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Sankey diagram with horizontal and vertical node movement

This is an example of a Sankey diagram made using d3.js and the sankey plugin.

It has a point of differenc from other Sankey diagrams I have seen in that the nodes can be moved horizontally and vertically.

A description of how it was put together and techniques for implimenting Sankey diagrams in general with d3.js can be found at d3noob.org or you can download the full text in the D3 Tips and Tricks book (for free) from Leanpub.

The data is sourced from the World Resources Institute (http://www.wri.org/chart/world-greenhouse-gas-emissions-2005). Open in full window for full effect.

<!DOCTYPE html>
<meta charset="utf-8">
<title>SANKEY Experiment</title>
<style>
.node rect {
cursor: move;
fill-opacity: .9;
shape-rendering: crispEdges;
}
.node text {
pointer-events: none;
text-shadow: 0 1px 0 #fff;
}
.node.hobered text {
pointer-events: none;
font-weight: bold;
text-shadow: 0 1px 0 #fff;
}
.link {
fill: none;
stroke: #000;
stroke-opacity: .3;
}
.link:hover, .link.hovered {
stroke-opacity: .9;
}
</style>
<body>
<p id="chart">
<script src="http://d3js.org/d3.v3.js"></script>
<script src="sankey.js"></script>
<script>
var units = "words";
var margin = {top: 10, right: 40, bottom: 40, left: 10},
width = document.documentElement.clientWidth - margin.left - margin.right,
height = document.documentElement.clientHeight - margin.top - margin.bottom;
var formatNumber = d3.format(",.0f"), // zero decimal places
format = function(d) { return formatNumber(d) + " " + units; },
color = d3.scale.category20();
// append the svg canvas to the page
var svg = d3.select("#chart").append("svg")
.attr("width", width)
.attr("height", height + margin.top)
.append("g")
.attr("transform",
"translate(0,0)");
// Set the sankey diagram properties
var sankey = d3.sankey()
.nodeWidth(36)
.nodePadding(10)
.size([width, height]);
var path = sankey.link();
var process = function(error, graph) {
var nodeMap = {};
graph.nodes.forEach(function(x) { nodeMap[x.name] = x; });
graph.links = graph.links.map(function(x) {
return {
source: nodeMap[x.source],
target: nodeMap[x.target],
value: x.value,
color: x.color,
topic: x.topic
};
});
sankey
.nodes(graph.nodes)
.links(graph.links)
.layout(32);
// add in the links
var link = svg.append("g").selectAll(".link")
.data(graph.links)
.enter().append("path")
.attr("class", function(d) { return "link link_" + d.topic; })
.attr("d", path)
.style("stroke", function(d) {
if ("color" in d)
return d.color; })
.style("stroke-width", function(d) { return Math.max(1, d.dy); })
.sort(function(a, b) { return b.dy - a.dy; });
// add the link titles
link.append("title")
.text(function(d) {
return d.topic + " — " + d.source.name + " → " +
d.target.name + "\n" +
nodeMap[d.topic].words + "\n" + format(d.value); });
// add in the nodes
var node = svg.append("g").selectAll(".node")
.data(graph.nodes)
.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) {
return "translate(" + d.x + "," + d.y + ")"; })
.on('mouseover', function(d) {
d3.selectAll('.link').classed("hovered", function (link) { return d.name.startsWith('T') ? link.topic == d.name : (link.source.name == d.name || link.target.name == d.name) })
})
.on('mouseout', function(d) {
d3.selectAll('.link').classed("hovered", false)
})
.call(d3.behavior.drag()
.origin(function(d) { return d; })
.on("dragstart", function() {
this.parentNode.appendChild(this); })
.on("drag", dragmove));
// add the rectangles for the nodes
node.append("a")
.attr("xlink:href", (d) => d.name.startsWith('T') ? 'http://inphodata.cogs.indiana.edu:16120/?topic=' + d.name.slice(1) : 'http://inphodata.cogs.indiana.edu:8083/entity/' + d.inpho_id)
.append("rect")
.attr("height", function(d) { return d.dy; })
.attr("width", sankey.nodeWidth())
.style("fill", function(d) {
if ("color" in d)
return d.color;
else if (d.targetLinks.length > 0) {
var bigLink = d.targetLinks.reduce( (prev, curr, idx, a) => (a[idx].value > a[prev].value) ? idx : prev, 0);
return d.color = d.targetLinks[bigLink].color;
} else
return d.color = color(d.name.replace(/ .*/, "")); })
.style("stroke", function(d) {
return d3.rgb(d.color).darker(2); })
.append("title")
.text(function(d) {
if (d.words) return d.name+ "\n" +d.words + "\n" + format(d.value);
else if (d.targetLinks.length > 0) {
var t = d.name + "\n" + "Topics → ";
t += d.targetLinks.map((x) => x.topic).join(', ');
t += "\n" + format(d.value);
return t;
} else return d.name + "\n" + format(d.value); });
// add in the title for the nodes
node.append("text")
.attr("x", -6)
.attr("y", function(d) { return d.dy / 2; })
.attr("dy", ".35em")
.attr("text-anchor", "end")
.attr("transform", null)
.text(function(d) { return d.name; })
.filter(function(d) { return d.x < width / 2; })
.attr("x", 6 + sankey.nodeWidth())
.attr("text-anchor", "start");
// the function for moving the nodes
function dragmove(d) {
d3.select(this).attr("transform",
"translate(" + (
d.x = Math.max(0, Math.min(width - d.dx, d3.event.x))
) + "," + (
d.y = Math.max(0, Math.min(height - d.dy, d3.event.y))
) + ")");
sankey.relayout();
link.attr("d", path);
}
};
// load the data
d3.json("multilayer.json", process);
</script>
</body>
</html>
{"nodes": [{"color": "#ff8000", "depth": 0, "name": "T12", "words": "punishment, harm, criminal, forgiveness, wrong, torture, civil, justice, crime, morally"}, {"color": "#fffe33", "depth": 0, "name": "T29", "words": "sets, numbers, axioms, axiom, cardinal, zfc, large, dedekind, cantor, paradox"}, {"color": "#e41a1c", "depth": 0, "name": "T40", "words": "rights, property, children, child, individuals, nozick, free, private, duties, legal"}, {"color": "#4daf4a", "depth": 0, "name": "T42", "words": "propositions, proposition, sentences, sentence, context, false, worlds, propositional, semantic, content"}, {"color": "#974fa2", "depth": 0, "name": "T43", "words": "justice, equality, equal, society, opportunity, health, economic, distributive, distribution, resources"}, {"color": "#f781bf", "depth": 0, "name": "T47", "words": "selection, evolutionary, species, biology, biological, genetic, genes, evolution, organisms, gene"}, {"color": "#4daf4a", "depth": 0, "name": "T50", "words": "approach, model, process, used, e.g, structure, analysis, relevant, systems, often"}, {"color": "#a7572a", "depth": 0, "name": "T54", "words": "proof, gdel, mathematics, intuitionistic, theorem, brouwer, arithmetic, hilbert, constructive, classical"}, {"color": "#e41a1c", "depth": 0, "name": "T56", "words": "spacetime, relativity, einstein, field, weyl, structure, physics, hole, energy, mass"}, {"color": "#f781bf", "depth": 0, "name": "T63", "words": "meaning, linguistic, semantic, words, word, meanings, languages, sentences, sentence, grammar"}, {"color": "#e41a1c", "depth": 0, "name": "T64", "words": "models, model, systems, chaos, behavior, biodiversity, conservation, simulation, species, target"}, {"color": "#397db6", "depth": 0, "name": "T65", "words": "model, x, formula, first-order, every, sentence, theorem, free, algebra, 0"}, {"color": "#4daf4a", "depth": 0, "name": "T66", "words": "art, aesthetic, beauty, aesthetics, works, beautiful, music, taste, artistic, arts"}, {"color": "#fffe33", "depth": 0, "name": "T69", "words": "divine, universe, power, perfect, necessary, exists, creation, theism, hartshorne, created"}, {"color": "#e41a1c", "depth": 0, "name": "T72", "words": "probability, evidence, hypothesis, h, hypotheses, probabilities, e, bayesian, data, inductive"}, {"color": "#a7572a", "depth": 0, "name": "T78", "words": "ways, values, often, cultural, issues, within, forms, practices, among, traditional"}, {"color": "#397db6", "depth": 0, "name": "T81", "words": "quantum, measurement, mechanics, classical, bohr, interpretation, wave, systems, particle, probability"}, {"color": "#a7572a", "depth": 0, "name": "T86", "words": "government, international, power, democratic, citizens, democracy, war, global, civil, politics"}, {"color": "#f781bf", "depth": 0, "name": "T87", "words": "makes, clear, think, understanding, indeed, simply, argues, understand, take, need"}, {"color": "#4daf4a", "depth": 0, "name": "T90", "words": "preferences, preference, choice, alternatives, economics, welfare, aggregation, voting, arrow, majority"}, {"color": "#974fa2", "depth": 0, "name": "T91", "words": "b, i.e, following, 3, consider, c, section, f, 4, either"}, {"color": "#fffe33", "depth": 0, "name": "T93", "words": "legal, authority, obligation, contract, consent, rule, rules, coercion, obligations, duty"}, {"color": "#f781bf", "depth": 0, "name": "T95", "words": "causal, cause, explanation, causation, causes, explanations, events, effect, explanatory, processes"}, {"color": "#e41a1c", "depth": 0, "name": "T96", "words": "scientific, empirical, sciences, epistemology, epistemic, method, evidence, methods, inquiry, naturalism"}, {"color": "#974fa2", "depth": 0, "name": "T99", "words": "strategies, evolutionary, empathy, altruism, rational, population, cooperation, strategy, behavior, payoff"}, {"color": "#a7572a", "depth": 0, "name": "T102", "words": "need, cases, better, best, think, less, still, take, making, perhaps"}, {"color": "#f781bf", "depth": 0, "name": "T103", "words": "e.g, notion, distinction, discussion, often, understood, views, accounts, although, respect"}, {"color": "#974fa2", "depth": 0, "name": "T107", "words": "justification, beliefs, justified, epistemic, evidence, know, believing, proposition, epistemology, believe"}, {"color": "#a7572a", "depth": 0, "name": "T110", "words": "game, player, players, games, strategy, agents, common, equilibrium, strategies, play"}, {"color": "#f781bf", "depth": 0, "name": "T111", "words": "women, feminist, men, feminists, sexual, gender, sex, pornography, marriage, male"}, {"color": "#e41a1c", "depth": 0, "name": "T112", "words": "gender, identity, body, sex, butler, lacan, sexual, difference, trans, bodies"}, {"color": "#fffe33", "depth": 0, "name": "T117", "words": "practical, principles, reasoning, action, values, capacity, understanding, basis, judgment, interpretation"}, {"inpho_id": 20112, "depth": 1, "name": "aesthetics and philosophy of art"}, {"inpho_id": 20190, "depth": 2, "name": "philosophy of art"}, {"inpho_id": 20230, "depth": 3, "name": "artistic form"}, {"inpho_id": 20236, "depth": 3, "name": "reception"}, {"inpho_id": 20340, "depth": 2, "name": "aesthetics"}, {"inpho_id": 20259, "depth": 3, "name": "aesthetic properties"}, {"inpho_id": 20120, "depth": 1, "name": "social and political philosophy"}, {"inpho_id": 20143, "depth": 2, "name": "social justice"}, {"inpho_id": 20262, "depth": 3, "name": "liberalism"}, {"inpho_id": 20263, "depth": 3, "name": "human rights"}, {"inpho_id": 20354, "depth": 3, "name": "distributive and economic justice"}, {"inpho_id": 20152, "depth": 2, "name": "political morality"}, {"inpho_id": 20282, "depth": 3, "name": "political authority"}, {"inpho_id": 20155, "depth": 2, "name": "forms of government"}, {"inpho_id": 20352, "depth": 2, "name": "international ethics"}, {"inpho_id": 20351, "depth": 3, "name": "war and pacifism"}, {"inpho_id": 20353, "depth": 2, "name": "global justice"}, {"inpho_id": 20137, "depth": 1, "name": "probability and statistics"}, {"inpho_id": 20146, "depth": 1, "name": "philosophy of physics"}, {"inpho_id": 20128, "depth": 2, "name": "cosmology"}, {"inpho_id": 20145, "depth": 2, "name": "quantum mechanics"}, {"inpho_id": 20207, "depth": 2, "name": "time travel"}, {"inpho_id": 20279, "depth": 2, "name": "statistical mechanics and thermodynamics"}, {"inpho_id": 20294, "depth": 2, "name": "philosophy of space and time"}, {"inpho_id": 20148, "depth": 1, "name": "logic"}, {"inpho_id": 20151, "depth": 2, "name": "inductive logic and decision theory"}, {"inpho_id": 20214, "depth": 3, "name": "decision theory"}, {"inpho_id": 20217, "depth": 3, "name": "game theory"}, {"inpho_id": 20208, "depth": 2, "name": "philosophical logic"}, {"inpho_id": 20301, "depth": 3, "name": "modal logic"}, {"inpho_id": 20324, "depth": 3, "name": "non-classical logic"}, {"inpho_id": 20325, "depth": 3, "name": "deontic logic"}, {"inpho_id": 20209, "depth": 2, "name": "mathematical logic"}, {"inpho_id": 20220, "depth": 3, "name": "boolean algebra"}, {"inpho_id": 20251, "depth": 3, "name": "proof theory"}, {"inpho_id": 20270, "depth": 3, "name": "set theory"}, {"inpho_id": 20366, "depth": 3, "name": "type theory"}, {"inpho_id": 20210, "depth": 2, "name": "history of logic"}, {"inpho_id": 20328, "depth": 2, "name": "philosophy of logic"}, {"inpho_id": 20272, "depth": 3, "name": "paradox"}, {"inpho_id": 20361, "depth": 2, "name": "logic and computation"}, {"inpho_id": 20150, "depth": 1, "name": "philosophy of mind"}, {"inpho_id": 20178, "depth": 2, "name": "consciousness"}, {"inpho_id": 20119, "depth": 3, "name": "aspects of consciousness"}, {"inpho_id": 20265, "depth": 3, "name": "qualia"}, {"inpho_id": 20180, "depth": 2, "name": "mental content"}, {"inpho_id": 20182, "depth": 3, "name": "theories of mental content"}, {"inpho_id": 20297, "depth": 3, "name": "propositional attitude"}, {"inpho_id": 20205, "depth": 2, "name": "perception"}, {"inpho_id": 20357, "depth": 3, "name": "perceptual experience"}, {"inpho_id": 20295, "depth": 2, "name": "philosophy of psychology"}, {"inpho_id": 20118, "depth": 3, "name": "aspects of mind"}, {"inpho_id": 20330, "depth": 3, "name": "folk psychology"}, {"inpho_id": 20331, "depth": 3, "name": "cognitive science"}, {"inpho_id": 20329, "depth": 2, "name": "artificial intelligence"}, {"inpho_id": 20333, "depth": 3, "name": "thinking machine"}, {"inpho_id": 20363, "depth": 3, "name": "computationalism"}, {"inpho_id": 20336, "depth": 2, "name": "metaphysics of mind"}, {"inpho_id": 20136, "depth": 3, "name": "mind-body problem"}, {"inpho_id": 20290, "depth": 4, "name": "physicalism"}, {"inpho_id": 20147, "depth": 3, "name": "free will"}, {"inpho_id": 20305, "depth": 3, "name": "personal identity"}, {"inpho_id": 20153, "depth": 1, "name": "philosophy of language"}, {"inpho_id": 20167, "depth": 2, "name": "compositionality and logical form"}, {"inpho_id": 20141, "depth": 3, "name": "logical form"}, {"inpho_id": 20232, "depth": 2, "name": "semantics"}, {"inpho_id": 20168, "depth": 3, "name": "truth"}, {"inpho_id": 20200, "depth": 3, "name": "reference and denotation"}, {"inpho_id": 20201, "depth": 3, "name": "semantic puzzle"}, {"inpho_id": 20202, "depth": 3, "name": "expression and idiom"}, {"inpho_id": 20370, "depth": 2, "name": "pragmatics"}, {"inpho_id": 20177, "depth": 1, "name": "feminist philosophy"}, {"inpho_id": 20341, "depth": 2, "name": "methods in feminism"}, {"inpho_id": 20185, "depth": 1, "name": "philosophy of biology"}, {"inpho_id": 20125, "depth": 2, "name": "developmental biology"}, {"inpho_id": 20129, "depth": 2, "name": "ecology and conservation"}, {"inpho_id": 20131, "depth": 2, "name": "function and teleology"}, {"inpho_id": 20132, "depth": 2, "name": "molecular biology and genetics"}, {"inpho_id": 20189, "depth": 2, "name": "evolution"}, {"inpho_id": 20193, "depth": 1, "name": "philosophy of mathematics"}, {"inpho_id": 20203, "depth": 1, "name": "philosophy of law"}, {"inpho_id": 20359, "depth": 2, "name": "legal reasoning"}, {"inpho_id": 20228, "depth": 1, "name": "philosophy of computer science"}, {"inpho_id": 20238, "depth": 1, "name": "ethics"}, {"inpho_id": 20212, "depth": 2, "name": "normative ethics"}, {"inpho_id": 20332, "depth": 2, "name": "applied ethics"}, {"inpho_id": 20243, "depth": 3, "name": "bioethics"}, {"inpho_id": 20335, "depth": 3, "name": "ethics and information technology"}, {"inpho_id": 20369, "depth": 2, "name": "metaethics"}, {"inpho_id": 20116, "depth": 3, "name": "internalism"}, {"inpho_id": 20288, "depth": 3, "name": "moral reasoning"}, {"inpho_id": 20289, "depth": 3, "name": "moral epistemology"}, {"inpho_id": 20303, "depth": 3, "name": "externalism"}, {"inpho_id": 20239, "depth": 1, "name": "epistemology"}, {"inpho_id": 20114, "depth": 2, "name": "social epistemology"}, {"inpho_id": 20115, "depth": 2, "name": "naturalized epistemology"}, {"inpho_id": 20163, "depth": 2, "name": "knowledge sources"}, {"inpho_id": 20172, "depth": 2, "name": "justification"}, {"inpho_id": 20215, "depth": 3, "name": "bayesianism"}, {"inpho_id": 20241, "depth": 3, "name": "internalism and externalism"}, {"inpho_id": 20277, "depth": 3, "name": "foundationalism"}, {"inpho_id": 20278, "depth": 3, "name": "coherentism"}, {"inpho_id": 20344, "depth": 2, "name": "knowledge and skepticism"}, {"inpho_id": 20123, "depth": 3, "name": "skepticism"}, {"inpho_id": 20267, "depth": 3, "name": "knowledge"}, {"inpho_id": 20273, "depth": 1, "name": "philosophy of sociology"}, {"inpho_id": 20291, "depth": 1, "name": "philosophy of religion"}, {"inpho_id": 20176, "depth": 2, "name": "religion and politics"}, {"inpho_id": 20245, "depth": 2, "name": "god"}, {"inpho_id": 20199, "depth": 3, "name": "existence of god"}, {"inpho_id": 20246, "depth": 3, "name": "divine attributes"}, {"inpho_id": 20248, "depth": 2, "name": "epistemology of religion"}, {"inpho_id": 20266, "depth": 3, "name": "faith and reason"}, {"inpho_id": 20275, "depth": 3, "name": "revelation"}, {"inpho_id": 20257, "depth": 2, "name": "afterlife"}, {"inpho_id": 20293, "depth": 1, "name": "philosophy of science"}, {"inpho_id": 20164, "depth": 2, "name": "epistemology of science"}, {"inpho_id": 20130, "depth": 3, "name": "models and idealization"}, {"inpho_id": 20188, "depth": 3, "name": "scientific theory"}, {"inpho_id": 20198, "depth": 4, "name": "probability"}, {"inpho_id": 20252, "depth": 3, "name": "explanation"}, {"inpho_id": 20165, "depth": 2, "name": "metaphysics of science"}, {"inpho_id": 20287, "depth": 3, "name": "causation"}, {"inpho_id": 20285, "depth": 4, "name": "cause and effect"}, {"inpho_id": 20260, "depth": 2, "name": "science and religion"}, {"inpho_id": 20356, "depth": 1, "name": "metaphysics"}, {"inpho_id": 20158, "depth": 2, "name": "facts"}, {"inpho_id": 20160, "depth": 2, "name": "object"}, {"inpho_id": 20166, "depth": 2, "name": "property"}, {"inpho_id": 20196, "depth": 2, "name": "relations"}, {"inpho_id": 20298, "depth": 2, "name": "change"}, {"inpho_id": 20323, "depth": 2, "name": "space and time"}, {"inpho_id": 20117, "depth": 3, "name": "matter"}, {"inpho_id": 20197, "depth": 3, "name": "time"}, {"inpho_id": 20271, "depth": 3, "name": "supertasks"}, {"inpho_id": 20292, "depth": 3, "name": "spacetime"}, {"inpho_id": 20345, "depth": 2, "name": "existence"}, {"inpho_id": 20173, "depth": 3, "name": "arguments for the existence of god"}, {"inpho_id": 20367, "depth": 1, "name": "philosophy of economics"}], "links": [{"color": "#4daf4a", "source": "T66", "topic": "T66", "target": "aesthetics and philosophy of art", "value": 11348.150000000001}, {"color": "#f781bf", "source": "T87", "topic": "T87", "target": "aesthetics and philosophy of art", "value": 4575.1500000000005}, {"color": "#f781bf", "source": "T103", "topic": "T103", "target": "aesthetics and philosophy of art", "value": 4171.1500000000015}, {"color": "#4daf4a", "source": "aesthetics and philosophy of art", "topic": "T66", "target": "philosophy of art", "value": 1966.03}, {"color": "#f781bf", "source": "aesthetics and philosophy of art", "topic": "T87", "target": "philosophy of art", "value": 942.02999999999997}, {"color": "#f781bf", "source": "aesthetics and philosophy of art", "topic": "T103", "target": "philosophy of art", "value": 1583.03}, {"color": "#4daf4a", "source": "philosophy of art", "topic": "T66", "target": "artistic form", "value": 1816.01}, {"color": "#f781bf", "source": "philosophy of art", "topic": "T87", "target": "artistic form", "value": 685.00999999999999}, {"color": "#f781bf", "source": "philosophy of art", "topic": "T103", "target": "artistic form", "value": 421.00999999999999}, {"color": "#4daf4a", "source": "philosophy of art", "topic": "T66", "target": "reception", "value": 150.00999999999999}, {"color": "#f781bf", "source": "philosophy of art", "topic": "T87", "target": "reception", "value": 257.00999999999999}, {"color": "#f781bf", "source": "philosophy of art", "topic": "T103", "target": 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{"color": "#f781bf", "source": "space and time", "topic": "T87", "target": "time", "value": 723.03999999999996}, {"color": "#f781bf", "source": "space and time", "topic": "T87", "target": "supertasks", "value": 1542.02}, {"color": "#f781bf", "source": "space and time", "topic": "T87", "target": "spacetime", "value": 1015.02}, {"color": "#f781bf", "source": "metaphysics", "topic": "T87", "target": "existence", "value": 1818.0699999999999}, {"color": "#f781bf", "source": "existence", "topic": "T87", "target": "arguments for the existence of god", "value": 1501.05}, {"color": "#4daf4a", "source": "T90", "topic": "T90", "target": "philosophy of economics", "value": 1928.02}, {"color": "#974fa2", "source": "T43", "topic": "T43", "target": "philosophy of economics", "value": 1646.02}, {"color": "#fffe33", "source": "T93", "topic": "T93", "target": "philosophy of economics", "value": 1238.02}, {"color": "#4daf4a", "source": "T50", "topic": "T50", "target": "philosophy of economics", "value": 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d3.sankey = function() {
var sankey = {},
nodeWidth = 24,
nodePadding = 8,
size = [1, 1],
nodes = [],
links = [];
sankey.nodeWidth = function(_) {
if (!arguments.length) return nodeWidth;
nodeWidth = +_;
return sankey;
};
sankey.nodePadding = function(_) {
if (!arguments.length) return nodePadding;
nodePadding = +_;
return sankey;
};
sankey.nodes = function(_) {
if (!arguments.length) return nodes;
nodes = _;
return sankey;
};
sankey.links = function(_) {
if (!arguments.length) return links;
links = _;
return sankey;
};
sankey.size = function(_) {
if (!arguments.length) return size;
size = _;
return sankey;
};
sankey.layout = function(iterations) {
computeNodeLinks();
computeNodeValues();
computeNodeBreadths();
computeNodeDepths(iterations);
computeLinkDepths();
return sankey;
};
sankey.relayout = function() {
computeLinkDepths();
return sankey;
};
sankey.link = function() {
var curvature = .5;
function link(d) {
var x0 = d.source.x + d.source.dx,
x1 = d.target.x,
xi = d3.interpolateNumber(x0, x1),
x2 = xi(curvature),
x3 = xi(1 - curvature),
y0 = d.source.y + d.sy + d.dy / 2,
y1 = d.target.y + d.ty + d.dy / 2;
return "M" + x0 + "," + y0
+ "C" + x2 + "," + y0
+ " " + x3 + "," + y1
+ " " + x1 + "," + y1;
}
link.curvature = function(_) {
if (!arguments.length) return curvature;
curvature = +_;
return link;
};
return link;
};
// Populate the sourceLinks and targetLinks for each node.
// Also, if the source and target are not objects, assume they are indices.
function computeNodeLinks() {
nodes.forEach(function(node) {
node.sourceLinks = [];
node.targetLinks = [];
});
links.forEach(function(link) {
var source = link.source,
target = link.target;
if (typeof source === "number") source = link.source = nodes[link.source];
if (typeof target === "number") target = link.target = nodes[link.target];
source.sourceLinks.push(link);
target.targetLinks.push(link);
});
}
// Compute the value (size) of each node by summing the associated links.
function computeNodeValues() {
nodes.forEach(function(node) {
node.value = Math.max(
d3.sum(node.sourceLinks, value),
d3.sum(node.targetLinks, value)
);
});
}
// Iteratively assign the breadth (x-position) for each node.
// Nodes are assigned the maximum breadth of incoming neighbors plus one;
// nodes with no incoming links are assigned breadth zero, while
// nodes with no outgoing links are assigned the maximum breadth.
function computeNodeBreadths() {
var remainingNodes = nodes,
nextNodes,
x = 0;
while (remainingNodes.length) {
nextNodes = [];
remainingNodes.forEach(function(node) {
node.x = x;
node.dx = nodeWidth;
node.sourceLinks.forEach(function(link) {
nextNodes.push(link.target);
});
});
remainingNodes = nextNodes;
++x;
}
//
//moveSinksRight(x);
scaleNodeBreadths((size[0] - nodeWidth) / (x - 1));
}
function moveSourcesRight() {
nodes.forEach(function(node) {
if (!node.targetLinks.length) {
node.x = d3.min(node.sourceLinks, function(d) { return d.target.x; }) - 1;
}
});
}
function moveSinksRight(x) {
nodes.forEach(function(node) {
if (!node.sourceLinks.length) {
// node.x = x - 1;
}
});
}
function scaleNodeBreadths(kx) {
nodes.forEach(function(node) {
node.x *= kx;
});
}
function computeNodeDepths(iterations) {
var nodesByBreadth = d3.nest()
.key(function(d) { return d.depth; })
.sortKeys(d3.ascending)
.entries(nodes)
.map(function(d) { return d.values; });
//
initializeNodeDepth();
resolveCollisions();
for (var alpha = 1; iterations > 0; --iterations) {
relaxRightToLeft(alpha *= .99);
resolveCollisions();
relaxLeftToRight(alpha);
resolveCollisions();
}
function initializeNodeDepth() {
var ky = d3.min(nodesByBreadth, function(nodes) {
return (size[1] - (nodes.length - 1) * nodePadding) / d3.sum(nodes, value);
});
nodesByBreadth.forEach(function(nodes) {
nodes.forEach(function(node, i) {
node.y = i;
node.dy = node.value * ky;
});
});
links.forEach(function(link) {
link.dy = link.value * ky;
});
}
function relaxLeftToRight(alpha) {
nodesByBreadth.forEach(function(nodes, breadth) {
nodes.forEach(function(node) {
if (node.targetLinks.length) {
var y = d3.sum(node.targetLinks, weightedSource) / d3.sum(node.targetLinks, value);
node.y += (y - center(node)) * alpha;
}
});
});
function weightedSource(link) {
return center(link.source) * link.value;
}
}
function relaxRightToLeft(alpha) {
nodesByBreadth.slice().reverse().forEach(function(nodes) {
nodes.forEach(function(node) {
if (node.sourceLinks.length) {
var y = d3.sum(node.sourceLinks, weightedTarget) / d3.sum(node.sourceLinks, value);
node.y += (y - center(node)) * alpha;
}
});
});
function weightedTarget(link) {
return center(link.target) * link.value;
}
}
function resolveCollisions() {
nodesByBreadth.forEach(function(nodes) {
var node,
dy,
y0 = 0,
n = nodes.length,
i;
// Push any overlapping nodes down.
nodes.sort(ascendingDepth);
for (i = 0; i < n; ++i) {
node = nodes[i];
dy = y0 - node.y;
if (dy > 0) node.y += dy;
y0 = node.y + node.dy + nodePadding;
}
// If the bottommost node goes outside the bounds, push it back up.
dy = y0 - nodePadding - size[1];
if (dy > 0) {
y0 = node.y -= dy;
// Push any overlapping nodes back up.
for (i = n - 2; i >= 0; --i) {
node = nodes[i];
dy = node.y + node.dy + nodePadding - y0;
if (dy > 0) node.y -= dy;
y0 = node.y;
}
}
});
}
function ascendingDepth(a, b) {
return a.y - b.y;
}
}
function computeLinkDepths() {
nodes.forEach(function(node) {
node.sourceLinks.sort(ascendingTargetDepth);
node.targetLinks.sort(ascendingSourceDepth);
});
nodes.forEach(function(node) {
var sy = 0, ty = 0;
node.sourceLinks.forEach(function(link) {
link.sy = sy;
sy += link.dy;
});
node.targetLinks.forEach(function(link) {
link.ty = ty;
ty += link.dy;
});
});
function ascendingSourceDepth(a, b) {
return a.source.y - b.source.y;
}
function ascendingTargetDepth(a, b) {
return a.target.y - b.target.y;
}
}
function center(node) {
return node.y + node.dy / 2;
}
function value(link) {
return link.value;
}
return sankey;
};
{"nodes": [{"color": "#974fa2", "name": "T3", "words": "selection, species, evolutionary, biological, biology, genetic, evolution, genes, organisms, population"}, {"color": "#ff8000", "name": "T4", "words": "quantum, mechanics, measurement, space, systems, field, spacetime, classical, physics, relativity"}, {"color": "#fffe33", "name": "T5", "words": "understanding, within, role, often, approach, various, central, specific, ways, indeed"}, {"color": "#a7572a", "name": "T6", "words": "legal, justice, principles, rawls, public, authority, rules, reasons, obligation, obligations"}, {"color": "#e41a1c", "name": "T8", "words": "art, aesthetic, beauty, aesthetics, works, music, beautiful, poetry, taste, nietzsche"}, {"color": "#4daf4a", "name": "T10", "words": "women, feminist, gender, men, feminists, sexual, sex, woman, male, race"}, {"color": "#974fa2", "name": "T11", "words": "rights, liberal, government, citizens, group, power, international, freedom, democratic, institutions"}, {"color": "#ff8000", "name": "T12", "words": "change, space, 3, three, present, points, line, infinite, following, b"}, {"color": "#fffe33", "name": "T13", "words": "pleasure, virtue, morality, hume, happiness, mill, love, ethical, ethics, desire"}, {"color": "#a7572a", "name": "T14", "words": "worlds, modal, identity, exist, ontological, lewis, property, affairs, entities, facts"}, {"color": "#e41a1c", "name": "T16", "words": "information, computer, turing, al, cognitive, behavior, data, systems, machine, computational"}, {"color": "#397db6", "name": "T17", "words": "game, utility, preferences, player, choice, strategy, preference, decision, agents, expected"}, {"color": "#4daf4a", "name": "T18", "words": "beliefs, justification, justified, epistemic, know, evidence, proposition, believe, propositions, believing"}, {"color": "#974fa2", "name": "T19", "words": "substance, relations, parts, real, categories, thing, kinds, entities, substances, material"}, {"color": "#fffe33", "name": "T21", "words": "mental, consciousness, content, experiences, perception, conscious, perceptual, phenomenal, memory, contents"}, {"color": "#a7572a", "name": "T22", "words": "mathematical, mathematics, numbers, x, proof, sets, theorem, axioms, arithmetic, type"}, {"color": "#f781bf", "name": "T23", "words": "aristotle, medieval, ockham, proposition, term, scotus, propositions, socrates, subject, man"}, {"color": "#e41a1c", "name": "T24", "words": "probability, evidence, h, probabilities, hypothesis, hypotheses, probabilistic, e, chance, inductive"}, {"color": "#397db6", "name": "T25", "words": "causal, cause, events, explanation, causation, laws, mental, causes, event, explanations"}, {"color": "#4daf4a", "name": "T26", "words": "divine, religious, evil, religion, faith, power, christian, free, universe, theological"}, {"color": "#a7572a", "name": "T30", "words": "scientific, empirical, theoretical, sciences, logical, method, peirce, carnap, kuhn, physics"}, {"color": "#f781bf", "name": "T31", "words": "meaning, sentence, sentences, semantic, proposition, propositions, speaker, expressions, content, linguistic"}, {"color": "#e41a1c", "name": "T32", "words": "kant, transcendental, idealism, judgment, space, pure, concepts, empirical, ideas, representations"}, {"color": "#397db6", "name": "T33", "words": "child, death, persons, respect, children, status, morally, harm, interests, future"}, {"color": "#4daf4a", "name": "T34", "words": "think, arguments, seem, claims, sort, perhaps, version, need, n't, e.g"}, {"color": "#974fa2", "name": "T35", "words": "x, logical, b, semantics, rules, logics, formula, y, classical, f"}, {"color": "#ff8000", "name": "T36", "words": "health, equality, research, disability, justice, individuals, care, opportunity, medical, society"}, {"color": "#fffe33", "name": "T37", "words": "punishment, harm, war, criminal, privacy, wrong, pornography, morally, civil, violence"}, {"color": "#f781bf", "name": "T39", "words": "beliefs, evidence, judgments, reasoning, epistemic, judgment, normative, claims, arguments, values"}, {"name": "aesthetics and philosophy of art"}, {"name": "history of philosophy"}, {"name": "social and political philosophy"}, {"name": "probability and statistics"}, {"name": "philosophy of physics"}, {"name": "logic"}, {"name": "philosophy of mind"}, {"name": "philosophy of language"}, {"name": "feminist philosophy"}, {"name": "philosophy of biology"}, {"name": "philosophy of mathematics"}, {"name": "philosophy of law"}, {"name": "philosophy of computer science"}, {"name": "ethics"}, {"name": "epistemology"}, {"name": "philosophy of sociology"}, {"name": "philosophy of religion"}, {"name": "philosophy of science"}, {"name": "metaphysics"}, {"name": "philosophy of economics"}], "links": [{"color": "#e41a1c", "source": "T8", "topic": "T8", "target": "aesthetics and philosophy of art", "value": 15093.150000000001}, {"color": "#fffe33", "source": "T5", "topic": "T5", "target": "aesthetics and philosophy of 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