In response to a Stack Overflow question, How to convert to D3's JSON format?.
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November 8, 2019 07:43
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Force Layout from CSV
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| license: gpl-3.0 |
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| source | target | |
|---|---|---|
| A1 | A2 | |
| A2 | A3 | |
| A2 | A4 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .link { | |
| stroke: #000; | |
| } | |
| .node { | |
| stroke: #fff; | |
| } | |
| </style> | |
| <body> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500; | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var force = d3.layout.force() | |
| .size([width, height]); | |
| d3.csv("graph.csv", function(error, links) { | |
| if (error) throw error; | |
| var nodesByName = {}; | |
| // Create nodes for each unique source and target. | |
| links.forEach(function(link) { | |
| link.source = nodeByName(link.source); | |
| link.target = nodeByName(link.target); | |
| }); | |
| // Extract the array of nodes from the map by name. | |
| var nodes = d3.values(nodesByName); | |
| // Create the link lines. | |
| var link = svg.selectAll(".link") | |
| .data(links) | |
| .enter().append("line") | |
| .attr("class", "link"); | |
| // Create the node circles. | |
| var node = svg.selectAll(".node") | |
| .data(nodes) | |
| .enter().append("circle") | |
| .attr("class", "node") | |
| .attr("r", 4.5) | |
| .call(force.drag); | |
| // Start the force layout. | |
| force | |
| .nodes(nodes) | |
| .links(links) | |
| .on("tick", tick) | |
| .start(); | |
| function tick() { | |
| link.attr("x1", function(d) { return d.source.x; }) | |
| .attr("y1", function(d) { return d.source.y; }) | |
| .attr("x2", function(d) { return d.target.x; }) | |
| .attr("y2", function(d) { return d.target.y; }); | |
| node.attr("cx", function(d) { return d.x; }) | |
| .attr("cy", function(d) { return d.y; }); | |
| } | |
| function nodeByName(name) { | |
| return nodesByName[name] || (nodesByName[name] = {name: name}); | |
| } | |
| }); | |
| </script> |
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This is pretty much exactly what I've been looking for to begin my project of mapping my learning in a concise and meaningful way.
All I need is 1 addition and that is the capacity to include text in the nodes, this is a great starting point thanks.