Basic dot-plot using force-directed layout.
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July 16, 2020 05:47
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force basic dot plot
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| license: mit |
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| const width = 1000 | |
| const height = 600 | |
| const svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| const roleScale = d3.scaleOrdinal() | |
| .range(['coral', 'olive', 'skyblue', 'pink']); | |
| let sampleData = d3.range(8).map((d,i) => ({r: 40 - i * 0.5})); | |
| const radiusScale = d3.scaleLinear() | |
| .domain(d3.extent(sampleData, d => d.r)) | |
| .range([20, 50]) | |
| // set params for force layout | |
| const manyBody = d3.forceManyBody().strength(2) | |
| const center = d3.forceCenter().x((width/2)).y((height/2)) | |
| // define force | |
| let force = d3.forceSimulation() | |
| .force('charge', manyBody) | |
| .force('center', center) | |
| .force('collision', d3.forceCollide(d => d.r-4)) | |
| .velocityDecay(.48) | |
| .nodes(sampleData) | |
| .on('tick', changeNetwork) | |
| svg.selectAll('circle') | |
| .data(sampleData) | |
| .enter() | |
| .append('circle') | |
| .attr('class', 'node') | |
| .style('fill', (d,i) => roleScale(i)) | |
| .attr('r', d => radiusScale(d.r)) | |
| function changeNetwork() { | |
| d3.selectAll('circle') | |
| .attr('cx', d => d.x) | |
| .attr('cy', d => d.y) | |
| } | |
| d3.selectAll('circle.node') | |
| .on('mouseover', function() { | |
| d3.select(this) | |
| .style('stroke', 'black') | |
| .style('stroke-width', 4) | |
| .raise() | |
| }) | |
| .on('mouseout', function() { | |
| d3.select(this) | |
| .style('stroke-width', 0) | |
| }) | |
| </script> | |
| </body> |
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