md`# Figurings`
d3 = require("d3@5")
// I only claim the changes made to this original template are mine. Please see history to validate.
// Template code; see below for mine
chart = {
//const links = data.links.map(d => Object.create(d));
//const nodes = data.nodes.map(d => Object.create(d));
// The `links` array contains objects with a `source` and a `target`
// property. The values of those properties are the indices in
// the `nodes` array of the two endpoints of the link.
var links = [
{source: "mental", target: "Topic 4" },
{source: "people", target: "Topic 4" },
{source: "drug", target: "Topic 4" },
{source: "ill", target: "Topic 4" },
{source: "health", target: "Topic 4" },
{source: "problem", target: "Topic 4" },
{source: "use", target: "Topic 4" },
{source: "issue", target: "Topic 4" },
{source: "cause", target: "Topic 4" },
{source: "suicide", target: "Topic 4" },
{source: "depression", target: "Topic 4" },
{source: "gun", target: "Topic 4" },
{source: "violence", target: "Topic 4" }
];
const simulation = d3.forceSimulation(nodes)
.force("link", d3.forceLink(links).id(d => d.name))
.force("charge", d3.forceManyBody().strength(-200))
.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 text = svg.selectAll("text").data(nodes).join("text")
.text(function(d) { return d.name })
/* const node = svg.append("g")
.attr("stroke", "#fff")
.attr("stroke-width", 1.5)
.selectAll("circle")
.data(nodes)
.join("circle")
.attr("r", 8)
.attr("fill", "red") //Change the color here
svg.selectAll("circle")
.call(drag(simulation));
node.append("title")
.text(d => d.name);
const text = svg.append("g")
.attr("stroke", "#000")
.attr("stroke-width", 1.5)
.selectAll("text")
.data(nodes)
.join("text")
.attr("dx", 0)
.attr("dy", ".35em")
.text(function(d) { return d.name })
.call(drag(simulation));
node.append("text")
.text(function(d) { return d.name }); */
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
.attr("cx", d => d.x)
.attr("cy", d => d.y);*/
text
.attr("x", d => d.x)
.attr("y", d => d.y);
});
invalidation.then(() => simulation.stop());
return svg.node();
}
width = 800
height =300
drag = simulation => {
function dragstarted(d) {
if (!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}
function dragended(d) {
if (!d3.event.active) simulation.alphaTarget(0);
d.fx = d.x;
d.fy = d.y;
}
return d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended);
}
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