{
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      "cell_type": "markdown",
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      "source": [
        "\n# Barcode\nThis demo shows how to produce a bar code.\n\nThe figure size is calculated so that the width in pixels is a multiple of the\nnumber of data points to prevent interpolation artifacts. Additionally, the\n``Axes`` is defined to span the whole figure and all ``Axis`` are turned off.\n\nThe data itself is rendered with `~.Axes.imshow` using\n\n- ``code.reshape(1, -1)`` to turn the data into a 2D array with one row.\n- ``imshow(..., aspect='auto')`` to allow for non-square pixels.\n- ``imshow(..., interpolation='nearest')`` to prevent blurred edges. This\n  should not happen anyway because we fine-tuned the figure width in pixels,\n  but just to be safe.\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "import matplotlib.pyplot as plt\nimport numpy as np\n\ncode = np.array([\n    1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1,\n    0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0,\n    1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1,\n    1, 0, 0, 1, 1, 0, 1, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1])\n\npixel_per_bar = 4\ndpi = 100\n\nfig = plt.figure(figsize=(len(code) * pixel_per_bar / dpi, 2), dpi=dpi)\nax = fig.add_axes((0, 0, 1, 1))  # span the whole figure\nax.set_axis_off()\nax.imshow(code.reshape(1, -1), cmap='binary', aspect='auto',\n          interpolation='nearest')\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.axes.Axes.imshow` / `matplotlib.pyplot.imshow`\n   - `matplotlib.figure.Figure.add_axes`\n\n.. tags::\n\n   component: axes\n   plot-type: imshow\n   purpose: fun\n\n"
      ]
    }
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        "name": "ipython",
        "version": 3
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      "file_extension": ".py",
      "mimetype": "text/x-python",
      "name": "python",
      "nbconvert_exporter": "python",
      "pygments_lexer": "ipython3",
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