#StackBounty: #javascript #plotly #plotly.js Customise hover of parcats plotly.js chart

Bounty: 500

I’ve used a plotly.js parcats chart to make a sequential sankey (eg https://github.com/EE2dev/sequence-explorer). Here are the example parcats that shows changes in grades between quizzes:

var trace1 = {
  type: 'parcats',
  hoveron: 'color',
  dimensions: [
    {
      label: 'Quiz 1',
      values: ['Black', 'Black', 'Black', 'Brown', 'Brown', 'Brown', 'Red', 'Brown'],
    },
    {
      label: 'Quiz 2',
      values: ['Brown', 'Brown', 'Brown', 'Brown', 'Brown', 'Blue', 'Blue', 'Blue'],
    },
    {
      label: 'Quiz 3',
      values: ['Female', 'Female', 'Female', 'Male', 'Female', 'Male', 'Male', 'Male'],
    },
  ],
};

var data = [ trace1 ];

var layout = {width: 600};

Plotly.newPlot('myDiv', data, layout);

When I hover over a path the full path from ‘Quiz 1’ to ‘Quiz 3’ highlights but what I’d like is for only the path between ‘Quiz 1’ to ‘Quiz 2’ to highlight. I tried hover on but nothing changed.

This is the fiddle

var trace1 = {
  type: 'parcats',
  hoveron: 'color',
  dimensions: [
    {
      label: 'Quiz 1',
      values: ['Black', 'Black', 'Black', 'Brown', 'Brown', 'Brown', 'Red', 'Brown'],
    },
    {
      label: 'Quiz 2',
      values: ['Brown', 'Brown', 'Brown', 'Brown', 'Brown', 'Blue', 'Blue', 'Blue'],
    },
    {
      label: 'Quiz 3',
      values: ['Female', 'Female', 'Female', 'Male', 'Female', 'Male', 'Male', 'Male'],
    },
  ],
};

var data = [ trace1 ];

var layout = {width: 600};

Plotly.newPlot('myDiv', data, layout);
<head>
  <!-- Plotly.js -->
    <script src="https://cdn.plot.ly/plotly-latest.min.js"></script>
</head>

<body>
  <div id="myDiv"></div>
</body>

Is there a way to customize the hover functionality?


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