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function drawNodes(nodes, netSpec, designSpec, env) {
var cnt = 0;
var biasLayers = 0;
for (layer=0; layer<designSpec.length; layer++) {
if (designSpec[layer] == "bias") biasLayers++;
}
for (layer=0; layer<netSpec.length; layer++) {
for (node=0; node<netSpec[layer]; node++) {
// dynamic ("responsive") attributes for all window sizes
if (designSpec[layer] == "bias") {
nodes[cnt].x = (layer - biasLayers + 1.25) * (env.width / (netSpec.length - biasLayers));
nodes[cnt].y = (node + 0.25) * (env.height / netSpec[layer]);
nodes[cnt].r = d3.min([env.width, env.height]) / d3.max(netSpec.concat(netSpec.length)) * 0.2;
} else {
nodes[cnt].x = (layer - biasLayers + 0.5) * (env.width / (netSpec.length - biasLayers));
nodes[cnt].y = (node + 0.5) * (env.height / netSpec[layer]);
nodes[cnt].r = d3.min([env.width, env.height]) / d3.max(netSpec.concat(netSpec.length)) * 0.3;
}
cnt++;
}
}
return nodes;
}
function drawLinks(links, weights) {
var cnt = 0;
for (layer=0; layer<weights.length; layer++) {
for (layer2=0; layer2<weights[layer].length; layer2++) {
for (node=0; node<weights[layer][layer2].length; node++) {
links[cnt++].weight = weights[layer][layer2][node];
}
}
}
return links;
}
function createNet(netSpec, designSpec) {
// create layers
var nodes = [];
for (layer=0; layer<netSpec.length; layer++) {
for (node=0; node<netSpec[layer]; node++) {
nodes.push({
id: layer.toString() + "_" + node.toString(),
fixed: true
});
}
}
var nodesMap = d3.map();
nodes.forEach(function (n) {
return nodesMap.set(n.id, n);
});
// create links
var links = [];
for (layer=0; layer<netSpec.length-1; layer++) {
for (src=0; src<netSpec[layer]; src++) {
if (designSpec[layer] == "bias") {
links.push({
source: nodesMap.get(layer.toString() + "_" + src.toString()),
target: nodesMap.get((layer + 1).toString() + "_" + src.toString()),
weight: 1
});
} else {
for (tar=0; tar<netSpec[layer+1]; tar++) {
links.push({
source: nodesMap.get(layer.toString() + "_" + src.toString()),
target: nodesMap.get((layer + 1).toString() + "_" + tar.toString()),
weight: 1
});
}
}
}
}
return {
"nodes": nodes,
"links": links
};
}
// create empty elements and determine the visualisation"s size
var svg = d3.select("#visContainer").append("svg")
.attr("width", "100%")
.attr("height", "100%");
// create network and links
var netSpec = [13, 13, 11, 1],
designSpec = ["bias", "standard", "standard", "standard"];
var net = createNet(netSpec, designSpec);
// create visualisation
function envRedraw(weights, duration) {
// "cache" the values for pure resize events
if (!duration) {
duration = 0;
}
if (!weights) {
weights = this._weigths;
} else {
this._weigths = weights;
}
var width = parseInt(svg.style("width")) || 800,
height = parseInt(svg.style("height")) || 600;
net.nodes = drawNodes(net.nodes, netSpec, designSpec, {"width": width, "height": height});
net.links = drawLinks(net.links, weights);
node = svg.selectAll(".node");
node
.transition()
.duration(duration)
.attr("cx", function(d) { return d.x; })
.attr("cy", function(d) { return d.y; })
.attr("r", function(d) { return d.r; });
link = svg.selectAll(".link");
link
.transition()
.duration(duration)
.style("stroke-width", function(d) { return d.weight * 4; })
.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; });
}
window.addEventListener("resize", envRedraw, true);
var link = svg.selectAll(".link")
.data(net.links)
.enter().append("line")
.attr("class", "link")
.style("stroke", "grey")
.style("stroke-width", function(d) { return d.weight * 4; })
.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; });
var node = svg.selectAll(".node")
.data(net.nodes)
.enter().append("circle")
.attr("class", "node")
.attr("cx", function(d) { return d.x; })
.attr("cy", function(d) { return d.y; })
.attr("r", function(d) { return d.r; });
// now we're getting to the grips
function preload(callback) {
d3.json("data/log.json")
.get(function(e, json) {
if (e) console.log(e);
callback(json);
});
}
var cache = {};
preload(function (json) {
cache = json;
animate();
});
var maxBatch = 8, maxEpoch = 300;
var epochStep = 50;
var numLayers = 3;
var currBatch = 0, currEpoch = 0;
function animate() {
frameDuration = 20000 / (maxBatch * maxEpoch / epochStep);
envRedraw(cache[currBatch][currEpoch], frameDuration);
currEpoch += epochStep;
if (currEpoch >= maxEpoch) {
currEpoch = 0;
console.log("batch " + currBatch.toString());
if (++currBatch >= maxBatch) {
currBatch = 0;
return; // stop
}
}
setTimeout(animate, frameDuration);
}
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