An attempt to visualize bibliographic (Dewey) metadata with D3 based on Kerry Rodden's Sunburst
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Bibliographic metadata sunburst
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<title>Metadata sunburst</title> | |
<script src="https://d3js.org/d3.v3.min.js"></script> | |
<link rel="stylesheet" type="text/css" | |
href="https://fonts.googleapis.com/css?family=Open+Sans:400,600"> | |
<link rel="stylesheet" type="text/css" href="sequences.css"/> | |
</head> | |
<body> | |
<div id="main"> | |
<div id="sequence"></div> | |
<div id="chart"> | |
<div id="explanation" style="visibility: hidden;"> | |
<span id="percentage"></span><br/> | |
of Dewey classifications begin with this sequence of metadata | |
</div> | |
</div> | |
</div> | |
<div id="sidebar"> | |
<input type="checkbox" id="togglelegend"> Legend<br/> | |
<div id="legend" style="visibility: hidden;"></div> | |
</div> | |
<script type="text/javascript" src="sequences.js"></script> | |
<script type="text/javascript"> | |
// Hack to make this example display correctly in an iframe on bl.ocks.org <-- Esta part no entiendo a qué se refiere | |
d3.select(self.frameElement).style("height", "700px"); | |
</script> | |
</body> | |
</html> |
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socialsciences-economics-production | 21622 | |
---|---|---|
historygeography-historyofnorthamerica-middleamericamexico | 12091 | |
socialsciences-politicalscience-internationalrelations | 7960 | |
socialsciences-economics-laboreconomics | 7344 | |
socialsciences-economics-financialeconomics | 6529 | |
socialsciences-politicalscience-civilpoliticalrights | 3856 | |
socialsciences-law-lawofnations | 3843 | |
socialsciences-economics-economicsoflandenergy | 3745 | |
computerscienceinformationgeneralworks-bibliography-bibliographiesofworksonspecificsubjects | 3693 | |
literaturerhetoric-spanishportugueseliteratures-spanishfiction | 3576 | |
socialsciences-economics-socialismrelatedsystems | 3554 | |
literaturerhetoric-spanishportugueseliteratures-spanishpoetry | 3443 | |
socialsciences-education-highereducation | 3394 | |
socialsciences-politicalscience-internationalmigrationcolonization | 3172 | |
historygeography-geographytravel-geographyoftravelinnorthamerica | 2837 | |
socialsciences-commercecommunicationstransportation-internationalcommerce | 2676 | |
socialsciences-economics-publicfinance | 2559 | |
historygeography-historyofeurope-iberianpeninsulaadjacentislands | 2475 | |
socialsciences-law-constitutionaladministrativelaw | 2436 | |
technology-managementauxiliaryservices-generalmanagement | 2246 | |
socialsciences-politicalscience-systemsofgovernmentsstates | 2233 | |
socialsciences-economics-macroeconomicsrelatedtopics | 2041 | |
computerscienceinformationgeneralworks-libraryinformationsciences-libraryoperations | 2000 | |
literaturerhetoric-literaturesofotherlanguages-literaturesofeastsoutheastasia | 1972 | |
computerscienceinformationgeneralworks-generalcollections-collectionsinenglish | 1912 | |
socialsciences-politicalscience-thepoliticalprocess | 1824 | |
literaturerhetoric-literaturesofromancelanguages-frenchfiction | 1823 | |
socialsciences-publicadministrationmilitaryscience-militaryscience | 1816 | |
literaturerhetoric-americanliteratureinenglish-americanfictioninenglish | 1789 | |
historygeography-geographytravel-geographyoftravelinsouthamerica | 1784 | |
historygeography-geographytravel-geographyoftravelinasia | 1728 | |
socialsciences-socialproblemsservicesassociations-socialwelfareproblemsservices | 1727 | |
religion-otherreligions-religionsofindicorigin | 1689 | |
historygeography-geographytravel-geographyoftravelineurope | 1668 | |
socialsciences-economics-internationaleconomics | 1581 | |
theartsfinedecorativearts-paintingpaintings-historicalgeographicpersonstreatment | 1543 | |
historygeography-historyofnorthamerica-unitedstates | 1493 | |
naturalsciencesandmathemetics-lifesciencesbiology-biochemistry | 1477 | |
literaturerhetoric-literaturesofotherlanguages-eastindoeuropeancelticliteratures | 1472 | |
literaturerhetoric-englisholdenglishliteratures-englishfiction | 1434 | |
literaturerhetoric-spanishportugueseliteratures-spanishdrama | 1307 | |
socialsciences-education-schoolstheiractivitiesspecialeducation | 1238 | |
socialsciences-publicadministrationmilitaryscience-generalconsiderationsofpublicadministration | 1237 | |
socialsciences-socialproblemsservicesassociations-criminology | 1226 | |
socialsciences-law-civilprocedurecourts | 1178 | |
historygeography-historyofasiafareast-chinaadjacentareas | 1143 | |
historygeography-biographygenealogyinsignia-optionalnumber | 1113 | |
socialsciences-customsetiquettefolklore-folklore | 1092 | |
language-linguistics-grammar | 1085 | |
historygeography-geographytravel-geographyoftravelinancientworld | 1047 |
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body { | |
font-family: 'Open Sans', sans-serif; | |
font-size: 12px; | |
font-weight: 400; | |
background-color: #fff; | |
width: 960px; | |
height: 700px; | |
margin-top: 10px; | |
} | |
#main { | |
float: left; | |
width: 750px; | |
} | |
#sidebar { | |
float: right; | |
width: 100px; | |
} | |
#sequence { | |
width: 600px; | |
height: 70px; | |
} | |
#legend { | |
padding: 10px 0 0 3px; | |
} | |
#sequence text, #legend text { | |
font-weight: 600; | |
fill: #fff; | |
} | |
#chart { | |
position: relative; | |
} | |
#chart path { | |
stroke: #fff; | |
} | |
#explanation { | |
position: absolute; | |
top: 260px; | |
left: 305px; | |
width: 140px; | |
text-align: center; | |
color: #666; | |
z-index: -1; | |
} | |
#percentage { | |
font-size: 2.5em; | |
} |
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// Dimensions of sunburst. | |
var width = 750; | |
var height = 600; | |
var radius = Math.min(width, height) / 2; | |
// Breadcrumb dimensions: width, height, spacing, width of tip/tail. | |
var b = { | |
w: 75, h: 30, s: 3, t: 10 | |
}; | |
// Mapping of step names to colors. | |
/* | |
SILVIA'S NOTE: In my data there are 825 variables & not 6 like in Rodden's | |
I'm guessing this is part of the problem? | |
NOTA SILVIA: En mis datos hay 825 variables y no seis como en el ejemplo | |
¿supongo que esto puede ser un problema? | |
*/ | |
/* | |
I TRIED THESE: | |
var color = d3.scaleOrdinal(d3.schemeCategory20); <-- d3 v4 | |
var colors = d3.scale.category20(); <--d3 v3 | |
*/ | |
var colors = d3.scale.category20(); | |
/* | |
var colors = { | |
"home": "#5687d1", | |
"product": "#7b615c", | |
"search": "#de783b", | |
"account": "#6ab975", | |
"other": "#a173d1", | |
"end": "#bbbbbb" | |
}; | |
*/ | |
// Total size of all segments; we set this later, after loading the data. | |
var totalSize = 0; | |
var vis = d3.select("#chart").append("svg:svg") | |
.attr("width", width) | |
.attr("height", height) | |
.append("svg:g") | |
.attr("id", "container") | |
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")"); | |
var partition = d3.layout.partition() | |
.size([2 * Math.PI, radius * radius]) | |
.value(function(d) { return d.size; }); | |
var arc = d3.svg.arc() | |
.startAngle(function(d) { return d.x; }) | |
.endAngle(function(d) { return d.x + d.dx; }) | |
.innerRadius(function(d) { return Math.sqrt(d.y); }) | |
.outerRadius(function(d) { return Math.sqrt(d.y + d.dy); }); | |
// Use d3.text and d3.csv.parseRows so that we do not need to have a header | |
// row, and can receive the csv as an array of arrays. | |
d3.text("metadata-sequence.csv", function(text) { | |
var csv = d3.csv.parseRows(text); | |
var json = buildHierarchy(csv); | |
createVisualization(json); | |
}); | |
// Main function to draw and set up the visualization, once we have the data. | |
function createVisualization(json) { | |
// Basic setup of page elements. | |
initializeBreadcrumbTrail(); | |
drawLegend(); | |
d3.select("#togglelegend").on("click", toggleLegend); | |
// Bounding circle underneath the sunburst, to make it easier to detect | |
// when the mouse leaves the parent g. | |
vis.append("svg:circle") | |
.attr("r", radius) | |
.style("opacity", 0); | |
// For efficiency, filter nodes to keep only those large enough to see. | |
var nodes = partition.nodes(json) | |
.filter(function(d) { | |
return (d.dx > 0.005); // 0.005 radians = 0.29 degrees | |
}); | |
var path = vis.data([json]).selectAll("path") | |
.data(nodes) | |
.enter().append("svg:path") | |
.attr("display", function(d) { return d.depth ? null : "none"; }) | |
.attr("d", arc) | |
.attr("fill-rule", "evenodd") | |
.style("fill", function(d) { return colors(d.name); }) // need to call this as a function, not as an object key in the original example | |
.style("opacity", 1) | |
.on("mouseover", mouseover); | |
// Add the mouseleave handler to the bounding circle. | |
d3.select("#container").on("mouseleave", mouseleave); | |
// Get total size of the tree = value of root node from partition. | |
totalSize = path.node().__data__.value; | |
}; | |
// Fade all but the current sequence, and show it in the breadcrumb trail. | |
function mouseover(d) { | |
var percentage = (100 * d.value / totalSize).toPrecision(3); | |
var percentageString = percentage + "%"; | |
if (percentage < 0.1) { | |
percentageString = "< 0.1%"; | |
} | |
d3.select("#percentage") | |
.text(percentageString); | |
d3.select("#explanation") | |
.style("visibility", ""); | |
var sequenceArray = getAncestors(d); | |
updateBreadcrumbs(sequenceArray, percentageString); | |
// Fade all the segments. | |
d3.selectAll("path") | |
.style("opacity", 0.3); | |
// Then highlight only those that are an ancestor of the current segment. | |
vis.selectAll("path") | |
.filter(function(node) { | |
return (sequenceArray.indexOf(node) >= 0); | |
}) | |
.style("opacity", 1); | |
} | |
// Restore everything to full opacity when moving off the visualization. | |
function mouseleave(d) { | |
// Hide the breadcrumb trail | |
d3.select("#trail") | |
.style("visibility", "hidden"); | |
// Deactivate all segments during transition. | |
d3.selectAll("path").on("mouseover", null); | |
// Transition each segment to full opacity and then reactivate it. | |
d3.selectAll("path") | |
.transition() | |
.duration(1000) | |
.style("opacity", 1) | |
.each("end", function() { | |
d3.select(this).on("mouseover", mouseover); | |
}); | |
d3.select("#explanation") | |
.style("visibility", "hidden"); | |
} | |
// Given a node in a partition layout, return an array of all of its ancestor | |
// nodes, highest first, but excluding the root. | |
function getAncestors(node) { | |
var path = []; | |
var current = node; | |
while (current.parent) { | |
path.unshift(current); | |
current = current.parent; | |
} | |
return path; | |
} | |
function initializeBreadcrumbTrail() { | |
// Add the svg area. | |
var trail = d3.select("#sequence").append("svg:svg") | |
.attr("width", width) | |
.attr("height", 50) | |
.attr("id", "trail"); | |
// Add the label at the end, for the percentage. | |
trail.append("svg:text") | |
.attr("id", "endlabel") | |
.style("fill", "#000"); | |
} | |
// Generate a string that describes the points of a breadcrumb polygon. | |
function breadcrumbPoints(d, i) { | |
var points = []; | |
points.push("0,0"); | |
points.push(b.w + ",0"); | |
points.push(b.w + b.t + "," + (b.h / 2)); | |
points.push(b.w + "," + b.h); | |
points.push("0," + b.h); | |
if (i > 0) { // Leftmost breadcrumb; don't include 6th vertex. | |
points.push(b.t + "," + (b.h / 2)); | |
} | |
return points.join(" "); | |
} | |
// Update the breadcrumb trail to show the current sequence and percentage. | |
function updateBreadcrumbs(nodeArray, percentageString) { | |
// Data join; key function combines name and depth (= position in sequence). | |
var g = d3.select("#trail") | |
.selectAll("g") | |
.data(nodeArray, function(d) { return d.name + d.depth; }); | |
// Add breadcrumb and label for entering nodes. | |
var entering = g.enter().append("svg:g"); | |
entering.append("svg:polygon") | |
.attr("points", breadcrumbPoints) | |
.style("fill", function(d) { return colors[d.name]; }); | |
entering.append("svg:text") | |
.attr("x", (b.w + b.t) / 2) | |
.attr("y", b.h / 2) | |
.attr("dy", "0.35em") | |
.attr("text-anchor", "middle") | |
.text(function(d) { return d.name; }); | |
// Set position for entering and updating nodes. | |
g.attr("transform", function(d, i) { | |
return "translate(" + i * (b.w + b.s) + ", 0)"; | |
}); | |
// Remove exiting nodes. | |
g.exit().remove(); | |
// Now move and update the percentage at the end. | |
d3.select("#trail").select("#endlabel") | |
.attr("x", (nodeArray.length + 0.5) * (b.w + b.s)) | |
.attr("y", b.h / 2) | |
.attr("dy", "0.35em") | |
.attr("text-anchor", "middle") | |
.text(percentageString); | |
// Make the breadcrumb trail visible, if it's hidden. | |
d3.select("#trail") | |
.style("visibility", ""); | |
} | |
function drawLegend() { | |
// Dimensions of legend item: width, height, spacing, radius of rounded rect. | |
var li = { | |
w: 75, h: 30, s: 3, r: 3 | |
}; | |
var legend = d3.select("#legend").append("svg:svg") | |
.attr("width", li.w) | |
.attr("height", d3.keys(colors).length * (li.h + li.s)); | |
var g = legend.selectAll("g") | |
.data(d3.entries(colors)) | |
.enter().append("svg:g") | |
.attr("transform", function(d, i) { | |
return "translate(0," + i * (li.h + li.s) + ")"; | |
}); | |
g.append("svg:rect") | |
.attr("rx", li.r) | |
.attr("ry", li.r) | |
.attr("width", li.w) | |
.attr("height", li.h) | |
.style("fill", function(d) { return d.value; }); | |
g.append("svg:text") | |
.attr("x", li.w / 2) | |
.attr("y", li.h / 2) | |
.attr("dy", "0.35em") | |
.attr("text-anchor", "middle") | |
.text(function(d) { return d.key; }); | |
} | |
function toggleLegend() { | |
var legend = d3.select("#legend"); | |
if (legend.style("visibility") == "hidden") { | |
legend.style("visibility", ""); | |
} else { | |
legend.style("visibility", "hidden"); | |
} | |
} | |
// Take a 2-column CSV and transform it into a hierarchical structure suitable | |
// for a partition layout. The first column is a sequence of step names, from | |
// root to leaf, separated by hyphens. The second column is a count of how | |
// often that sequence occurred. | |
function buildHierarchy(csv) { | |
var root = {"name": "root", "children": []}; | |
for (var i = 0; i < csv.length; i++) { | |
var sequence = csv[i][0]; | |
var size = +csv[i][1]; | |
if (isNaN(size)) { // e.g. if this is a header row | |
continue; | |
} | |
var parts = sequence.split("-"); | |
var currentNode = root; | |
for (var j = 0; j < parts.length; j++) { | |
var children = currentNode["children"]; | |
var nodeName = parts[j]; | |
var childNode; | |
if (j + 1 < parts.length) { | |
// Not yet at the end of the sequence; move down the tree. | |
var foundChild = false; | |
for (var k = 0; k < children.length; k++) { | |
if (children[k]["name"] == nodeName) { | |
childNode = children[k]; | |
foundChild = true; | |
break; | |
} | |
} | |
// If we don't already have a child node for this branch, create it. | |
if (!foundChild) { | |
childNode = {"name": nodeName, "children": []}; | |
children.push(childNode); | |
} | |
currentNode = childNode; | |
} else { | |
// Reached the end of the sequence; create a leaf node. | |
childNode = {"name": nodeName, "size": size}; | |
children.push(childNode); | |
} | |
} | |
} | |
return root; | |
}; |
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