here to learn
viewof name = {
const form = text({placeholder: "Node Name", description: "This will create a new node and attach it to another randomly", submit: "Create"});
form.addEventListener('submit', () => {
const name = form.value;
data.nodes.push({id: name, group: 1});
data.links.push({source: name, target:'MotherPlutarch', value: 1});
});
return form;
}
chart = {
const svg = this ? d3.select(this) : d3.select(DOM.svg(width, height));
const link = svg.selectAll('g.link').data([links]).join("g")
.classed('link',true)
.attr("stroke", "#999")
.attr("stroke-opacity", 0.6)
.selectAll("line")
.data(d => d)
.join("line")
.attr("stroke-width", d => Math.sqrt(d.value));
const node = svg.selectAll('g.node').data([nodes]).join("g")
.classed('node',true)
.attr("stroke", "#fff")
.attr("stroke-width", 1.5)
.selectAll("circle")
.data(d => d)
.join("circle")
.attr("r", 5)
.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
.attr("cx", d => d.x)
.attr("cy", d => d.y);
});
return svg.node();
}
nodes = {
name;
return data.nodes.map((d,i) => (this && this[i]) || Object.create(d));
}
links = {
name;
return data.links.map((d,i) => (this && this[i]) || Object.create(d));
}
simulation = {
name;
return ((this && this.nodes(nodes)) || d3.forceSimulation(nodes))
.force("link", d3.forceLink(links).id(d => d.id))
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width / 2, height / 2))
.alpha(1).restart();
}
data = d3.json("https://gist.githubusercontent.com/mbostock/4062045/raw/5916d145c8c048a6e3086915a6be464467391c62/miserables.json")
height = 600
color = {
const scale = d3.scaleOrdinal(d3.schemeCategory10);
return d => scale(d.group);
}
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 = null;
d.fy = null;
}
return d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended);
}
d3 = require("d3@5")
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.
