A demonstration of the d3-hexbin plugin for D3 4.0.
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Hexagonal Binning
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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <svg width="960" height="500"></svg> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="https://d3js.org/d3-hexbin.v0.2.min.js"></script> | |
| <script> | |
| var svg = d3.select("svg"), | |
| margin = {top: 40, right: 20, bottom: 20, left: 40}, | |
| width = +svg.attr("width") - margin.left - margin.right, | |
| height = +svg.attr("height") - margin.top - margin.bottom, | |
| g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
| var randomX = d3.randomNormal(width / 2, 80), | |
| randomY = d3.randomNormal(height / 2, 80), | |
| points = d3.range(10000).map(function() { return [randomX(), 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.interpolateMagma) | |
| .domain([d3.max(bins, function(d) { return d.length; }), 0]); | |
| g.append("g") | |
| .attr("fill", "none") | |
| .attr("stroke", "#fff") | |
| .attr("stroke-opacity", 0.5) | |
| .selectAll("path") | |
| .data(bins) | |
| .enter().append("path") | |
| .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; }) | |
| .attr("fill", function(d) { return color(d.length); }) | |
| .attr("d", hexbin.hexagon()); | |
| g.append("g") | |
| .call(d3.axisTop(d3.scaleIdentity().domain([0, width]))); | |
| g.append("g") | |
| .call(d3.axisLeft(d3.scaleIdentity().domain([0, height]))); | |
| </script> |
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