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      "cell_type": "markdown",
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      "source": [
        "\n# Ellipse Collection\n\nDrawing a collection of ellipses. While this would equally be possible using\na `~.collections.EllipseCollection` or `~.collections.PathCollection`, the use\nof an `~.collections.EllipseCollection` allows for much shorter code.\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "import matplotlib.pyplot as plt\nimport numpy as np\n\nfrom matplotlib.collections import EllipseCollection\n\nx = np.arange(10)\ny = np.arange(15)\nX, Y = np.meshgrid(x, y)\n\nXY = np.column_stack((X.ravel(), Y.ravel()))\n\nww = X / 10.0\nhh = Y / 15.0\naa = X * 9\n\n\nfig, ax = plt.subplots()\n\nec = EllipseCollection(ww, hh, aa, units='x', offsets=XY,\n                       offset_transform=ax.transData)\nec.set_array((X + Y).ravel())\nax.add_collection(ec)\nax.autoscale_view()\nax.set_xlabel('X')\nax.set_ylabel('y')\ncbar = plt.colorbar(ec)\ncbar.set_label('X+Y')\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.collections`\n   - `matplotlib.collections.EllipseCollection`\n   - `matplotlib.axes.Axes.add_collection`\n   - `matplotlib.axes.Axes.autoscale_view`\n   - `matplotlib.cm.ScalarMappable.set_array`\n\n"
      ]
    }
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