2019년 2월 1일 금요일

[Markdown] Vega-Lite Examples


1. Vega-Lite Bar Chart Example (1)

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<!DOCTYPE html>
<html>
  <head>
    <title>Vega-Lite Bar Chart</title>
    <meta charset="utf-8" />

    <script src="https://cdn.jsdelivr.net/npm/vega@4.4.0/build/vega.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/vega-lite@3.0.0-rc12/build/vega-lite.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/vega-embed@3.29.1/build/vega-embed.js"></script>

    <style media="screen">
      /* Add space between Vega-Embed links  */
      .vega-actions a {
        margin-right: 5px;
      }
    </style>
  </head>
  <body>
    <h1>Template for Embedding Vega-Lite Visualization</h1>
    <!-- Container for the visualization -->
    <div id="vis"></div>

    <script>
      // Assign the specification to a local variable vlSpec.
      var vlSpec = {
        $schema: 'https://vega.github.io/schema/vega-lite/v3.json',
        data: {
          values: [
            {a: 'C', b: 2},
            {a: 'C', b: 7},
            {a: 'C', b: 4},
            {a: 'D', b: 1},
            {a: 'D', b: 2},
            {a: 'D', b: 6},
            {a: 'E', b: 8},
            {a: 'E', b: 4},
            {a: 'E', b: 7}
          ]
        },
        mark: 'bar',
        encoding: {
          y: {field: 'a', type: 'nominal'},
          x: {
            aggregate: 'average',
            field: 'b',
            type: 'quantitative',
            axis: {
              title: 'Average of b'
            }
          }
        }
      };

      // Embed the visualization in the container with id `vis`
      vegaEmbed('#vis', vlSpec);
    </script>
  </body>
</html>


Output:



2. Vega-Lite Bar Chart Example (2)


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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <script src="script/vega.js"></script>
  <script src="script/vega-lite.js"></script>
  <script src="script/vega-embed.js"></script>
  <style media="screen">
      /* Add space between Vega-Embed links  */
      .vega-actions a {
        margin-right: 5px;
      }
  </style>
  <script>
    function readSingleFile(e) {
    var file = e.target.files[0];
    if (!file) {
      return;
    }
    var reader = new FileReader();
    reader.onload = function(e) {
      var contents = e.target.result;
      displayContents(contents);
    };
      reader.readAsText(file);
    }
  </script>
</head>

<body>  
  <div id="vis"></div>
  
  <script>
  var spec = //readSingleFile("vega_demo_2.json");
  {
  "$schema": "https://vega.github.io/schema/vega-lite/v3.json",
  "description": "A simple bar chart with embedded data.",
  "width": 360,
  "data": {
    "values": [
      {"a": "A","b": 28}, {"a": "B","b": 55}, {"a": "C","b": 43},
      {"a": "D","b": 91}, {"a": "E","b": 81}, {"a": "F","b": 53},
      {"a": "G","b": 19}, {"a": "H","b": 87}, {"a": "I","b": 52}
    ]
  },
  "mark": "bar",
  "encoding": {
    "x": {"field": "a", "type": "ordinal"},
    "y": {"field": "b", "type": "quantitative"},
    "tooltip": {"field": "b", "type": "quantitative"}
  }
  };
  vegaEmbed('#vis', spec)
  </script>
</body>
</html>

Output:



3. Vega-Lite Line Chart Example 


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"mark": "line",

Output:


4. Vega-Lite Area Chart Example 


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"mark": "area",

Output:







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