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")
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.