G2 - The Grammar Of Graphics

热力或色块图 / 二维正太分布函数热力图

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源码

<!DOCTYPE html>
  <html>
    <head>
      <meta charset="utf-8">
      <title>二维正太分布函数热力图</title>
      <link rel="stylesheet" href="https://os.alipayobjects.com/s/prod/g2/static/doc-b57e62881a0344ecde9e68c4ce312143.css"/>
      
      <script src="https://a.alipayobjects.com/jquery/jquery/1.11.1/jquery.js"></script>

<script src="https://a.alipayobjects.com/g/datavis/g2/2.2.1/g2.js"></script>
    </head>
    <body>
      <div id="c1"></div>
      
      <script>
//二维正太分布函数
function normal(x,y){
  return (1/(2*Math.PI))*Math.exp((-1/2)*(x*x + y*y));
}
var data = [];
for (var i = 0; i < 500; i++) {
  var x = ((Math.random() * 950) >> 0) + 50;
  var y = (Math.random() * 460) >> 0;
  var c = normal((x - 500) / 80, (y - 250) / 40) * 10000 >> 0;
  data.push({
    g: x,
    l :y,
    tmp: c
  });
}
var Stat = G2.Stat;
var chart = new G2.Chart({
  id: 'c1',
  width: 1000,
  height: 500
});
chart.source(data); // 服从二维正太分布的样本数据
chart.heatmap().position(Stat.smooth.loess.gaussian('g*l*tmp', 0.03)).color('tmp', '#233284-#FCE89A-#8A1D25');
chart.render();
</script>

</body>
  </html>

<script src="https://a.alipayobjects.com/g/datavis/g2/2.2.1/g2.js"></script>
      <script>
        G2.Global.setTheme('dark');
      </script>
    </head>
    <body>
      <div id="c1"></div>
      <script>
//二维正太分布函数
function normal(x,y){
  return (1/(2*Math.PI))*Math.exp((-1/2)*(x*x + y*y));
}
var data = [];
for (var i = 0; i < 500; i++) {
  var x = ((Math.random() * 950) >> 0) + 50;
  var y = (Math.random() * 460) >> 0;
  var c = normal((x - 500) / 80, (y - 250) / 40) * 10000 >> 0;
  data.push({
    g: x,
    l :y,
    tmp: c
  });
}
var Stat = G2.Stat;
var chart = new G2.Chart({
  id: 'c1',
  width: 1000,
  height: 500
});
chart.source(data); // 服从二维正太分布的样本数据
chart.heatmap().position(Stat.smooth.loess.gaussian('g*l*tmp', 0.03)).color('tmp', '#233284-#FCE89A-#8A1D25');
chart.render();
</script>

</body>
  </html>