### Additional information\n\n_No response_\n\n### Operating system\n\n_No response_\n\n### Matplotlib Version\n\n3.6.2\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\nNone","author":{"url":"https://github.com/VaneYb","@type":"Person","name":"VaneYb"},"datePublished":"2022-12-14T11:05:05.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/24725/matplotlib/issues/24725"}