Rectangular binning with d3-heatmap based on d3-hexbin demo
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March 2, 2016 14:50
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d3-heatmap
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
| <script src="https://cdn.rawgit.com/fabid/d3-heatmap/master/heatmap.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| svg { width:100%; height: 100% } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| var margin = { | |
| top: 0, | |
| right: 0, | |
| bottom: 0, | |
| left: 0 | |
| }, | |
| width = 960 - margin.left - margin.right, | |
| height = 500 - margin.top - margin.bottom; | |
| var randomX = d3.random.normal(width / 2, 80), | |
| randomY = d3.random.normal(height / 2, 80), | |
| points = d3.range(1000).map(function() { | |
| return [randomX(), randomY()]; | |
| }); | |
| console.log(points); | |
| var size = 4; | |
| var heatmap = d3.heatmap() | |
| .std(5) | |
| .dx(size) | |
| .dy(size); | |
| // the result of the heatmap layout | |
| var heatmapData = heatmap(points); | |
| var color = d3.scale.linear() | |
| .domain([0, d3.max(heatmapData, function(d) { | |
| return d.v; | |
| })]) | |
| .range(["white", "steelblue"]) | |
| .interpolate(d3.interpolateLab); | |
| var x = d3.scale.identity() | |
| .domain([0, width]); | |
| var y = d3.scale.linear() | |
| .domain([0, height]) | |
| .range([height, 0]); | |
| var yinv = d3.scale.linear() | |
| .domain([height, 0]) | |
| .range([height, 0]); | |
| 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") | |
| .selectAll(".square") | |
| .data(heatmapData) | |
| .enter().append("rect") | |
| .attr("class", "square") | |
| .attr("x", function(d) { return x(d.x); }) | |
| .attr("y", function(d) { return y(d.y) - yinv(size); }) | |
| .attr("width", x(size)) | |
| .attr("height", yinv(size)) | |
| .style("fill", function(d) { | |
| return color(d.v) | |
| }) | |
| .style("stroke", "none"); | |
| </script> | |
| </body> |
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