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        <h3 itemscope="" itemtype="http://schema.stenci.la/Heading"
          id="develop-an-interactive-visualisation-with-altair">Develop an interactive visualisation
          with altair</h3>
        <figure itemscope="" itemtype="http://schema.stenci.la/Figure" id="RDwrboyB_NaU">
          <stencila-code-chunk itemscope="" itemtype="http://schema.stenci.la/CodeChunk"
            data-execution_count="16" data-programminglanguage="python">
            <pre class="language-python" itemscope="" itemtype="http://schema.stenci.la/CodeBlock"
              slot="text"><code>import pandas as pd
import numpy as np
import altair as alt</code></pre>
          </stencila-code-chunk>
        </figure>
        <figure itemscope="" itemtype="http://schema.stenci.la/Figure" id="yurcBAFo_uZK">
          <stencila-code-chunk itemscope="" itemtype="http://schema.stenci.la/CodeChunk"
            data-colab="[object Object]" data-outputid="c919d04d-ff59-4ca7-fafa-ff4c1f4705f3"
            data-execution_count="2" data-programminglanguage="python">
            <pre class="language-python" itemscope="" itemtype="http://schema.stenci.la/CodeBlock"
              slot="text"><code>url = &quot;https://gist.githubusercontent.com/seankross/a412dfbd88b3db70b74b/raw/5f23f993cd87c283ce766e7ac6b329ee7cc2e1d1/mtcars.csv&quot;
cars = pd.read_csv(url)
cars.head()</code></pre>
            <figure slot="outputs">
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                    <th itemscope="" itemtype="http://schema.stenci.la/TableCell"></th>
                    <th itemscope="" itemtype="http://schema.stenci.la/TableCell">model</th>
                    <th itemscope="" itemtype="http://schema.stenci.la/TableCell">mpg</th>
                    <th itemscope="" itemtype="http://schema.stenci.la/TableCell">cyl</th>
                    <th itemscope="" itemtype="http://schema.stenci.la/TableCell">disp</th>
                    <th itemscope="" itemtype="http://schema.stenci.la/TableCell">hp</th>
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                        data-itemtype="http://schema.org/Number">0</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell">Mazda RX4</td>
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                        data-itemtype="http://schema.org/Number">21</span></td>
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                        data-itemtype="http://schema.org/Number">3.9</span></td>
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                        data-itemtype="http://schema.org/Number">2.62</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">16.46</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">0</span></td>
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                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
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                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">4</span></td>
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                  <tr itemscope="" itemtype="http://schema.stenci.la/TableRow">
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">1</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell">Mazda RX4 Wag</td>
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                        data-itemtype="http://schema.org/Number">21</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
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                        data-itemtype="http://schema.org/Number">3.9</span></td>
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                        data-itemtype="http://schema.org/Number">2.875</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">17.02</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">0</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">1</span></td>
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                        data-itemtype="http://schema.org/Number">4</span></td>
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                        data-itemtype="http://schema.org/Number">2</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell">Datsun 710</td>
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                        data-itemtype="http://schema.org/Number">22.8</span></td>
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                        data-itemtype="http://schema.org/Number">3.85</span></td>
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                        data-itemtype="http://schema.org/Number">2.32</span></td>
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                        data-itemtype="http://schema.org/Number">18.61</span></td>
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                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell">Hornet 4 Drive
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                        data-itemtype="http://schema.org/Number">21.4</span></td>
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                        data-itemtype="http://schema.org/Number">258</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">110</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">3.08</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">3.215</span></td>
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                        data-itemtype="http://schema.org/Number">19.44</span></td>
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                        data-itemtype="http://schema.org/Number">1</span></td>
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                        data-itemtype="http://schema.org/Number">0</span></td>
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                        data-itemtype="http://schema.org/Number">4</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell">Hornet Sportabout
                    </td>
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                        data-itemtype="http://schema.org/Number">18.7</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">8</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">360</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">175</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">3.15</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">3.44</span></td>
                    <td itemscope="" itemtype="http://schema.stenci.la/TableCell"><span
                        data-itemtype="http://schema.org/Number">17.02</span></td>
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                        data-itemtype="http://schema.org/Number">0</span></td>
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                        data-itemtype="http://schema.org/Number">0</span></td>
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                        data-itemtype="http://schema.org/Number">3</span></td>
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                        data-itemtype="http://schema.org/Number">2</span></td>
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            </figure>
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        </figure>
        <figure itemscope="" itemtype="http://schema.stenci.la/Figure" id="JJHXj8RQAKEG">
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            data-colab="[object Object]" data-outputid="f6bfcc2e-af79-4e6a-e577-c9632bb37f28"
            data-execution_count="15" data-programminglanguage="python">
            <pre class="language-python" itemscope="" itemtype="http://schema.stenci.la/CodeBlock"
              slot="text"><code>chart = alt.Chart(cars)
cars_chart = chart.mark_point().encode(
    x = &#39;wt:Q&#39;,
    y = &#39;mpg:Q&#39;
)
cars_chart</code></pre>
            <figure slot="outputs"><span data-itemtype="http://schema.stenci.la/Null">null</span>
            </figure>
          </stencila-code-chunk>
        </figure>
        <figure itemscope="" itemtype="http://schema.stenci.la/Figure" id="ZxQvRYzTAh47">
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            data-execution_count="null" data-programminglanguage="python">
            <pre class="language-python" itemscope="" itemtype="http://schema.stenci.la/CodeBlock"
              slot="text"><code></code></pre>
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        </figure>
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