A demonstration of the d3-hexbin plugin for D3 4.0.
Last active
March 9, 2019 16:58
Hexagonal Binning
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| license: gpl-3.0 | |
| redirect: https://observablehq.com/@d3/hexbin |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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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.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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