// chart = {
// // Specify the dimensions of the chart.
// const width = 928;
// const height = 600;
// // Specify the color scale.
// const color = d3.scaleOrdinal(d3.schemeCategory10);
// // The force simulation mutates links and nodes, so create a copy
// // so that re-evaluating this cell produces the same result.
// const links = data.links.map(d => ({...d}));
// const nodes = data.nodes.map(d => ({...d}));
// // Create a simulation with several forces.
// const simulation = d3.forceSimulation(nodes)
// .force("link", d3.forceLink(links).id(d => d.id))
// .force("charge", d3.forceManyBody())
// .force("center", d3.forceCenter(width / 2, height / 2))
// .on("tick", ticked);
// // Create the SVG container.
// const svg = d3.create("svg")
// .attr("width", width)
// .attr("height", height)
// .attr("viewBox", [0, 0, width, height])
// .attr("style", "max-width: 100%; height: auto;");
// // Add a line for each link, and a circle for each node.
// const link = svg.append("g")
// .attr("stroke", "#999")
// .attr("stroke-opacity", 0.6)
// .selectAll()
// .data(links)
// .join("line")
// .attr("stroke-width", d => Math.sqrt(d.value));
// const node = svg.append("g")
// .attr("stroke", "#fff")
// .attr("stroke-width", 1.5)
// .selectAll()
// .data(nodes)
// .join("circle")
// .attr("r", 5)
// .attr("fill", d => color(d.group));
// node.append("title")
// .text(d => d.id);
// // Add a drag behavior.
// node.call(d3.drag()
// .on("start", dragstarted)
// .on("drag", dragged)
// .on("end", dragended));
// // Set the position attributes of links and nodes each time the simulation ticks.
// function ticked() {
// 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
// .attr("cx", d => d.x)
// .attr("cy", d => d.y);
// }
// // Reheat the simulation when drag starts, and fix the subject position.
// function dragstarted(event) {
// if (!event.active) simulation.alphaTarget(0.3).restart();
// event.subject.fx = event.subject.x;
// event.subject.fy = event.subject.y;
// }
// // Update the subject (dragged node) position during drag.
// function dragged(event) {
// event.subject.fx = event.x;
// event.subject.fy = event.y;
// }
// // Restore the target alpha so the simulation cools after dragging ends.
// // Unfix the subject position now that it’s no longer being dragged.
// function dragended(event) {
// if (!event.active) simulation.alphaTarget(0);
// event.subject.fx = null;
// event.subject.fy = null;
// }
// // When this cell is re-run, stop the previous simulation. (This doesn’t
// // really matter since the target alpha is zero and the simulation will
// // stop naturally, but it’s a good practice.)
// invalidation.then(() => simulation.stop());
// return svg.node();
// }
chart = {
// Specify the dimensions of the chart.
const width = 928;
const height = 600;
// Specify the color scale.
const color = d3.scaleOrdinal(d3.schemeCategory10);
// The force simulation mutates links and nodes, so create a copy
// so that re-evaluating this cell produces the same result.
const links = data.links.map(d => ({...d}));
const nodes = data.nodes.map(d => ({...d}));
// Create a simulation with several forces.
const simulation = d3.forceSimulation(nodes)
.force("link", d3.forceLink(links).id(d => d.id))
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width / 2, height / 2))
.on("tick", ticked);
// Create the SVG container.
const svg = d3.create("svg")
.attr("width", width)
.attr("height", height)
.attr("viewBox", [0, 0, width, height])
.attr("style", "max-width: 100%; height: auto;");
// Add a line for each link, and a circle for each node.
const link = svg.append("g")
.attr("stroke", "#999")
.attr("stroke-opacity", 0.6)
.selectAll()
.data(links)
.join("line")
.attr("stroke-width", d => Math.sqrt(d.value));
// Append a group element for each node
const nodeGroup = svg.append("g")
.attr("class", "nodes")
.selectAll("g")
.data(nodes)
.enter()
.append("g")
.attr("class", "node-group")
.call(drag(simulation));
// Append a rounded chip for each node
const node = nodeGroup.append("rect")
.attr("class", "node")
.attr("width", 80)
.attr("height", 40)
.attr("rx", 20)
.attr("ry", 20)
.attr("fill", d => color(d.group));
// Append text label for each node
const label = nodeGroup.append("text")
.attr("class", "node-label")
.attr("text-anchor", "middle")
.attr("alignment-baseline", "middle")
.text(d => d.id)
.style("font-size", "12px")
.style("fill", "white");
node.append("title")
.text(d => d.id);
// Add a drag behavior.
function 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);
}
// Set the position attributes of links and nodes each time the simulation ticks.
function ticked() {
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);
nodeGroup.attr("transform", d => `translate(${d.x},${d.y})`);
}
// When this cell is re-run, stop the previous simulation. (This doesn’t
// really matter since the target alpha is zero and the simulation will
// stop naturally, but it’s a good practice.)
invalidation.then(() => simulation.stop());
return svg.node();
}
data = FileAttachment("miserables.json").json()
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