René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"2.1 - new problem with log ax.transData","articleBody":"\u003c!--To help us understand and resolve your issue, please fill out the form to the best of your ability.--\u003e\r\n\u003c!--You can feel free to delete the sections that do not apply.--\u003e\r\n\r\n### Bug report\r\n\r\n**ax.transData returns np.nan for x value if invalid y value is supplied if log yscale**\r\n\r\n\u003c!--A short 1-2 sentences that succinctly describes the bug--\u003e\r\n\r\n**Code for reproduction**\r\n\r\n\u003c!--A minimum code snippet required to reproduce the bug, also minimizing the number of dependencies required--\u003e\r\n\r\n```python\r\nimport matplotlib.pylab as plt\r\nf = plt.figure()\r\nax = f.add_subplot(111)\r\nax.set_yscale('log')\r\nax.transData.transform([0,0])\r\n```\r\n\r\n**Actual outcome**\r\n\r\n\u003c!--The output produced by the above code, which may be a screenshot, console output, etc.--\u003e\r\n\r\n```\r\narray([ nan,  nan])\r\n```\r\n\r\n**Expected outcome**\r\n\r\n\u003c!--A description of the expected outcome from the code snippet--\u003e\r\n\u003c!--If this used to work in an earlier version of Matplotlib, please note the version it used to work on--\u003e\r\n\r\n```\r\n array([ 81.5  ,  nan])\r\n```\r\nOutcome in mpl 2.0.2 was\r\n\r\n```\r\narray([  8.16000000e+01,  -1.02745008e+05])\r\n```\r\n\r\nThere is no real reason both values be nan.\r\n\r\n\r\n\r\n**Matplotlib version**\r\n\u003c!--Please specify your platform and versions of the relevant libraries you are using:--\u003e\r\n  * Operating system: Fedora 26, x64\r\n  * Matplotlib version: 2.1.0, with pr #9363 \r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): TkAgg\r\n  * Python version: 3.6.3\r\n  * Jupyter version (if applicable):\r\n  * Other libraries: mpl 1.13.3\r\n\r\n\u003c!--Please tell us how you installed matplotlib and python e.g., from source, pip, conda--\u003e\r\n\u003c!--If you installed from conda, please specify which channel you used if not the default--\u003e\r\n\r\n","author":{"url":"https://github.com/2sn","@type":"Person","name":"2sn"},"datePublished":"2017-10-11T15:25:22.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/9369/matplotlib/issues/9369"}