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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Axes3d plot_surface not supporting masked arrays?","articleBody":"Consider this code:\n\n```\nimport numpy as np\nimport matplotlib.pyplot as plt\nimport matplotlib.colors as colors\nfrom matplotlib import cm\nfrom mpl_toolkits.mplot3d import Axes3D\n\nfig = plt.figure()\nax = fig.add_subplot(1, 1, 1, projection='3d')\n\nx, y = np.meshgrid(np.linspace(-1, 1), np.linspace(-1, 1))\nz = x**2 + y**2\n\nz[10:20, 10:20] = 0.0\n\nmasked_array = np.ma.masked_equal(z, 0.0)\npalette = cm.gray\npalette.set_over('g', 1.0)\npalette.set_under('b', 1.0)\npalette.set_bad('r', 1.0)\n\nax.plot_surface(x,y,masked_array,\n    rstride=1,\n    cstride=1,\n    cmap=palette,\n    vmin=-1,\n    vmax=1,\n    )\nplt.show()\n```\n\nThe area set to zero should be red, but it isn't. It works on a 2d axis using pcolormesh.\n","author":{"url":"https://github.com/maxnoe","@type":"Person","name":"maxnoe"},"datePublished":"2015-08-17T18:51:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/4941/matplotlib/issues/4941"}