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May 25, 2014 21:06
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| .node circle { | |
| fill: #fff; | |
| stroke: steelblue; | |
| stroke-width: 1.5px; | |
| } | |
| .node { | |
| font: 10px sans-serif; | |
| } | |
| .link { | |
| fill: none; | |
| stroke: #ccc; | |
| stroke-width: 1.5px; | |
| } |
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| <meta name="description" content="G function from GEB page 137" /> | |
| <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <body></bod> |
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| var width = 960, | |
| height = 600, | |
| number = 100; | |
| function G(n){ | |
| if(n===0){ | |
| return 0; | |
| }else{ | |
| return n - G(G(n-1)); | |
| } | |
| } | |
| function tree(nodes) { | |
| var nodeById = {}; | |
| // Index the nodes by id, in case they come out of order. | |
| nodes.forEach(function(d) { | |
| nodeById[d.name] = d; | |
| }); | |
| // Lazily compute children. | |
| nodes.forEach(function(d) { | |
| if(String(d.val) != d.name){ | |
| var val = nodeById[d.val]; | |
| if (val.children){ | |
| val.children.push(d); | |
| }else{ | |
| val.children = [d]; | |
| } | |
| } | |
| }); | |
| return nodes[0]; | |
| } | |
| dataArray = []; | |
| for(var i=1; i<number; i++ ){ | |
| var val = G(i); | |
| dataArray.push({name:String(i), val: val}); | |
| } | |
| var data = tree(dataArray); | |
| var cluster = d3.layout.cluster() | |
| .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.select(self.frameElement).style("height", height + "px"); | |
| var nodes = cluster.nodes(data), | |
| links = cluster.links(nodes); | |
| var link = svg.selectAll(".link") | |
| .data(links) | |
| .enter().append("path") | |
| .attr("class", "link") | |
| .attr("d", diagonal); | |
| var node = svg.selectAll(".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) | |
| .style("text-anchor", function(d) { return d.children ? "end" : "start"; }) | |
| .text(function(d) { return d.name; }); |
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the G function from GEB page 137.