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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Adding twin axes into polar coordinate system","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\nAdding twin x Axes into polar coordinate system seems does not work\r\n**Bug summary**\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 numpy as np\r\nfrom matplotlib.ticker import FormatStrFormatter\r\nimport matplotlib.pyplot as plt\r\n\r\n\r\nlabels = np.array(['E', '', 'N', '', 'W', '', 'S', ''])\r\ndataLength = 8\r\ndata = np.array([3.23, 3.23, 9.68, 3.23, 12.90, 32.26, 6.45, 29.03])\r\nangles = np.linspace(0, 2*np.pi, dataLength, endpoint=False)\r\n\r\nwidth = np.pi/8*np.array([1]*8)\r\n\r\nax = plt.subplot(111, projection='polar')\r\nax2 = ax.twinx()\r\n\r\nbars = ax.bar(angles, data, alpha=0.4, label=labels, width=width, bottom=0.0, color=\"red\")\r\n\r\ndata = np.array([10.3, 2.23, 15.68, 13.23, 12.90, 12.26, 8.45, 29.03])\r\ndata = np.concatenate((data, [data[0]]))\r\nangles = np.concatenate((angles, [angles[0]]))\r\n\r\nplots = ax.plot(angles, data, alpha=0.7, linestyle=\"--\", linewidth=1, color=\"blue\")\r\nplt.fill(angles, data, facecolor='blue', alpha=0.25)\r\n\r\ngridLines, gridLabel = ax.set_thetagrids(angles * 180/np.pi, labels, fontproperties=\"DejaVu Sans\")\r\n\r\nax.yaxis.set_major_formatter(FormatStrFormatter('%d%%'))\r\n\r\nplt.yticks(fontsize=8)\r\nplt.xticks(fontsize=15)\r\n\r\n[label.set_fontweight('bold') for label in ax.get_xticklabels()]\r\n[label.set_color('blue') for label in ax.get_yticklabels()]\r\n\r\nplt.show()\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\n\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**Matplotlib version**\r\n\u003c!--Please specify your platform and versions of the relevant libraries you are using:--\u003e\r\n  * Operating system:\r\n  * Matplotlib version: \r\n  * Matplotlib backend (`print(matplotlib.get_backend())`):\r\n  * Python version:\r\n  * Jupyter version (if applicable):\r\n  * Other libraries: \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/519165198","@type":"Person","name":"519165198"},"datePublished":"2018-10-12T16:12:58.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/12506/matplotlib/issues/12506"}