Independent Data Visualisation Designer
Public
Edited
Jan 25, 2023
3 stars
chart = {
replay;
const nodes = pack().leaves();
const simulation = d3.forceSimulation(nodes)
.force("x", d3.forceX(width / 2).strength(0.01))
.force("y", d3.forceY(height / 2).strength(0.04))
.force("cluster", forceCluster())
.force("collide", forceCollide());
const svg = d3.select(DOM.svg(width, height));
const node = svg.append("g")
.selectAll("circle")
.data(nodes)
.join("circle")
.attr("cx", d => d.x)
.attr("cy", d => d.y)
.attr("fill", d => color(d.data[groupBy]))
.attr("stroke", "white")
.call(drag(simulation));
node.transition()
.delay((d, i) => Math.random() * 500)
.duration(750)
.attrTween("r", d => {
const i = d3.interpolate(0, d.r);
return t => d.r = i(t);
});
simulation.on("tick", () => {
node
.attr("cx", d => d.x)
.attr("cy", d => d.y);
});
invalidation.then(() => simulation.stop());
return svg.node();
}
function forceCluster() {
const strength = 0.2;
let nodes;
function force(alpha) {
const centroids = d3.rollup(nodes, centroid, d => d.data[groupBy]);
const l = alpha * strength;
for (const d of nodes) {
const {x: cx, y: cy} = centroids.get(d.data[groupBy]);
d.vx -= (d.x - cx) * l;
d.vy -= (d.y - cy) * l;
}
}
force.initialize = _ => nodes = _;
return force;
}
pack = () => d3.pack()
.size([width, height])
.padding(1)
(hierarchicalData
.sum(d => d.size))
dataRaw = FileAttachment("activitiesNarrow.csv").csv()
groups = [... new Set(dataStandardised.map(d => d.group))]
dataWithImpliedHierarchy = dataStandardised.concat(impliedHierarchy)
stratify = d3.stratify()
.id(d => d.id)
.parentId(d => d.group)
hierarchicalData = stratify(dataWithImpliedHierarchy)
function centroid(nodes) {
let x = 0;
let y = 0;
let z = 0;
for (const d of nodes) {
let k = d.r ** 2;
x += d.x * k;
y += d.y * k;
z += k;
}
return {x: x / z, y: y / z};
}
drag = simulation => {
function dragstarted(event, d) {
if (!event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(event, d) {
d.fx = event.x;
d.fy = event.y;
}
function dragended(event, d) {
if (!event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}
return d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended);
}
color = d3.scaleOrdinal(d3.extent(groups), d3.schemeCategory10)
height = 800
d3 = require("d3@6")
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