The tree layout implements the Reingold-Tilford algorithm for efficient, tidy arrangement of layered nodes. The depth of nodes is computed by distance from the root, leading to a ragged appearance. Radial orientations are also supported. Implementation based on work by Jeff Heer and Jason Davies using Buchheim et al.'s linear-time variant of the Reingold-Tilford algorithm. Data shows the Flare class hierarchy, also courtesy Jeff Heer.
Compare to this radial layout.
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .node circle { | |
| fill: #fff; | |
| stroke: steelblue; | |
| stroke-width: 1.5px; | |
| } | |
| .node { | |
| font: 10px sans-serif; | |
| } | |
| .link { | |
| fill: none; | |
| stroke: #ccc; | |
| stroke-width: 1.5px; | |
| } | |
| </style> | |
| <body> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 2000; | |
| var tree = d3.layout.tree() | |
| .size([height, width - 160]); | |
| var diagonal = d3.svg.diagonal() | |
| .projection(function(d) { return [d.y, d.x]; }); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .append("g") | |
| .attr("transform", "translate(40,0)"); | |
| d3.json("/mbostock/raw/4063550/flare.json", function(error, json) { | |
| if (error) throw error; | |
| json = {"title":"root","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":{"name":35}},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":{"name":35}},{"name":"vertex","children":[{"name":"vertex","children":{"name":19}},{"name":"vertex","children":{"name":35}}]}]},{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":{"name":35}},{"name":"vertex","children":{"name":35}}]},{"name":"vertex","children":[{"name":"vertex","children":{"name":35}},{"name":"vertex","children":{"name":35}}]}]}]},{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":{"name":51}},{"name":"vertex","children":{"name":51}}]},{"name":"vertex","children":[{"name":"vertex","children":{"name":51}},{"name":"vertex","children":{"name":51}}]}]}]}]},{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":{"name":51}},{"name":"vertex","children":{"name":51}}]},{"name":"vertex","children":[{"name":"vertex","children":{"name":51}},{"name":"vertex","children":{"name":67}}]}]},{"name":"vertex","children":[{"name":"vertex","children":{"name":67}},{"name":"vertex","children":{"name":6}}]}]}]},{"name":"vertex","children":{"name":20}}]{"title":"root","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":{"name":35}},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":{"name":19}}]},{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":{"name":35}},{"name":"vertex","children":[{"name":"vertex","children":{"name":19}},{"name":"vertex","children":{"name":35}}]}]},{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":{"name":35}},{"name":"vertex","children":{"name":35}}]},{"name":"vertex","children":[{"name":"vertex","children":{"name":35}},{"name":"vertex","children":{"name":35}}]}]}]},{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":{"name":51}},{"name":"vertex","children":{"name":51}}]},{"name":"vertex","children":[{"name":"vertex","children":{"name":51}},{"name":"vertex","children":{"name":51}}]}]}]}]},{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":[{"name":"vertex","children":{"name":51}},{"name":"vertex","children":{"name":51}}]},{"name":"vertex","children":[{"name":"vertex","children":{"name":51}},{"name":"vertex","children":{"name":67}}]}]},{"name":"vertex","children":[{"name":"vertex","children":{"name":67}},{"name":"vertex","children":{"name":6}}]}]}]},{"name":"vertex","children":{"name":20}}]}; | |
| var nodes = tree.nodes(json), | |
| links = tree.links(nodes); | |
| var link = svg.selectAll("path.link") | |
| .data(links) | |
| .enter().append("path") | |
| .attr("class", "link") | |
| .attr("d", diagonal); | |
| var node = svg.selectAll("g.node") | |
| .data(nodes) | |
| .enter().append("g") | |
| .attr("class", "node") | |
| .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; }) | |
| node.append("circle") | |
| .attr("r", 4.5); | |
| node.append("text") | |
| .attr("dx", function(d) { return d.children ? -8 : 8; }) | |
| .attr("dy", 3) | |
| .attr("text-anchor", function(d) { return d.children ? "end" : "start"; }) | |
| .text(function(d) { return d.name; }); | |
| }); | |
| d3.select(self.frameElement).style("height", height + "px"); | |
| </script> |