Created
January 7, 2015 03:09
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Hierarchy of Physical Science Disciplines with d3.js
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html;charset=utf-8"> | |
| <title>Node-Link Tree</title> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.js?1.27.2s"></script> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.layout.js?1.27.2"></script> | |
| <style type="text/css"> | |
| .node circle { | |
| cursor: pointer; | |
| fill: #fff; | |
| stroke: steelblue; | |
| stroke-width: 1.5px; | |
| } | |
| .node text { | |
| font: 14px times; | |
| } | |
| path.link { | |
| fill: none; | |
| stroke: #ccc; | |
| stroke-width: 2.5px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="chart"></div> | |
| <script type="text/javascript"> | |
| var m = [20, 120, 20, 120], | |
| w = 2560 - m[1] - m[3], | |
| h = 640 - m[0] - m[2], | |
| i = 0, | |
| duration = 500; | |
| var root = {"name" : "Physical Sciences", "children" : [ | |
| {"name" : "Astronomy", "children" : [ | |
| {"name" : "Cosmology"} ] | |
| }, | |
| {"name" : "Chemistry", "children" : [ | |
| {"name" : "Biochemistry"}, | |
| {"name" : "Environmental Chemistry"}, | |
| {"name" : "Pharmaceutical Chemistry"}, | |
| {"name" : "Organic Chemistry"}, | |
| {"name" : "Physical Chemistry"}, | |
| {"name" : "Polymer Chemistry"} ] | |
| }, | |
| {"name" : "Computer Science", "children" : [ | |
| {"name" : "Robotics"}, | |
| {"name" : "Systems Architecture"}, | |
| {"name" : "Database and Information Systems"}, | |
| {"name" : "Graphics"}, | |
| {"name" : "Scientific Computing", "children" : [ | |
| {"name" : "Machine Learning"}, | |
| {"name" : "Cryptanalysis"} ] | |
| }, | |
| {"name" : "Software Engineering"}, | |
| {"name" : "Theory and Algorithms"} ] | |
| }, | |
| {"name" : "Earth Science", "children" : [ | |
| {"name" : "Environmental Science"}, | |
| {"name" : "Geology"}, | |
| {"name" : "Seismology"}, | |
| {"name" : "Glacioilogy"}, | |
| {"name" : "Paleontology", "children" : [ | |
| {"name" : "Paleoclimatology"}, | |
| {"name" : "Paleoecology"}, | |
| {"name" : "Micropaleontology"} ] | |
| }, | |
| {"name" : "Tectonics"}, | |
| {"name" : "Vulcanology"} ] | |
| }, | |
| {"name" : "Mathematics", "children" : [ | |
| {"name" : "Algebra", "children" : [ | |
| {"name" : "Non-linear Algebra"}, | |
| {"name" : "Algebraic Geometry"} ] | |
| }, | |
| {"name" : "Geometry", "children" : [ | |
| {"name" : "Topology"} ] | |
| }, | |
| {"name" : "Trigonometry"}, | |
| {"name" : "Logic"}, | |
| {"name" : "Number Theory", "children" : [ | |
| {"name" : "Combinatorics"} ] | |
| } ] | |
| }, | |
| {"name" : "Physics", "children" : [ | |
| {"name" : "Non-linear Dynamics", "children" : [ | |
| {"name" : "Fluid Dynamics"}, | |
| {"name" : "Thermodynamics"} ] | |
| }, | |
| {"name" : "Quantum Physics", "children" : [ | |
| {"name" : "Solid-state Physics"}, | |
| {"name" : "Atomic Physics"}, | |
| {"name" : "Computational Physics"} ] | |
| }, | |
| {"name" : "Acoustics"}, | |
| {"name" : "Ballistics"}, | |
| {"name" : "Optics"} ] | |
| }, | |
| {"name" : "Statistics", "children" : [ | |
| {"name" : "Applied Statistics"}, | |
| {"name" : "Biostatistics"}, | |
| {"name" : "Probability Theory"}, | |
| {"name" : "Data Science", "children" : [ | |
| {"name" : "Visualization"}, | |
| {"name" : "Uncertainty Modeling"}, | |
| {"name" : "Predictive Analytics"}, | |
| {"name" : "Data Mining"}, | |
| {"name" : "Computational Statistics"} ] | |
| } ] | |
| } | |
| ]}; | |
| var tree = d3.layout.tree() | |
| .size([h, w]); | |
| var diagonal = d3.svg.diagonal() | |
| .projection(function(d) { return [d.y, d.x]; }); | |
| var vis = d3.select("#chart").append("svg:svg") | |
| .attr("width", w + m[1] + m[3]) | |
| .attr("height", h + m[0] + m[2]) | |
| .append("svg:g") | |
| .attr("transform", "translate(" + m[3] + "," + m[0] + ")"); | |
| root.x0 = h / 2; | |
| root.y0 = 0; | |
| function collapse(d) { | |
| if (d.children) { | |
| d._children = d.children; | |
| d._children.forEach(collapse); | |
| d.children = null; | |
| } | |
| } | |
| root.children.forEach(collapse); | |
| update(root); | |
| function update(source) { | |
| // Compute the new tree layout. | |
| var nodes = tree.nodes(root).reverse(); | |
| // Normalize for fixed-depth. | |
| nodes.forEach(function(d) { d.y = d.depth * 180; }); | |
| // Update the nodes… | |
| var node = vis.selectAll("g.node") | |
| .data(nodes, function(d) { return d.id || (d.id = ++i); }); | |
| // Enter any new nodes at the parent's previous position. | |
| var nodeEnter = node.enter().append("svg:g") | |
| .attr("class", "node") | |
| .attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; }) | |
| .on("click", click); | |
| nodeEnter.append("svg:circle") | |
| .attr("r", 1e-6) | |
| .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; }); | |
| nodeEnter.append("svg:text") | |
| .attr("x", function(d) { return d.children || d._children ? -10 : 10; }) | |
| .attr("dy", ".35em") | |
| .attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; }) | |
| .text(function(d) { return d.name; }) | |
| .style("fill-opacity", 1e-6); | |
| // Transition nodes to their new position. | |
| var nodeUpdate = node.transition() | |
| .duration(duration) | |
| .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; }); | |
| nodeUpdate.select("circle") | |
| .attr("r", 4.5) | |
| .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; }); | |
| nodeUpdate.select("text") | |
| .style("fill-opacity", 1); | |
| // Transition exiting nodes to the parent's new position. | |
| var nodeExit = node.exit().transition() | |
| .duration(duration) | |
| .attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; }) | |
| .remove(); | |
| nodeExit.select("circle") | |
| .attr("r", 1e-6); | |
| nodeExit.select("text") | |
| .style("fill-opacity", 1e-6); | |
| // Update the links… | |
| var link = vis.selectAll("path.link") | |
| .data(tree.links(nodes), function(d) { return d.target.id; }); | |
| // Enter any new links at the parent's previous position. | |
| link.enter().insert("svg:path", "g") | |
| .attr("class", "link") | |
| .attr("d", function(d) { | |
| var o = {x: source.x0, y: source.y0}; | |
| return diagonal({source: o, target: o}); | |
| }) | |
| .transition() | |
| .duration(duration) | |
| .attr("d", diagonal); | |
| // Transition links to their new position. | |
| link.transition() | |
| .duration(duration) | |
| .attr("d", diagonal); | |
| // Transition exiting nodes to the parent's new position. | |
| link.exit().transition() | |
| .duration(duration) | |
| .attr("d", function(d) { | |
| var o = {x: source.x, y: source.y}; | |
| return diagonal({source: o, target: o}); | |
| }) | |
| .remove(); | |
| // Stash the old positions for transition. | |
| nodes.forEach(function(d) { | |
| d.x0 = d.x; | |
| d.y0 = d.y; | |
| }); | |
| } | |
| // Toggle children on click. | |
| function click(d) { | |
| if (d.children) { | |
| d._children = d.children; | |
| d.children = null; | |
| } else { | |
| d.children = d._children; | |
| d._children = null; | |
| } | |
| update(d); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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