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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"PGF Backend: \"Dimension too large\" error while processing log-scale plot","articleBody":"The PGF backend of MPL 1.4.3 causes a \"Dimension too large\" LaTeX error when processing a log-scale plot with a point at zero. The error is\n\n```\n[...]\n! Dimension too large.\n\u003cto be read again\u003e \n                   \\pgf@y \nl.69 ...\\pgfqpoint{-2148537.332542in}{0.600000in}}\n                                                  %\nNo pages of output.\nTranscript written on figure.log.\n```\n\nObviously, the _x_ coordinate of the point is way out of bounds. The script triggering the error is\n\n``` python\nimport matplotlib as mpl\nmpl.use('pgf')\nimport matplotlib.pyplot as plt\n\nfig, ax = plt.subplots()\nax.plot([0, 1], [.5, 1])\nax.set_xscale('log')\nfig.savefig('fig.pdf')\n```\n\nAdding `nonposx='mask'` to the call to `set_xscale` prevents the error but produces a plot consisting of only a single point. The PGF version installed is 2.10 but the error also occurs with PGF 3.00.\n","author":{"url":"https://github.com/rwirth","@type":"Person","name":"rwirth"},"datePublished":"2015-05-28T09:34:53.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":40},"url":"https://github.com/4482/matplotlib/issues/4482"}