chart = Icicle(flare, {
value: d => d.size, // size of each node (file); null for internal nodes (folders)
label: d => d.name, // display name for each cell
title: (d, n) => `${n.ancestors().reverse().map(d => d.data.name).join(".")}\n${n.value.toLocaleString("en")}`, // hover text
link: (d, n) => n.children
? `https://github.com/prefuse/Flare/tree/master/flare/src/${n.ancestors().reverse().map(d => d.data.name).join("/")}`
: `https://github.com/prefuse/Flare/blob/master/flare/src/${n.ancestors().reverse().map(d => d.data.name).join("/")}.as`,
width: 1152,
height: 2400
})
flare = FileAttachment("flare.json").json()
// Copyright 2021-2023 Observable, Inc.
// Released under the ISC license.
// https://observablehq.com/@d3/icicle
function Icicle(data, { // data is either tabular (array of objects) or hierarchy (nested objects)
path, // as an alternative to id and parentId, returns an array identifier, imputing internal nodes
id = Array.isArray(data) ? d => d.id : null, // if tabular data, given a d in data, returns a unique identifier (string)
parentId = Array.isArray(data) ? d => d.parentId : null, // if tabular data, given a node d, returns its parent’s identifier
children, // if hierarchical data, given a d in data, returns its children
format = ",", // format specifier string or function for values
value, // given a node d, returns a quantitative value (for area encoding; null for count)
sort = (a, b) => d3.descending(a.value, b.value), // how to sort nodes prior to layout
label, // given a node d, returns the name to display on the rectangle
title, // given a node d, returns its hover text
link, // given a node d, its link (if any)
linkTarget = "_blank", // the target attribute for links (if any)
width = 640, // outer width, in pixels
height = 400, // outer height, in pixels
margin = 0, // shorthand for margins
marginTop = margin, // top margin, in pixels
marginRight = margin, // right margin, in pixels
marginBottom = margin, // bottom margin, in pixels
marginLeft = margin, // left margin, in pixels
padding = 1, // cell padding, in pixels
round = false, // whether to round to exact pixels
color = d3.interpolateRainbow, // color scheme, if any
fill = "#ccc", // fill for node rects (if no color encoding)
fillOpacity = 0.6, // fill opacity for node rects
} = {}) {
// If id and parentId options are specified, or the path option, use d3.stratify
// to convert tabular data to a hierarchy; otherwise we assume that the data is
// specified as an object {children} with nested objects (a.k.a. the “flare.json”
// format), and use d3.hierarchy.
const root = path != null ? d3.stratify().path(path)(data)
: id != null || parentId != null ? d3.stratify().id(id).parentId(parentId)(data)
: d3.hierarchy(data, children);
// Compute the values of internal nodes by aggregating from the leaves.
value == null ? root.count() : root.sum(d => Math.max(0, value(d)));
// Compute formats.
if (typeof format !== "function") format = d3.format(format);
// Sort the leaves (typically by descending value for a pleasing layout).
if (sort != null) root.sort(sort);
// Compute the partition layout. Note that x and y are swapped!
d3.partition()
.size([height - marginTop - marginBottom, width - marginLeft - marginRight])
.padding(padding)
.round(round)
(root);
// Construct a color scale.
if (color != null) {
color = d3.scaleSequential([0, root.children.length - 1], color).unknown(fill);
root.children.forEach((child, i) => child.index = i);
}
const svg = d3.create("svg")
.attr("viewBox", [-marginLeft, -marginTop, width, height])
.attr("width", width)
.attr("height", height)
.attr("style", "max-width: 100%; height: auto; height: intrinsic;")
.attr("font-family", "sans-serif")
.attr("font-size", 10);
const cell = svg
.selectAll("a")
.data(root.descendants())
.join("a")
.attr("xlink:href", link == null ? null : d => link(d.data, d))
.attr("target", link == null ? null : linkTarget)
.attr("transform", d => `translate(${d.y0},${d.x0})`);
cell.append("rect")
.attr("width", d => d.y1 - d.y0)
.attr("height", d => d.x1 - d.x0)
.attr("fill", color ? d => color(d.ancestors().reverse()[1]?.index) : fill)
.attr("fill-opacity", fillOpacity);
const text = cell.filter(d => d.x1 - d.x0 > 10).append("text")
.attr("x", 4)
.attr("y", d => Math.min(9, (d.x1 - d.x0) / 2))
.attr("dy", "0.32em");
if (label != null) text.append("tspan")
.text(d => label(d.data, d));
text.append("tspan")
.attr("fill-opacity", 0.7)
.attr("dx", label == null ? null : 3)
.text(d => format(d.value));
if (title != null) cell.append("title")
.text(d => title(d.data, d));
return svg.node();
}
import {howto} from "@d3/example-components"
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.
