https://www.yan-holtz.com">
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        <p style="max-width: 700px; margin: auto">
          This post describes how to build a button that changes the input
          dataset of a <a href="../barplot.html">barplot</a>. You need to
          understand how to draw a
          <a href="barplot_basic.html">basic barplot first</a>. It is a good way
          to understand the <code>enter()</code> and <code>