Skip to content

Instantly share code, notes, and snippets.

Last active January 18, 2021 11:05
Show Gist options
  • Save kerryrodden/477c1bfb081b783f80ad to your computer and use it in GitHub Desktop.
Save kerryrodden/477c1bfb081b783f80ad to your computer and use it in GitHub Desktop.
Zoomable sunburst with updating data

I combined Mike Bostock's Zoomable Sunburst and Sunburst Partition examples, so that I could have both zooming and updating the underlying data (between count and size, in this case). A simple combination of the examples does not work; you have to edit the arcTween function used for updating the data, so that when it redraws the partition layout, it takes account of the current zoom level by adjusting the domain of the x scale.

Click on any arc to zoom in, and click on the center circle to zoom out. Use the Size/Count radio buttons to update the data.

<!DOCTYPE html>
<meta charset="utf-8">
body {
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
margin: auto;
position: relative;
width: 960px;
form {
position: absolute;
right: 10px;
top: 10px;
path {
stroke: #fff;
fill-rule: evenodd;
<label><input type="radio" name="mode" value="size"> Size</label>
<label><input type="radio" name="mode" value="count" checked> Count</label>
<script src="//"></script>
var width = 960,
height = 700,
radius = Math.min(width, height) / 2;
var x = d3.scale.linear()
.range([0, 2 * Math.PI]);
var y = d3.scale.sqrt()
.range([0, radius]);
var color = d3.scale.category20c();
var svg ="body").append("svg")
.attr("width", width)
.attr("height", height)
.attr("transform", "translate(" + width / 2 + "," + (height / 2 + 10) + ")");
var partition = d3.layout.partition()
.value(function(d) { return 1; });
var arc = d3.svg.arc()
.startAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x))); })
.endAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x + d.dx))); })
.innerRadius(function(d) { return Math.max(0, y(d.y)); })
.outerRadius(function(d) { return Math.max(0, y(d.y + d.dy)); });
// Keep track of the node that is currently being displayed as the root.
var node;
d3.json("/d/4063550/flare.json", function(error, root) {
node = root;
var path = svg.datum(root).selectAll("path")
.attr("d", arc)
.style("fill", function(d) { return color((d.children ? d : d.parent).name); })
.on("click", click)
d3.selectAll("input").on("change", function change() {
var value = this.value === "count"
? function() { return 1; }
: function(d) { return d.size; };
.attrTween("d", arcTweenData);
function click(d) {
node = d;
.attrTween("d", arcTweenZoom(d));
});"height", height + "px");
// Setup for switching data: stash the old values for transition.
function stash(d) {
d.x0 = d.x;
d.dx0 = d.dx;
// When switching data: interpolate the arcs in data space.
function arcTweenData(a, i) {
var oi = d3.interpolate({x: a.x0, dx: a.dx0}, a);
function tween(t) {
var b = oi(t);
a.x0 = b.x;
a.dx0 = b.dx;
return arc(b);
if (i == 0) {
// If we are on the first arc, adjust the x domain to match the root node
// at the current zoom level. (We only need to do this once.)
var xd = d3.interpolate(x.domain(), [node.x, node.x + node.dx]);
return function(t) {
return tween(t);
} else {
return tween;
// When zooming: interpolate the scales.
function arcTweenZoom(d) {
var xd = d3.interpolate(x.domain(), [d.x, d.x + d.dx]),
yd = d3.interpolate(y.domain(), [d.y, 1]),
yr = d3.interpolate(y.range(), [d.y ? 20 : 0, radius]);
return function(d, i) {
return i
? function(t) { return arc(d); }
: function(t) { x.domain(xd(t)); y.domain(yd(t)).range(yr(t)); return arc(d); };
Copy link

I'm new to d3, git, and everything else (I'm a former C++ programmer). I've got a zoomable version of the sunburst chart (with text) working based on a variation from Jason Davies. (Just posted in a repository.)

I'd like to change it to incorporate sizing (I'm fine with it being static - not going back and forth between count and size). I've looked at your code, but get lost in the differences between my code (Jason's) and yours. Also, apparently the formatting is slightly different for the JSON files between your version and Jason's (in spite of the shared origins), as I can't just drop in my JSON file with your code.

Any help you can give me would be greatly appreciated! And any chance you could post your JSON file? It would help me to be able to see that.

Thanks, Jen

Copy link

aalaap commented Mar 24, 2015

@JenniferPDX the JSON from the source is viewable at the following URL:

I hope that helps!

Copy link

how to display the labels in each arc ?

Copy link

denjn5 commented Sep 18, 2016

This is great Kerry! I've updated to D3 version 4 ( That turned out to be more complex than I expected. I wouldn't have gotten there without this. I'm going to work on adding labels next. -- David

Copy link

This is great. I'm not particularly D3 savvy and would love to see something like the labels and/or center text from your sunburst sequence example. How hard would this be? Do you have anything similar in the works?

I'd like to use it to provide "daisydisk" like functionality for reports from a large fileserver.

Copy link

yalopov commented Jul 30, 2017

Seems like chart is not working because script can't fetch flare.json. What a shame, looks awesome!

Copy link

G202 commented Aug 10, 2017

Looks like someone beat me to it, but was just alerting you that the example here is currently not rendering at all.

Copy link

HenryQW commented Aug 12, 2017

@hades1996 @absolute-ecomm
Replace the JSON path will fix it, see my fork:

Copy link

Hi, I am working on sunburst where I got the following issue.
Some of the nodes are not visible clearly that it is overlapped by other nodes. Could someone help me to fix it?

Copy link

ghost commented Dec 15, 2018

how to show the percentage ?

Copy link

I am trying to run this on a local system without a web server, and running into CORS errors while trying to access my local flare.js. Is there any workaround for this?

Copy link

I am trying to run this on a local system without a web server, and running into CORS errors while trying to access my local flare.js. Is there any workaround for this?

Host the file on a remote source say for instance then update the URL accordingly.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment