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Treemap of Stack Exchange Sites
Raw
README.md

Stack Exchangeのサイトをさまざまな指標にもとづいたツリーマップで表示します。色分けはサイト一覧上のカテゴリによります。

Raw
index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
margin: auto;
position: relative;
width: 960px;
}
svg {
height: 100%;
width: 100%;
}
form {
position: absolute;
right: 10px;
top: 10px;
}
a {
color: #333;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
a:visited {
color: #333;
}
#loading {
fill: #ccc;
}
.metadata {
color: #666;
font-size: 80%;
text-align: right;
}
.node {
border: solid 1px white;
font: 10px sans-serif;
line-height: 12px;
overflow: hidden;
position: absolute;
text-indent: 2px;
}
</style>
<form>
<label><input type="checkbox" name="trilogy"> 御三家を含める</label>
<label><input type="radio" name="mode" value="questions" checked> 総質問数</label>
<label><input type="radio" name="mode" value="answers"> 総回答数</label>
<label><input type="radio" name="mode" value="posts"> 総投稿数</label>
<label><input type="radio" name="mode" value="percent_answered"> 回答率</label>
<label><input type="radio" name="mode" value="users"> ユーザー数</label>
<label><input type="radio" name="mode" value="questions_per_day"> 質問数/日</label>
<label><input type="radio" name="mode" value="visits_per_day"> 訪問数/日</label>
<label><input type="radio" name="mode" value="age"> 運営日数</label>
<div class="metadata">
<span class="mode"></span> -
<span class="date">&nbsp;</span>
</div>
</form>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/colorbrewer.v1.min.js"></script>
<script>
var margin = {top: 60, right: 10, bottom: 10, left: 10},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var sizeKey = "questions",
includeTrilogy = false;
function getSize(d) {
if (trilogy[d.name] && !includeTrilogy) {
return 0;
}
return d[sizeKey];
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.size([width, height])
.sticky(true)
.value(getSize);
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");
var trilogy = {
"Stack Overflow": true,
"Server Fault": true,
"Super User": true
};
var pinned = "ja-stackoverflow";
var red = d3.rgb(255, 96, 96);
div.append("svg")
.selectAll("#loading")
.data([1])
.enter()
.append("circle")
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.attr("cy", "50%")
.attr("id", "loading");
animateGrowingCircle("#loading", 10, 20)();
d3.json("sesites.json", function(error, sesites) {
div.select("svg").remove();
d3.select(".date").text(new Date(sesites.creation_date));
d3.select(".mode").text(sizeKey);
var categories = {};
var now = (new Date().getTime()) / 1000,
day = 60 * 60 * 24;
sesites.items.forEach(function(each) {
each.posts = each.questions + each.answers;
each.age = Math.ceil((now - each.creation_date) / day);
categories[each.category] = categories[each.category] || [];
categories[each.category].push(each);
});
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for (var category in categories) {
root.children.push({name: category, children: categories[category]});
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.attr("class", "node")
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.style("background", function(d) {
if (pinned === d.slug) {
return red;
}
return d.children ? color(d.name) : null; });
node
.append("a")
.attr("href", function(d) { return d.url; });
node
.each(setTitle);
function redraw() {
d3.select(".mode").text(sizeKey);
node
.data(treemap.value(getSize).nodes)
.transition()
.duration(1500)
.call(position)
.each("end", setTitle);
}
d3.selectAll("input[name=mode]").on("change", function change() {
sizeKey = this.value;
redraw();
});
d3.selectAll("input[name=trilogy]").on("change", function change() {
includeTrilogy = this.checked;
redraw();
});
});
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d3.select(this)
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}
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if (isInt(value)) {
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}
return value.toFixed(2);
}
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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"; });
}
// http://snips.net/blog/posts/2014/01-10-fast-interactive_prototyping_with_d3_js.html
function animateGrowingCircle(selector, fromRadius, toRadius) {
var animateFunction = function () {
var target = d3.select(selector);
if (!target.empty()) {
target
.attr('r', fromRadius)
.transition()
.duration(1000)
.attr('r', toRadius)
.transition()
.duration(1000)
.attr('r', fromRadius)
.each('end', animateFunction);
}
};
return animateFunction;
}
</script>
Raw
scraper.js
function getClassSuffix(item, prefix) {
for (var i = 0; i < item.classList.length; i++) {
if (item.classList[i].indexOf(prefix) == 0) {
return item.classList[i].substring(prefix.length);
}
}
}
function getCategory(item) {
return getClassSuffix(item, 'category-');
}
function getSlug(item) {
return getClassSuffix(item, 'site-');
}
var sesites = $('.lv-item').map(function() {
var $this = $(this);
return {
category: getCategory(this),
slug: getSlug(this),
url: $this.find('.lv-info h2 a').attr('href'),
description: $this.find('.lv-info .lv-description').text(),
name: $this.find('[name=name]').val(),
creation_date: parseInt($this.find('[name=creation-date]').val()),
questions: parseInt($this.find('[name=questions]').val()),
answers: parseInt($this.find('[name=answers]').val()),
percent_answered: parseFloat($this.find('[name=percent-answered]').val()),
users: parseInt($this.find('[name=users]').val()),
visits_per_day: parseFloat($this.find('[name=visits-per-day]').val()),
questions_per_day: parseFloat($this.find('[name=questions-per-day]').val()),
}
}).toArray();
console.log(JSON.stringify({
items: sesites,
creation_date: new Date().getTime()
}));
Raw
sesites.json
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