René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Misalignment imshow vs. grid lines","articleBody":"The following script show a mis-alignment between grid lines and image patterns while they should be aligned:\n\n``` python\nimport numpy as np\nimport matplotlib\nmatplotlib.use('Agg')\nimport matplotlib.pyplot as plt\n\nn = 16\nfig = plt.figure(figsize=(6,6))\nZ = np.zeros((n,n))\nZ[::2,::2] = Z[1::2,1::2] = 1\nplt.imshow(Z, interpolation='none', cmap=plt.cm.gray, extent=[0,n,0,n], alpha=0.25)\nplt.xticks(np.arange(0,n), []), plt.yticks(np.arange(0,n), [])\nplt.grid(ls='solid')\ndelta = 0.01\nplt.xlim(1-delta,1+delta), plt.ylim(1-delta,1+delta)\nplt.savefig('pylab-grid.png')\nplt.savefig('pylab-grid.pdf')\n```\n","author":{"url":"https://github.com/rougier","@type":"Person","name":"rougier"},"datePublished":"2012-10-31T13:07:35.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":18},"url":"https://github.com/1441/matplotlib/issues/1441"}