for the y-axis data will be called with the x-axis data as its first argument.</p>
<p>For example, in the bar plot below <code>categories</code> generates the categories to plot on the x-axis and <code>heights</code> generates the y-axis heights. The <code>heights</code> function uses the parameter <code>xs</code> which is the array of x-axis data points.</p>

</div>
</div>
</div>

  

  <div class="
      cell border-box-sizing code_cell rendered">
    <div class="input">

<div class="inner_cell">
    <div