Created
January 23, 2014 14:51
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D3.jsでレーダーチャート
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| </head> | |
| <body> | |
| <script> | |
| var radarChart = function(){ | |
| var w = 200, | |
| h = 200, | |
| padding = 20, | |
| svg = d3.select('body') | |
| .append('svg') | |
| .attr('width', w) | |
| .attr('height', h), | |
| dataset = [ | |
| [5, 5, 2, 5, 8, 2, 3], | |
| [2, 1, 5, 2, 5, 6, 7] | |
| ], | |
| paramCount = dataset[0].length, | |
| max = d3.max(d3.merge(dataset)), | |
| rScale = d3.scale.linear() | |
| .domain([0, max]) | |
| .range([0, w/2 - padding]), | |
| grid = (function(){ | |
| var result = []; | |
| for(var i=1; i<=max; i++){ | |
| var arr = []; | |
| for (var j=0; j<paramCount; j++){ | |
| arr.push(i); | |
| } | |
| result.push(arr); | |
| } | |
| return result; | |
| })(), | |
| label = (function(){ | |
| var result = []; | |
| for(var i=0; i<paramCount; i++){ | |
| result.push(max + 1); | |
| } | |
| return result; | |
| })(), | |
| line = d3.svg.line() | |
| .x(function(d, i){ return rScale(d) * Math.cos(2 * Math.PI / paramCount * i - (Math.PI / 2)) + w/2; }) | |
| .y(function(d, i){ return rScale(d) * Math.sin(2 * Math.PI / paramCount * i - (Math.PI / 2)) + w/2; }) | |
| .interpolate('linear'); | |
| svg.selectAll('path') | |
| .data(dataset) | |
| .enter() | |
| .append('path') | |
| .attr('d', function(d){ | |
| return line(d)+"z"; | |
| }) | |
| .attr("stroke", function(d, i){ return d3.scale.category10().range()[i]; }) | |
| .attr("stroke-width", 2) | |
| .attr('fill', 'none'); | |
| svg.selectAll("path.grid") | |
| .data(grid) | |
| .enter() | |
| .append("path") | |
| .attr("d", function(d,i){ | |
| return line(d)+"z"; | |
| }) | |
| .attr("stroke", "black") | |
| .attr("stroke-dasharray", "2") | |
| .attr('fill', 'none'); | |
| svg.selectAll("text") | |
| .data(label) | |
| .enter() | |
| .append('text') | |
| .text(function(d, i){ return i+1; }) | |
| .attr("text-anchor", "middle") | |
| .attr("dominant-baseline", "middle") | |
| .attr('x', function(d, i){ return rScale(d) * Math.cos(2 * Math.PI / paramCount * i - (Math.PI / 2)) + w/2; }) | |
| .attr('y', function(d, i){ return rScale(d) * Math.sin(2 * Math.PI / paramCount * i - (Math.PI / 2)) + w/2; }) | |
| .attr("font-size", "15px"); | |
| }; | |
| radarChart(); | |
| </script> | |
| </body> | |
| </html> |
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