chart = {
const links = data.links.map(d => Object.create(d));
const nodes = data.nodes.map(d => Object.create(d));
const simulation = d3.forceSimulation(nodes)
.force("link", d3.forceLink(links).id(d => d.id))
.force("charge", d3.forceManyBody())
.force('collision', d3.forceCollide().radius(30))
.force("center", d3.forceCenter(width / 2, height / 2));
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height]);
const link = svg.append("g")
.attr("stroke", "#999")
.attr("stroke-opacity", 0.6)
.selectAll("line")
.data(links)
.join("line")
.attr("stroke-width", d => Math.sqrt(d.value));
const node_g = svg.append("g")
.selectAll("g")
.data(nodes)
.join("g").call(drag(simulation));
const node = node_g.append("rect")
.attr("width", 20)
.attr("height", 20)
.attr("fill", color);
node_g.append("text")
.text(d => d.id)
.attr("font-family", "sans-serif")
.attr("font-size", "12px")
.attr("fill", color);
//.attr("dy", 2);
console.log(node) ;
// const node = svg.append("g")
// .attr("stroke", "#fff")
// .attr("stroke-width", 1.5)
// .selectAll("rect")
// .data(nodes)
// .join("rect")
// .attr("width", 10)
// .attr("height", 10)
// .attr("fill", color)
// .call(drag(simulation));
// node.append("title")
// .text(d => d.id);
simulation.on("tick", () => {
link
.attr("x1", d => d.source.x)
.attr("y1", d => d.source.y)
.attr("x2", d => d.target.x)
.attr("y2", d => d.target.y);
node_g
.attr("transform" , d => `translate( ${d.x}, ${d.y} )`);
//.attr("x", d => d.x)
//.attr("y", d => d.y);
});
invalidation.then(() => simulation.stop());
return svg.node();
}
data = FileAttachment("miserables.json").json()
height = 600
color = {
const scale = d3.scaleOrdinal(d3.schemeCategory10);
return d => scale(d.group);
}
drag = simulation => {
function dragstarted(event) {
if (!event.active) simulation.alphaTarget(0.3).restart();
event.subject.fx = event.subject.x;
event.subject.fy = event.subject.y;
}
function dragged(event) {
event.subject.fx = event.x;
event.subject.fy = event.y;
}
function dragended(event) {
if (!event.active) simulation.alphaTarget(0);
event.subject.fx = null;
event.subject.fy = null;
}
return d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended);
}
d3 = require("d3@6")
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
