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Binary Step Plot
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| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Step Graph</title> | |
| <style> | |
| path.steps { | |
| stroke: #000; | |
| stroke-width: 3; | |
| fill: none; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js" charset="utf-8"></script> | |
| <script src="./step.js" charset="utf-8"></script> | |
| <script> | |
| var data = [1,0,0,1,1,1,0,0,1,1,0,1,0,1,1,1,1,0,1,0,1,0,0,0]; | |
| var chart = step() | |
| .width(700) | |
| .height(50) | |
| .margin({top: 10, left: 5, right: 5, bottom: 10}); | |
| d3.select("body") | |
| .datum(data) | |
| .call(chart); | |
| </script> | |
| </body> | |
| </html> |
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| var step = function() { | |
| var margin = {top: 0, right: 0, bottom: 0, left: 0}, | |
| width = 500, | |
| height = 200; | |
| function coordinates(data) { | |
| var Δx = width / data.length; | |
| var coords = []; | |
| data.forEach(function(d, i) { | |
| var start = d === 1 ? {x: i* Δx, y: 0} : {x: i*Δx, y: height}, | |
| end = {x: start.x + Δx, y: start.y}; | |
| coords.push(start); | |
| coords.push(end); | |
| }); | |
| return coords; | |
| } | |
| function chart(selection) { | |
| selection.each(function(data) { | |
| var svg = d3.select(this).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 line = d3.svg.line() | |
| .x(function(d) { return d.x; }) | |
| .y(function(d) { return d.y; }) | |
| .interpolate("linear"); | |
| var coords = coordinates(data); | |
| console.log(coords); | |
| svg.append("path") | |
| .attr("d", line(coords)) | |
| .attr("class", "steps"); | |
| }); | |
| } | |
| chart.margin = function(_) { | |
| if (!arguments.length) return undefined; | |
| margin = _; | |
| return chart; | |
| } | |
| chart.width = function(_) { | |
| if (!arguments.length) return undefined; | |
| width = _; | |
| return chart; | |
| } | |
| chart.height = function(_) { | |
| if (!arguments.length) return undefined; | |
| height = _; | |
| return chart; | |
| } | |
| return chart; | |
| } |
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