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treemap.html
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<!DOCTYPE html>
<meta charset="utf-8">
<title>Treemap for hkust pulse</title>
<style>
body {
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
margin: auto;
position: relative;
width: 960px;
}
form {
position: absolute;
right: 10px;
top: 10px;
}
.node {
border: solid 1px white;
font: 10px sans-serif;
line-height: 12px;
overflow: hidden;
position: absolute;
text-indent: 2px;
}
</style>
<form>
<label><input type="radio" name="mode" value="size" checked> Size</label>
<label><input type="radio" name="mode" value="count"> Count</label>
</form>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>
var margin = {top: 40, right: 10, bottom: 10, left: 10},
width = 1000 - margin.left - margin.right,
height = 700 - margin.top - margin.bottom;
var format = d3.format(",d")
var color = d3.scale.category20c();
//var colorsForDepts = ['#66c2a5','#fc8d62','#8da0cb','#e78ac3','#a6d854','#ffd92f']
var treemap = d3.layout.treemap()
.size([width, height])
.sticky(true)
.value(function(d) { return d.size; });
var div = d3.select("body").append("div")
.style("position", "relative")
.style("width", (width + margin.left + margin.right) + "px")
.style("height", (height + margin.top + margin.bottom) + "px")
.style("left", margin.left + "px")
.style("top", margin.top + "px");
// 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("current.json", function(error, data) {
if (error) throw error;
var allCategories = ["Achievement", "Event", "News", "Seminar", "ThesisDefense"];
//var allDepts = ["CBME","CEE", "CSE", "ECE", "IELM", "MAE"];
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 keywords = getKeywords(data[i], 5, 8);
for (var j = 0; j < keywords.length; j++) {
for (var k = 0; k < allCategories.length; k++) {
if (allCategories[k] == category) {
var index = categoryDict[k].indexOf(keywords[j][0])
var node= {"name": keywords[j][0], "size": keywords[j][1]};
tree.children[k].children.push(node);
categoryDict[k].push(keywords[j][0]);
}
}
}
}
*/
/*
// takes number of articles keyword is found in
for (var i = 0; i < data.length; i++) {
var category = data[i].category;
var indexOfCategory = allCategories.indexOf(category)
var keywords = getKeywords(data[i], 5, 7);
for (var j = 0; j < keywords.length; j++) {
var index = categoryDict[indexOfCategory].indexOf(keywords[j][0]);
var max = keywords[0][1];
if (index == -1) {
var node = {"name": keywords[j][0], "size": 1};
tree.children[indexOfCategory].children.push(node);
categoryDict[indexOfCategory].push(keywords[j][0])
} else {
tree.children[indexOfCategory].children[index].size = tree.children[indexOfCategory].children[index].size + 1;
}
}
}
*/
// filters out keywords that appear in very few articles
for (var i = 0; i < data.length; i++) {
var category = data[i].category;
var indexOfCategory = allCategories.indexOf(category)
var keywords = getKeywords(data[i], 6,5);
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]++;
}
}
}
console.log(categoryDict)
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] > 4) {
var node = {"name": keys[j], "size": categoryDict[i][keyword]};
tree.children[i].children.push(node);
}
}
}
console.log(tree)
console.log(tree)
var node = div.datum(tree).selectAll(".node")
.data(treemap.nodes)
.enter().append("div")
.attr("class", "node")
.call(position)
.style("background", function(d) { return d.children ? color(d.name) : null; })
.text(function(d) { return d.children ? null : d.name; });
/*
d3.selectAll("input").on("change", function change() {
var value = this.value === "count"
? function() { return 1; }
: function(d) { return d.size; };
node
.data(treemap.value(value).nodes)
.transition()
.duration(1500)
.call(position);
});
*/
});
function position() {
this.style("left", function(d) { return d.x + "px"; })
.style("top", function(d) { return d.y + "px"; })
.style("width", function(d) { return Math.max(0, d.dx - 1) + "px"; })
.style("height", function(d) { return Math.max(0, d.dy - 1) + "px"; });
}
</script>