radialTree = {
const svg = d3.select(DOM.svg(width, width))
.style("width", "100%")
.style("height", "auto")
.style("padding", "10px")
.style("box-sizing", "border-box")
.style("font", "13px sans-serif");
const g = svg.append("g");
const linkgroup = g.append("g")
.attr("fill", "none")
.attr("stroke", "#3182bd")
.attr("stroke-opacity", 0.4)
.attr("stroke-width", 0.5);
const nodegroup = g.append("g")
.attr("stroke-linejoin", "round")
.attr("stroke-width", 3);
function newdata (animate = true) {
let root = tree(data);
let links_data = root.links();
let links = linkgroup
.selectAll("path")
.data(links_data, d => d.source.data.name+"_"+d.target.data.name);
links.exit().remove();
let newlinks = links
.enter()
.append("path")
.attr("d", d3.linkRadial()
.angle(d => d.x)
.radius(0.1));
let t = d3.transition()
.duration(animate ? 400 : 0)
.ease(d3.easeLinear)
.on("end", function() {
const box = g.node().getBBox();
svg.transition().duration(1000).attr("viewBox", `${box.x} ${box.y} ${box.width} ${box.height}`);
});
let alllinks = linkgroup.selectAll("path")
alllinks
.transition(t)
.attr("d", d3.linkRadial()
.angle(d => d.x)
.radius(d => d.y));
let nodes_data = root.descendants().reverse();
let nodes = nodegroup
.selectAll("g")
.data(nodes_data, function (d) {
if (d.parent) {
return d.parent.data.name+d.data.name;
}
return d.data.name});
nodes.exit().remove();
let newnodes = nodes
.enter().append("g");
let allnodes = animate ? nodegroup.selectAll("g").transition(t) : nodegroup.selectAll("g");
allnodes
.attr("transform", d => `
rotate(${d.x * 180 / Math.PI - 90})
translate(${d.y},0)
`);
newnodes.append("circle")
.attr("r", 4.5)
.on ("click", function (d) {
let altChildren = d.data.altChildren || [];
let children = d.data.children;
d.data.children = altChildren;
d.data.altChildren = children;
newdata ();
});
nodegroup.selectAll("g circle").attr("fill", function (d) {
let altChildren = d.data.altChildren || [];
let children = d.data.children;
return d.children || (children && (children.length > 0 || altChildren.length > 0)) ? "#3182bd" : "grey" } );
newnodes.append("text")
.attr("dy", "0.31em")
.text(d => d.data.name.substring(0, 30))
.clone(true).lower()
.attr("stroke", "white");
nodegroup.selectAll("g text")
.attr("x", d => d.x < Math.PI === !d.children ? 6 : -6)
.attr("text-anchor", d => d.x < Math.PI === !d.children ? "start" : "end")
.attr("transform", d => d.x >= Math.PI ? "rotate(180)" : null);
}
newdata (false);
document.body.appendChild(svg.node());
const box = g.node().getBBox();
svg.remove()
.attr("width", box.width)
.attr("height", box.height)
.attr("viewBox", `${box.x} ${box.y} ${box.width} ${box.height}`);
const zoom = d3.zoom()
.scaleExtent([1, 6])
.on("zoom", () => {
g.attr("transform", d3.event.transform);
});
svg.call(zoom).on("wheel.zoom", null);
return svg.node();
}
d3 = require("https://d3js.org/d3.v5.min.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.
