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      "source": [
        "\n# Annotate polar plots\n\nThis example shows how to create an annotation on a polar graph.\n\nFor a complete overview of the annotation capabilities, also see the\n`annotations`.\n\n.. redirect-from:: /gallery/pyplots/annotation_polar\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "import matplotlib.pyplot as plt\nimport numpy as np\n\nfig = plt.figure()\nax = fig.add_subplot(projection='polar')\nr = np.arange(0, 1, 0.001)\ntheta = 2 * 2*np.pi * r\nline, = ax.plot(theta, r, color='#ee8d18', lw=3)\n\nind = 800\nthisr, thistheta = r[ind], theta[ind]\nax.plot([thistheta], [thisr], 'o')\nax.annotate('a polar annotation',\n            xy=(thistheta, thisr),  # theta, radius\n            xytext=(0.05, 0.05),    # fraction, fraction\n            textcoords='figure fraction',\n            arrowprops=dict(facecolor='black', shrink=0.05),\n            horizontalalignment='left',\n            verticalalignment='bottom',\n            )\nplt.show()"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        ".. admonition:: References\n\n   The use of the following functions, methods, classes and modules is shown\n   in this example:\n\n   - `matplotlib.projections.polar`\n   - `matplotlib.axes.Axes.annotate` / `matplotlib.pyplot.annotate`\n\n"
      ]
    }
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