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Histogram (D3)
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Histogram</title> | |
| <script type="text/javascript" src="https://github.com/mbostock/d3/raw/v1.17.0/d3.js"></script> | |
| <script type="text/javascript" src="https://github.com/mbostock/d3/raw/v1.17.0/d3.layout.js"></script> | |
| <style type="text/css"> | |
| body { | |
| font: 10px sans-serif; | |
| } | |
| rect { | |
| fill: steelblue; | |
| stroke: white; | |
| } | |
| line { | |
| stroke: black; | |
| shape-rendering: crispEdges; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script type="text/javascript"> | |
| var n = 10000, // number of trials | |
| m = 10, // number of random variables | |
| data = []; | |
| // Generate an Irwin-Hall distribution. | |
| for (var i = 0; i < n; i++) { | |
| for (var s = 0, j = 0; j < m; j++) { | |
| s += Math.random(); | |
| } | |
| data.push(s); | |
| } | |
| console.log(data); | |
| var w = 400, | |
| h = 400; | |
| var histogram = d3.layout.histogram() | |
| (data); | |
| var x = d3.scale.ordinal() | |
| .domain(histogram.map(function(d) { return d.x; })) | |
| .rangeRoundBands([0, w]); | |
| var y = d3.scale.linear() | |
| .domain([0, d3.max(histogram, function(d) { return d.y; })]) | |
| .range([0, h]); | |
| var vis = d3.select("body").append("svg:svg") | |
| .attr("width", w) | |
| .attr("height", h) | |
| .append("svg:g") | |
| .attr("transform", "translate(.5)"); | |
| vis.selectAll("rect") | |
| .data(histogram) | |
| .enter().append("svg:rect") | |
| .attr("transform", function(d) { return "translate(" + x(d.x) + "," + (h - y(d.y)) + ")"; }) | |
| .attr("width", x.rangeBand()) | |
| .attr("y", function(d) { return y(d.y); }) | |
| .attr("height", 0) | |
| .transition() | |
| .duration(750) | |
| .attr("y", 0) | |
| .attr("height", function(d) { return y(d.y); }); | |
| vis.append("svg:line") | |
| .attr("x1", 0) | |
| .attr("x2", w) | |
| .attr("y1", h) | |
| .attr("y2", h); | |
| </script> | |
| </body> | |
| </html> |
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