Using the example from Directional Force Layout Diagram with varying link opacity this graph shows website visitors to a website by ga:region, but where the ga:region dimension changes at least once in between sessions in a month's timeframe.
Aggregate data obtained via the Google Analytics API. There is a bit more background info here.
| source | target | value | |
|---|---|---|---|
| North Carolina | Tennessee | 136 | |
| Virginia | District of Columbia | 132 | |
| North Carolina | Georgia | 130 | |
| District of Columbia | Virginia | 124 | |
| Georgia | North Carolina | 123 | |
| Oklahoma | Louisiana | 116 | |
| Wisconsin | Illinois | 111 | |
| Louisiana | Oklahoma | 103 | |
| Tennessee | North Carolina | 103 | |
| Texas | Louisiana | 91 | |
| Illinois | Wisconsin | 88 | |
| Louisiana | Texas | 87 | |
| Tennessee | Georgia | 84 | |
| Georgia | Tennessee | 76 | |
| Oklahoma | Texas | 72 | |
| Oklahoma | Arkansas | 70 | |
| Missouri | Illinois | 65 | |
| Kentucky | Alabama | 62 | |
| North Carolina | South Carolina | 62 | |
| South Carolina | North Carolina | 62 | |
| Florida | Georgia | 61 | |
| Georgia | Florida | 59 | |
| Illinois | Missouri | 59 | |
| Texas | Oklahoma | 59 | |
| North Carolina | Wisconsin | 57 | |
| Alabama | Georgia | 55 | |
| Georgia | Alabama | 51 | |
| Kentucky | Tennessee | 51 | |
| Arkansas | Tennessee | 50 | |
| Arkansas | Oklahoma | 49 | |
| Wisconsin | North Carolina | 47 | |
| Indiana | Illinois | 46 | |
| Kentucky | Georgia | 46 | |
| Kentucky | Indiana | 46 | |
| Alabama | Kentucky | 43 | |
| Mississippi | Kentucky | 43 | |
| Tennessee | Arkansas | 43 | |
| Indiana | Kentucky | 42 | |
| Washington | Oregon | 42 | |
| Illinois | Indiana | 41 | |
| Missouri | Kansas | 41 | |
| Tennessee | Kentucky | 40 | |
| Texas | California | 38 | |
| California | Oregon | 37 | |
| Georgia | South Carolina | 37 | |
| Louisiana | Arkansas | 37 | |
| Pennsylvania | New Jersey | 37 | |
| Virginia | North Carolina | 37 | |
| Arkansas | Louisiana | 36 | |
| Georgia | Kentucky | 36 | |
| Tennessee | Louisiana | 36 | |
| California | Texas | 34 | |
| Massachusetts | New York | 34 | |
| North Dakota | Minnesota | 34 | |
| Iowa | Minnesota | 33 | |
| Louisiana | Tennessee | 33 | |
| Minnesota | North Dakota | 33 | |
| Oregon | Washington | 33 | |
| Pennsylvania | Michigan | 33 | |
| Pennsylvania | Virginia | 33 | |
| Kansas | Missouri | 32 | |
| Maryland | District of Columbia | 32 | |
| Massachusetts | Virginia | 32 | |
| New Jersey | Pennsylvania | 32 | |
| North Carolina | Virginia | 32 | |
| South Carolina | Georgia | 32 | |
| Texas | Illinois | 32 | |
| Iowa | Nebraska | 30 | |
| Nebraska | Iowa | 30 | |
| New York | Massachusetts | 30 | |
| Oregon | California | 30 | |
| Pennsylvania | Ohio | 30 | |
| Michigan | Pennsylvania | 29 | |
| Oklahoma | Colorado | 29 | |
| Colorado | Utah | 28 | |
| Minnesota | Iowa | 28 | |
| Ohio | Michigan | 28 | |
| Ohio | Pennsylvania | 28 | |
| California | Florida | 26 | |
| California | Washington | 26 | |
| Kentucky | Mississippi | 26 | |
| Oklahoma | Tennessee | 26 | |
| South Carolina | Tennessee | 26 | |
| Virginia | Tennessee | 26 | |
| Illinois | Texas | 25 | |
| Michigan | Ohio | 25 | |
| Missouri | California | 25 | |
| Virginia | Pennsylvania | 25 | |
| Washington | California | 25 | |
| District of Columbia | Maryland | 24 | |
| Illinois | Iowa | 24 | |
| Michigan | Illinois | 24 | |
| Nebraska | Minnesota | 24 | |
| North Carolina | Illinois | 24 | |
| Pennsylvania | District of Columbia | 24 | |
| Tennessee | Oklahoma | 24 | |
| Tennessee | Virginia | 24 | |
| Virginia | Maryland | 24 | |
| Virginia | Massachusetts | 24 |
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <script src="http://d3js.org/d3.v3.js"></script> | |
| <style> | |
| path.link { | |
| fill: none; | |
| stroke: #666; | |
| stroke-width: 1.5px; | |
| } | |
| path.link.twofive { | |
| opacity: 0.25; | |
| } | |
| path.link.fivezero { | |
| opacity: 0.50; | |
| } | |
| path.link.sevenfive { | |
| opacity: 0.75; | |
| } | |
| path.link.onezerozero { | |
| opacity: 1.0; | |
| } | |
| circle { | |
| fill: #ccc; | |
| stroke: #fff; | |
| stroke-width: 1.5px; | |
| } | |
| text { | |
| fill: #000; | |
| font: 10px sans-serif; | |
| pointer-events: none; | |
| } | |
| </style> | |
| <body> | |
| <script> | |
| // get the data | |
| d3.csv("force.csv", function(error, links) { | |
| var nodes = {}; | |
| // Compute the distinct nodes from the links. | |
| links.forEach(function(link) { | |
| link.source = nodes[link.source] || | |
| (nodes[link.source] = {name: link.source}); | |
| link.target = nodes[link.target] || | |
| (nodes[link.target] = {name: link.target}); | |
| link.value = +link.value; | |
| }); | |
| var width = 960, | |
| height = 700, | |
| color = d3.scale.category20c(); | |
| var force = d3.layout.force() | |
| .nodes(d3.values(nodes)) | |
| .links(links) | |
| .size([width, height]) | |
| .linkDistance(100) | |
| .charge(-600) | |
| .on("tick", tick) | |
| .start(); | |
| // Set the range | |
| var v = d3.scale.linear().range([0, 100]); | |
| // Scale the range of the data | |
| v.domain([0, d3.max(links, function(d) { return d.value; })]); | |
| // asign a type per value to encode opacity | |
| links.forEach(function(link) { | |
| if (v(link.value) <= 25) { | |
| link.type = "twofive"; | |
| } else if (v(link.value) <= 50 && v(link.value) > 25) { | |
| link.type = "fivezero"; | |
| } else if (v(link.value) <= 75 && v(link.value) > 50) { | |
| link.type = "sevenfive"; | |
| } else if (v(link.value) <= 100 && v(link.value) > 75) { | |
| link.type = "onezerozero"; | |
| } | |
| }); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| // build the arrow. | |
| svg.append("svg:defs").selectAll("marker") | |
| .data(["end"]) // Different link/path types can be defined here | |
| .enter().append("svg:marker") // This section adds in the arrows | |
| .attr("id", String) | |
| .attr("viewBox", "0 -5 10 10") | |
| .attr("refX", 15) | |
| .attr("refY", -1.5) | |
| .attr("markerWidth", 6) | |
| .attr("markerHeight", 6) | |
| .attr("orient", "auto") | |
| .append("svg:path") | |
| .attr("d", "M0,-5L10,0L0,5"); | |
| // add the links and the arrows | |
| var path = svg.append("svg:g").selectAll("path") | |
| .data(force.links()) | |
| .enter().append("svg:path") | |
| .attr("class", function(d) { return "link " + d.type; }) | |
| .attr("marker-end", "url(#end)"); | |
| // define the nodes | |
| var node = svg.selectAll(".node") | |
| .data(force.nodes()) | |
| .enter().append("g") | |
| .attr("class", "node") | |
| .on("click", click) | |
| .on("dblclick", dblclick) | |
| .call(force.drag); | |
| // add the nodes | |
| node.append("circle") | |
| .attr("r", 5) | |
| .style("fill", function(d) { return color(d.name); }); | |
| // add the text | |
| node.append("text") | |
| .attr("x", 12) | |
| .attr("dy", ".35em") | |
| .text(function(d) { return d.name; }); | |
| // add the curvy lines | |
| function tick() { | |
| path.attr("d", function(d) { | |
| var dx = d.target.x - d.source.x, | |
| dy = d.target.y - d.source.y, | |
| dr = Math.sqrt(dx * dx + dy * dy); | |
| return "M" + | |
| d.source.x + "," + | |
| d.source.y + "A" + | |
| dr + "," + dr + " 0 0,1 " + | |
| d.target.x + "," + | |
| d.target.y; | |
| }); | |
| node | |
| .attr("transform", function(d) { | |
| return "translate(" + d.x + "," + d.y + ")"; }); | |
| } | |
| // action to take on mouse click | |
| function click() { | |
| d3.select(this).select("text").transition() | |
| .duration(750) | |
| .attr("x", 22) | |
| .style("stroke", "lightsteelblue") | |
| .style("stroke-width", ".5px") | |
| .style("font", "20px sans-serif"); | |
| d3.select(this).select("circle").transition() | |
| .duration(750) | |
| .attr("r", 16); | |
| } | |
| // action to take on mouse double click | |
| function dblclick() { | |
| d3.select(this).select("circle").transition() | |
| .duration(750) | |
| .attr("r", 6); | |
| d3.select(this).select("text").transition() | |
| .duration(750) | |
| .attr("x", 12) | |
| .style("stroke", "none") | |
| .style("fill", "black") | |
| .style("stroke", "none") | |
| .style("font", "10px sans-serif"); | |
| } | |
| }); | |
| </script> | |
| </body> | |
| </html> |