family = d3.hierarchy({
name: "root",
children: [
{name: "child #1"},
{
name: "child #2",
children: [
{name: "grandchild #1"},
{name: "grandchild #2"},
{name: "grandchild #3"}
]
}
]
})
d3.hierarchy(familyChart)
arrays = d3.hierarchy([
[
"leaf #1",
[
"leaf #2",
"leaf #3",
"leaf #4"
]
]
], d => Array.isArray(d) ? d : undefined)
parsed = d3.hierarchy(
"This is not proper parsing. But certainly fun!",
id => {
for (const split of [/[^\w\s]/, /\s/]) {
const children = id && id.split(split).filter(id => id.length > 0);
if (children.length > 1) return children;
}
}
)
chaos = d3.stratify()([
{id: "Chaos"},
{id: "Gaia", parentId: "Chaos"},
{id: "Eros", parentId: "Chaos"},
{id: "Erebus", parentId: "Chaos"},
{id: "Tartarus", parentId: "Chaos"},
{id: "Mountains", parentId: "Gaia"},
{id: "Pontus", parentId: "Gaia"},
{id: "Uranus", parentId: "Gaia"}
])
chaos instanceof d3.hierarchy
chaos.data
gaia = chaos.children[0]
pontus = chaos.children[0].children[1]
tartarus = chaos.children[3]
tartarus.children
gaia.ancestors()
pontus.ancestors()
gaia.descendants()
gaia.leaves()
tartarus.path(pontus)
gaia.links()
gaia.copy()
d3 = require("d3@6")
dx = 12
dy = 120
tree = d3.tree().nodeSize([dx, dy])
treeLink = d3.linkHorizontal().x(d => d.y).y(d => d.x)
function graph(root, {
label = d => d.data.id,
highlight = () => false,
marginLeft = 40
} = {}) {
root = tree(root);
let x0 = Infinity;
let x1 = -x0;
root.each(d => {
if (d.x > x1) x1 = d.x;
if (d.x < x0) x0 = d.x;
});
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, x1 - x0 + dx * 2])
.style("overflow", "visible");
const g = svg.append("g")
.attr("font-family", "sans-serif")
.attr("font-size", 10)
.attr("transform", `translate(${marginLeft},${dx - x0})`);
const link = g.append("g")
.attr("fill", "none")
.attr("stroke", "#555")
.attr("stroke-opacity", 0.4)
.attr("stroke-width", 1.5)
.selectAll("path")
.data(root.links())
.join("path")
.attr("stroke", d => highlight(d.source) && highlight(d.target) ? "red" : null)
.attr("stroke-opacity", d => highlight(d.source) && highlight(d.target) ? 1 : null)
.attr("d", treeLink);
const node = g.append("g")
.attr("stroke-linejoin", "round")
.attr("stroke-width", 3)
.selectAll("g")
.data(root.descendants())
.join("g")
.attr("transform", d => `translate(${d.y},${d.x})`);
node.append("circle")
.attr("fill", d => highlight(d) ? "red" : d.children ? "#555" : "#999")
.attr("r", 2.5);
node.append("text")
.attr("fill", d => highlight(d) ? "red" : null)
.attr("dy", "0.31em")
.attr("x", d => d.children ? -6 : 6)
.attr("text-anchor", d => d.children ? "end" : "start")
.text(label)
.clone(true).lower()
.attr("stroke", "white");
return svg.node();
}
width = 3000
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.
