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hierarchical bars.html
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<!DOCTYPE html>
<meta charset="utf-8">
<style>
text {
font: 10px sans-serif;
}
rect.background {
fill: white;
}
.axis {
shape-rendering: crispEdges;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
}
div #svgDiv {
width: 960;
height: 500;
overflow-y: scroll;
}
</style>
<body>
<h1>Hierarchical Bars</h1>
<div id="svgDiv"></div>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var margin = {top: 30, right: 120, bottom: 0, left: 120},
width = 1000 - margin.left - margin.right,
height = 1500 - margin.top - margin.bottom;
var x = d3.scale.linear()
.range([0, width]);
var barHeight = 20;
var color = d3.scale.ordinal()
.range(["steelblue", "#ccc"]);
//var duration = 750,
// delay = 25;
var duration = 250, delay = 10;
var partition = d3.layout.partition()
.value(function(d) { return d.size; });
var xAxis = d3.svg.axis()
.scale(x)
.orient("top");
var svg = d3.select("#svgDiv").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.attr("id", "svg")
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
svg.append("rect")
.attr("class", "background")
.attr("width", width)
.attr("height", height)
.on("click", up);
svg.append("g")
.attr("class", "x axis");
svg.append("g")
.attr("class", "y axis")
.append("line")
.attr("y1", "100%");
// Gets main keywords -- requirements on minimum word length and frequency
function getKeywords(dataObj, minWordLen, minFreq) {
var fdist = dataObj.fdist;
var keywords = [];
for (var i = 0; i < fdist.length; i++) {
if (fdist[i][1] >= minFreq && fdist[i][0].length >= minWordLen)
{
if ( fdist[i][0]!= "Prof.")
keywords.push(fdist[i]);
}
}
return keywords;
}
d3.json("CSE.json", function(error, data) {
if (error) throw error;
var allCategories = ["Achievement", "Event", "News", "Seminar", "ThesisDefense"];
//var categoryDict = [[], [], [], [], []]
var categoryDict = [{}, {}, {}, {}, {}];
var tree = {"name": "allCategories", "children": []};
for (var i = 0; i < allCategories.length; i++) {
var node = {"name": allCategories[i], "children": []}
tree.children.push(node);
}
for (var i = 0; i < data.length; i++) {
var category = data[i].category;
var indexOfCategory = allCategories.indexOf(category)
var keywords = getKeywords(data[i], 4, 2);
for (var j = 0; j < keywords.length; j++) {
var index = Object.keys(categoryDict[indexOfCategory]).indexOf(keywords[j][0]);
var max = keywords[0][1];
if (index == -1) {
var keyword = keywords[j][0]
categoryDict[indexOfCategory][keyword] = 1;
} else {
categoryDict[indexOfCategory][keyword]++;
}
}
}
for (var i = 0; i < categoryDict.length; i++) {
var keys = Object.keys(categoryDict[i]);
for (var j = 0; j < keys.length; j++) {
var keyword = keys[j]
//var max = Math.max.apply(Math, Object.values(categoryDict[i]));
//if (categoryDict[i][keyword] > 6 || (i == 1 && categoryDict[i][keyword] > 2)) {
if (categoryDict[i][keyword] > 10) {
var node = {"name": keys[j], "size": categoryDict[i][keyword]};
tree.children[i].children.push(node);
}
}
}
console.log(tree)
partition.nodes(tree);
x.domain([0, tree.value]).nice();
down(tree, 0);
});
function down(d, i) {
if (!d.children || this.__transition__) return;
var end = duration + d.children.length * delay;
// Mark any currently-displayed bars as exiting.
var exit = svg.selectAll(".enter")
.attr("class", "exit");
// Entering nodes immediately obscure the clicked-on bar, so hide it.
exit.selectAll("rect").filter(function(p) { return p === d; })
.style("fill-opacity", 1e-6);
// Enter the new bars for the clicked-on data.
// Per above, entering bars are immediately visible.
var enter = bar(d)
.attr("transform", stack(i))
.style("opacity", 1);
// Have the text fade-in, even though the bars are visible.
// Color the bars as parents; they will fade to children if appropriate.
enter.select("text").style("fill-opacity", 1e-6);
enter.select("rect").style("fill", color(true));
// Update the x-scale domain.
x.domain([0, d3.max(d.children, function(d) { return d.value; })]).nice();
// Update the x-axis.
svg.selectAll(".x.axis").transition()
.duration(duration)
.call(xAxis);
// Transition entering bars to their new position.
var enterTransition = enter.transition()
.duration(duration)
.delay(function(d, i) { return i * delay; })
.attr("transform", function(d, i) { return "translate(0," + barHeight * i * 1.2 + ")"; });
// Transition entering text.
enterTransition.select("text")
.style("fill-opacity", 1);
// Transition entering rects to the new x-scale.
enterTransition.select("rect")
.attr("width", function(d) { return x(d.value); })
.style("fill", function(d) { return color(!!d.children); });
// Transition exiting bars to fade out.
var exitTransition = exit.transition()
.duration(duration)
.style("opacity", 1e-6)
.remove();
// Transition exiting bars to the new x-scale.
exitTransition.selectAll("rect")
.attr("width", function(d) { return x(d.value); });
// Rebind the current node to the background.
svg.select(".background")
.datum(d)
.transition()
.duration(end);
d.index = i;
}
function up(d) {
if (!d.parent || this.__transition__) return;
var end = duration + d.children.length * delay;
// Mark any currently-displayed bars as exiting.
var exit = svg.selectAll(".enter")
.attr("class", "exit");
// Enter the new bars for the clicked-on data's parent.
var enter = bar(d.parent)
.attr("transform", function(d, i) { return "translate(0," + barHeight * i * 1.2 + ")"; })
.style("opacity", 1e-6);
// Color the bars as appropriate.
// Exiting nodes will obscure the parent bar, so hide it.
enter.select("rect")
.style("fill", function(d) { return color(!!d.children); })
.filter(function(p) { return p === d; })
.style("fill-opacity", 1e-6);
// Update the x-scale domain.
x.domain([0, d3.max(d.parent.children, function(d) { return d.value; })]).nice();
// Update the x-axis.
svg.selectAll(".x.axis").transition()
.duration(duration)
.call(xAxis);
// Transition entering bars to fade in over the full duration.
var enterTransition = enter.transition()
.duration(end)
.style("opacity", 1);
// Transition entering rects to the new x-scale.
// When the entering parent rect is done, make it visible!
enterTransition.select("rect")
.attr("width", function(d) { return x(d.value); })
.each("end", function(p) { if (p === d) d3.select(this).style("fill-opacity", null); });
// Transition exiting bars to the parent's position.
var exitTransition = exit.selectAll("g").transition()
.duration(duration)
.delay(function(d, i) { return i * delay; })
.attr("transform", stack(d.index));
// Transition exiting text to fade out.
exitTransition.select("text")
.style("fill-opacity", 1e-6);
// Transition exiting rects to the new scale and fade to parent color.
exitTransition.select("rect")
.attr("width", function(d) { return x(d.value); })
.style("fill", color(true));
// Remove exiting nodes when the last child has finished transitioning.
exit.transition()
.duration(end)
.remove();
// Rebind the current parent to the background.
svg.select(".background")
.datum(d.parent)
.transition()
.duration(end);
}
// Creates a set of bars for the given data node, at the specified index.
function bar(d) {
var bar = svg.insert("g", ".y.axis")
.attr("class", "enter")
.attr("transform", "translate(0,5)")
.selectAll("g")
.data(d.children)
.enter().append("g")
.style("cursor", function(d) { return !d.children ? null : "pointer"; })
.on("click", down);
bar.append("text")
.attr("x", -6)
.attr("y", barHeight / 2)
.attr("dy", ".35em")
.style("text-anchor", "end")
.text(function(d) { return d.name; });
bar.append("rect")
.attr("width", function(d) { return x(d.value); })
.attr("height", barHeight);
return bar;
}
// A stateful closure for stacking bars horizontally.
function stack(i) {
var x0 = 0;
return function(d) {
var tx = "translate(" + x0 + "," + barHeight * i * 1.2 + ")";
x0 += x(d.value);
return tx;
};
}
</script>