René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"matplotlib 3D surface - gaps / holes in surface","articleBody":"### Bug report\r\n\r\n**Bug summary**\r\n\r\nA grid is interpolated with scipy's `griddata()` and contains values and NaNs. However, when the grid is plotted with mplot3d's `plot_surface()` there are gaps in the surface (see upper plot). The lower the view height, the more of such gaps are rendered. When the grid is plotted in 2D with `imshow()` there are no gaps (see lower plot).\r\n\r\n**Code for reproduction**\r\n\r\n```python\r\nimport numpy as np\r\nimport matplotlib.pyplot as plt\r\nfrom mpl_toolkits.mplot3d import Axes3D\r\n\r\nZ = np.loadtxt('data.txt')\r\nX = np.linspace(0,3,301)\r\nY = np.linspace(0,3,301)\r\nX = np.array([X,]*(301)).transpose()\r\nY = np.array([Y,]*(301))\r\nfig = plt.figure(figsize=(15,15), dpi=100)\r\nax = fig.add_subplot(2, 1, 1, projection='3d')\r\nax.view_init(40,300)\r\nsurf = ax.plot_surface(X, Y, Z, cmap='jet', rstride=1, cstride=1, antialiased=False, shade=False, alpha=1.0, linewidth=0, vmin=0.25, vmax=0.35);\r\n\r\nax.invert_yaxis()\r\nax.dist = 11\r\n\r\nax = fig.add_subplot(2, 1, 2)\r\nplt.imshow(Z, cmap='jet', vmin=0.25, vmax=0.35, origin='lower');\r\n\r\nplt.show()\r\n\r\n```\r\n\r\n**Actual outcome**\r\n\r\n\r\n![](https://i.stack.imgur.com/rSj0u.png)\r\nClose-up:\r\n\r\n![](https://i.stack.imgur.com/tsdkh.png)\r\n\r\n\r\n**Expected outcome**\r\n\r\nNo holes in the 3D surface plot.\r\n\r\n**Matplotlib version**\r\n\r\nMatplotlib 1.3.0 to 1.5.3 (WinPython 3.3.2.3 to 3.5.2.3), but it was also reproduced up to Matplotlib 2.0: [http://stackoverflow.com/questions/41268550/matplotlib-3d-surface-gaps-holes-in-surface](http://stackoverflow.com/questions/41268550/matplotlib-3d-surface-gaps-holes-in-surface)\r\n\r\n","author":{"url":"https://github.com/fmevers","@type":"Person","name":"fmevers"},"datePublished":"2017-03-07T13:19:15.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/8222/matplotlib/issues/8222"}