Sample 1-dimensional frequency distribution by drawing one semitransparent rectangle for each data point. Adapted from mbostock's block.
Created
April 14, 2016 13:54
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1D Frequency Distribution Using Semitransparency
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| license: gpl-3.0 | |
| height: 100 |
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| <!DOCTYPE html> | |
| <html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| font: 10px sans-serif; | |
| } | |
| .bar rect { | |
| fill: black; | |
| shape-rendering: crispEdges; | |
| } | |
| .axis path, .axis line { | |
| fill: none; | |
| stroke: #000; | |
| shape-rendering: crispEdges; | |
| } | |
| </style> | |
| <body> | |
| <script src="https://d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| // Generate a Bates distribution of 10 random variables. | |
| var values = d3.range(250).map(d3.random.bates(10)); | |
| // A formatter for counts. | |
| var formatCount = d3.format(",.0f"); | |
| var barWidth = 10; | |
| var margin = {top: 10, right: 30, bottom: 30, left: 30}, | |
| width = 960 - margin.left - margin.right, | |
| height = 100 - margin.top - margin.bottom; | |
| var x = d3.scale.linear() | |
| .domain([0, 1]) | |
| .range([0, width]); | |
| var xAxis = d3.svg.axis() | |
| .scale(x) | |
| .orient("bottom"); | |
| 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 + ")"); | |
| var bar = svg.selectAll(".bar") | |
| .data(values) | |
| .enter().append("g") | |
| .attr("class", "bar") | |
| .attr("transform", function(d) { return "translate(" + x(d) + ",0)"; }); | |
| bar.append("rect") | |
| .attr("x", -barWidth/2) | |
| .attr("width", barWidth ) | |
| .attr("height", 50) | |
| .style("opacity", 0.1) | |
| svg.append("g") | |
| .attr("class", "x axis") | |
| .attr("transform", "translate(0," + height + ")") | |
| .call(xAxis); | |
| </script> | |
| </body> | |
| </html> |
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