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Drawing a neural network
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| { | |
| "nodes": [ | |
| {"label": "i0", "layer": 1}, | |
| {"label": "i1", "layer": 1}, | |
| {"label": "h0", "layer": 2}, | |
| {"label": "i2", "layer": 1}, | |
| {"label": "h1", "layer": 2}, | |
| {"label": "h2", "layer": 2}, | |
| {"label": "h3", "layer": 2}, | |
| {"label": "o0", "layer": 3} | |
| ] | |
| } |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| text { | |
| pointer-events: none; | |
| } | |
| .node:hover { | |
| stroke: #999; | |
| stroke-opacity: .6; | |
| stroke-width: 4px; | |
| } | |
| .link { | |
| stroke: #999; | |
| stroke-opacity: .6; | |
| } | |
| </style> | |
| <body> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500, | |
| nodeSize = 30; | |
| var color = d3.scale.category20(); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| d3.json("data.json", function(error, graph) { | |
| var nodes = graph.nodes; | |
| // get network size | |
| var netsize = {}; | |
| nodes.forEach(function (d) { | |
| if(d.layer in netsize) { | |
| netsize[d.layer] += 1; | |
| } else { | |
| netsize[d.layer] = 1; | |
| } | |
| d["lidx"] = netsize[d.layer]; | |
| }); | |
| // calc distances between nodes | |
| var largestLayerSize = Math.max.apply( | |
| null, Object.keys(netsize).map(function (i) { return netsize[i]; })); | |
| var xdist = width / Object.keys(netsize).length, | |
| ydist = height / largestLayerSize; | |
| // create node locations | |
| nodes.map(function(d) { | |
| d["x"] = (d.layer - 0.5) * xdist; | |
| d["y"] = (d.lidx - 0.5) * ydist; | |
| }); | |
| // autogenerate links | |
| var links = []; | |
| nodes.map(function(d, i) { | |
| for (var n in nodes) { | |
| if (d.layer + 1 == nodes[n].layer) { | |
| links.push({"source": parseInt(i), "target": parseInt(n), "value": 1}) } | |
| } | |
| }).filter(function(d) { return typeof d !== "undefined"; }); | |
| // draw links | |
| var link = svg.selectAll(".link") | |
| .data(links) | |
| .enter().append("line") | |
| .attr("class", "link") | |
| .attr("x1", function(d) { return nodes[d.source].x; }) | |
| .attr("y1", function(d) { return nodes[d.source].y; }) | |
| .attr("x2", function(d) { return nodes[d.target].x; }) | |
| .attr("y2", function(d) { return nodes[d.target].y; }) | |
| .style("stroke-width", function(d) { return Math.sqrt(d.value); }); | |
| // draw nodes | |
| var node = svg.selectAll(".node") | |
| .data(nodes) | |
| .enter().append("g") | |
| .attr("transform", function(d) { | |
| return "translate(" + d.x + "," + d.y + ")"; } | |
| ); | |
| var circle = node.append("circle") | |
| .attr("class", "node") | |
| .attr("r", nodeSize) | |
| .style("fill", function(d) { return color(d.layer); }); | |
| node.append("text") | |
| .attr("dx", "-.35em") | |
| .attr("dy", ".35em") | |
| .text(function(d) { return d.label; }); | |
| }); | |
| </script> |
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