Gallery: sunburst

https://github.com/rstudio/r2d3/tree/master/vignettes/gallery/sunburst

bubbles bullets calendar cartogram chord circlepacking dendogram forcegraph morley population radialtree stackedbars streamgraph sunburst treemap voronoi

r2d3(data = jsonlite::read_json("flare.json"), d3_version = 3, script = "sunburst.js")

sunburst.js

// !preview r2d3 data = jsonlite::read_json("flare.json"), d3_version = 3

// Based on: https://bl.ocks.org/mbostock/4063423

var radius = Math.min(width, height) / 2,
    color = d3.scale.category20c();

var group = svg.append("g")
    .attr("transform", "translate(" + width / 2 + "," + height / 2 + ")");

var partition = d3.layout.partition()
    .sort(null)
    .size([2 * Math.PI, radius * radius])
    .value(function(d) { return 1; });

var arc = d3.svg.arc()
    .startAngle(function(d) { return d.x; })
    .endAngle(function(d) { return d.x + d.dx; })
    .innerRadius(function(d) { return Math.sqrt(d.y); })
    .outerRadius(function(d) { return Math.sqrt(d.y + d.dy); });

r2d3.onRender(function(root, svg, w, h, options) {
  var path = group.datum(root).selectAll("path")
      .data(partition.nodes)
    .enter().append("path")
      .attr("display", function(d) { return d.depth ? null : "none"; }) // hide inner ring
      .attr("d", arc)
      .style("stroke", "#fff")
      .style("fill", function(d) { return color((d.children ? d : d.parent).name); })
      .style("fill-rule", "evenodd")
      .each(stash);

  d3.selectAll("input").on("change", function change() {
    var value = this.value === "count"
        ? function() { return 1; }
        : function(d) { return d.size; };

    path
        .data(partition.value(value).nodes)
      .transition()
        .duration(1500)
        .attrTween("d", arcTween);
  });
});

// Stash the old values for transition.
function stash(d) {
  d.x0 = d.x;
  d.dx0 = d.dx;
}

// Interpolate the arcs in data space.
function arcTween(a) {
  var i = d3.interpolate({x: a.x0, dx: a.dx0}, a);
  return function(t) {
    var b = i(t);
    a.x0 = b.x;
    a.dx0 = b.dx;
    return arc(b);
  };
}

sunburst.css

body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}