grey scale matrix

Grey Scale Matrix

Made up data taken from Chapter 10 of How to Lie With Maps by Mark Monmonier.

Stemmed from a discussion on the paper "to bin or not to bin?"

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:10px;position:fixed;top:0;right:0;bottom:0;left:0; }
    svg {
      border: 1px solid #333
    }
    rect {
      stroke: #757575;
      stroke-width: 2;
    }
  </style>
</head>

<body>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
    var svg = d3.select("body").append("svg")
      .attr("width", 280)
      .attr("height", 160);
    
    var cellSize = 40;
    
    var color = d3.scaleLinear()
    	.range(['#fff', '#424242'])
    	.interpolate(d3.interpolateLab);

</script>
</body>

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