chart = {
const svg = d3.create("svg")
.attr("viewBox", [-width / 2, -height / 2, width, height]);
const simulation = d3.forceSimulation()
.force("charge", d3.forceManyBody().strength(-1000))
.force("link", d3.forceLink().id(d => d.id).distance(200))
.force("x", d3.forceX())
.force("y", d3.forceY())
.on("tick", ticked);
let link = svg.append("g")
.attr("stroke", "#000")
.attr("stroke-width", 1.5)
.selectAll("line");
let node = svg.append("g")
.attr("stroke", "#fff")
.attr("stroke-width", 1.5)
.selectAll("circle");
function ticked() {
node.attr("cx", d => d.x)
.attr("cy", d => d.y)
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);
}
// Terminate the force layout when this cell re-runs.
invalidation.then(() => simulation.stop());
return Object.assign(svg.node(), {
update({nodes, links}) {
// Make a shallow copy to protect against mutation, while
// recycling old nodes to preserve position and velocity.
const old = new Map(node.data().map(d => [d.id, d]));
nodes = nodes.map(d => Object.assign(old.get(d.id) || {}, d));
links = links.map(d => Object.assign({}, d));
node = node
.data(nodes, d => d.id)
.join(enter => enter.append("circle")
.attr("r", 8)
.attr("fill", d => color(d.id)));
link = link
.data(links, d => [d.source, d.target])
.join("line");
simulation.nodes(nodes);
simulation.force("link").links(links);
simulation.alpha(1).restart();
}
});
}
chart.update(graph)
graph1 = ({
nodes: [
{id: "a"},
{id: "b"},
{id: "c"}
],
links: []
})
graph2 = ({
nodes: [
{id: "a"},
{id: "b"},
{id: "c"}
],
links: [
{source: "a", target: "b"},
{source: "b", target: "c"},
{source: "c", target: "a"}
]
})
graph3 = ({"nodes":[{"id":0},{"id":1},{"id":2},{"id":3},{"id":4},{"id":5},{"id":6},{"id":7},{"id":8},{"id":9},{"id":10},{"id":11}],"links":[{"source":0,"target":0},{"source":1,"target":0},{"source":1,"target":1},{"source":2,"target":0},{"source":2,"target":1},{"source":2,"target":2},{"source":3,"target":0},{"source":3,"target":1},{"source":3,"target":3},{"source":4,"target":1},{"source":4,"target":3},{"source":4,"target":4},{"source":5,"target":1},{"source":5,"target":4},{"source":5,"target":5},{"source":6,"target":1},{"source":6,"target":2},{"source":6,"target":6},{"source":7,"target":1},{"source":7,"target":5},{"source":7,"target":6},{"source":7,"target":7},{"source":8,"target":4},{"source":8,"target":5},{"source":8,"target":8},{"source":9,"target":5},{"source":9,"target":7},{"source":9,"target":9},{"source":10,"target":5},{"source":10,"target":8},{"source":10,"target":10},{"source":11,"target":5},{"source":11,"target":9},{"source":11,"target":10},{"source":11,"target":11}]});
color = d3.scaleOrdinal(d3.schemeTableau10)
height = 400
d3 = require("d3@5/dist/d3.js")
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.
