tool-modality-attributes-and-pca

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<!DOCTYPE html>
<html>
  <head>
    <meta charset=utf-8>
    <title>Tool modalities</title>
    <link href="https://fonts.googleapis.com/css?family=Roboto+Slab:700" rel="stylesheet">
    <link type="text/css" rel="stylesheet" href="style.css"/>
  </head>
  <body>
    <div id="container"></div>
    <script src="https://d3js.org/d3.v4.min.js"></script>
    <script src="script.js"></script>
  </body>
</html>
​
    

Modified http://d3js.org/d3.v4.min.js to a secure url

https://d3js.org/d3.v4.min.js