Hexbins

A demonstration of the d3-hexbin plugin for D3 4.0.

<!DOCTYPE html>
<meta charset="utf-8">
<style>
html, body {
  background: #111;
}

.hexagons {
  fill: none;
  stroke: #000;
}

</style>
<body>
<script src="//d3js.org/d3.v4.js"></script>
<script src="d3-hexbin.js"></script>
<script>

var margin = {top: 12, right: 12, bottom: 12, left: 12},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var randomX = d3.randomBates(2),
    randomY = d3.randomBates(2),
    points = d3.range(2000).map(function() { return [width * randomX(), height * randomY()]; });

var hexbin = d3.hexbin()
    .extent([[-margin.left, -margin.top], [width + margin.right, height + margin.bottom]])
    .radius(10);

var bins = hexbin(points);

var color = d3.scaleSequential(d3.interpolatePlasma)
    .domain([0, 10]);

var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

svg.append("g")
    .attr("class", "hexagons")
  .selectAll("path")
    .data(bins)
  .enter().append("path")
    .attr("d", hexbin.hexagon())
    .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; })
    .style("fill", function(d) { return color(d.length); });

/* Messing with bl.ocks.org styles */
if(window.parent && window.parent.document) {
  window.parent.document.body.style.backgroundColor = "#111"
  window.parent.document.body.style.color = "#fff"
  d3.selectAll(window.parent.document.getElementsByTagName("a")).style("color", "rgb(244, 136, 73)");
}
</script>

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