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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>D3 Tutorial</title>
<meta name="description" content="A framework for easily creating beautiful presentations using HTML">
<meta name="author" content="Hakim El Hattab">
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</head>
<body>
<div class="reveal">
<div class="slides">
<section class="center">
<h1>
<small>D3.js Tutorial</small>
</h1>
<h4>First Part</h4>
<br/>
<p>
<small>
A tutorial by <a href="http://homes.cs.washington.edu/~domoritz/">Dominik Moritz</a> (<a href="http://twitter.com/domoritz">@domoritz</a>) and <a href="http://kanitw.yellowpigz.com/">Kanit "Ham" Wongsuphasawat</a> (<a href="http://twitter.com/kanitw">@kanitw</a>)
</small>
</p>
<p>
<small>
<a href="http://idl.cs.washington.edu">Interactive Data Lab</a>,
<a href="http://uw.edu">University of Washington</a>
</small>
</p>
<p><small><small>(Based on <a href="http://vadim.ogievetsky.com/IntroD3">Vadim Ogievetsky</a> and <a href="http://alignedleft.com/tutorials/d3/">Scott Murray</a>'s work)</small></small></p>
</section>
<section data-markdown>
## Outline
* Examples
* Selections & Data
* Transitions
* Nested Selections
Part 2: Interactions, scales, axes, data, layouts
</section>
<section>
<section>
<h2>Data-Driven Documents (D3)</h2>
</section>
<section>
<h2>What D3 is <span class="red">not</span></h2>
<ul>
<li><span class="red">Not</span> a chart library (but it can make charts)</li>
<li><span class="red">Not</span> a compatibility layer</li>
<li><span class="red">Not</span> (only) about SVG or HTML or Canvas</li>
</ul>
</section>
<section>
<h2>D3 is Data ↦ Elements</h2>
<ul>
<li>Visualizing Data with Web Standards (HTML/SVG)</li>
<li>Data ↦ Elements – constructing the DOM from Data</li>
<li>In visualization, each data point has a corresponding element (graphical marks). D3 helps you maintain this mapping!</li>
</ul>
</section>
<section class="center">
<h3>Show Reels</h3>
<img src="img/d3.png" style="max-width: 600px; max-height: 400px;">
<p>
<a href="http://vis.stanford.edu/jheer/talks/VisWeek2012/#1">See</a>
</p>
</section>
</section>
<section>
<section>
<h2>Selections</h2>
<p>D3 uses <a href="https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_started/Selectors">CSS Selectors</a></p>
<small>Single selector:</small>
<pre><code class="css" data-trim>
#foo // <any id="foo"> </any>
foo // <foo> </foo>
.foo // <any class="foo"> </any>
[foo=bar] // <any foo="bar"> </any>
foo bar // <foo><bar> </foo></bar>
</code></pre>
<br>
<small>Multiple selectors:</small>
<pre><code class="css" data-trim>
foo.bar // <foo class="bar"> </foo>
foo#bar // <foo id="bar"> </foo>
</code></pre>
</section>
<section>
<h3><code>.select()</code></h3>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="GJKxYZ" data-user="domoritz" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="GJKxYZ" data-user="domoritz" data-default-tab="result" class='codepen'>
</p>
</div>
</section>
<section>
<h3><code>.select()</code> + <code>.attr()</code>, <code>.style()</code></h3>
<p>Select and modify element properties</p>
<div class="left">
<p data-height="500" data-theme-id="0" data-slug-hash="LVPdgK" data-user="domoritz" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="LVPdgK" data-user="domoritz" data-default-tab="result" class='codepen'>
</p>
</div>
<p><small>Note: notice chained syntax, object as argument</small></p></footer>
</section>
<section>
<h3>but <code>.select()</code> only selects one item!</h3>
<div class="left">
<p data-height="500" data-theme-id="0" data-slug-hash="RPbMdr" data-user="domoritz" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="RPbMdr" data-user="domoritz" data-default-tab="result" class='codepen'>
</p>
</div>
</section>
<section>
<h3><code>.selectAll()</code></h3>
<!-- <p><code>.attr()</code>'s value can accept <code>function</code> with arguments <code>data, index</code></p> -->
<div class="left">
<p data-height="500" data-theme-id="0" data-slug-hash="XbrEOy" data-user="domoritz" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="XbrEOy" data-user="domoritz" data-default-tab="result" class='codepen'>
</p>
</div>
<p class="see-also">
<small>See also: http://mbostock.github.io/d3/tutorial/circle.html</small>
</p>
</section>
</section>
<section>
<section>
<h2><code>.data()</code></h2>
<h4>Data ↦ Attributes</h4>
</section>
<section>
<h3><code>.data()</code></h3>
<p>Tell D3 that you want the selected elements to correspond to data!</p>
<div class="leftright">
<div class="left">
<p data-height="500" data-theme-id="0" data-slug-hash="bdbvJr" data-user="domoritz" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="bdbvJr" data-user="domoritz" data-default-tab="result" class='codepen'>
</p>
</div>
</div>
<div class="note">
<small>See in console that the selected rect selection object is an array of array that embed data in <code>__data__</code> property!</small>
</div>
</section>
<section>
<h3>Selection Object</h3>
<ul>
<li>An array of arrays</li>
<li>if <code>.data()</code> is called, <code>__data__</code> of each element will contain the data mapped to that element.</li>
</ul>
<img src="img/__data__.png" height="60" width="155" alt="">
<p><small>You should have seen this from last slide!</small></p>
</section>
<section>
<h3><div class="code">.data()</div></h3>
<p>Data can be objects too!</p>
<div class="left">
<p data-height="510" data-theme-id="0" data-slug-hash="jPNzRZ" data-user="domoritz" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="jPNzRZ" data-user="domoritz" data-default-tab="result" class='codepen'>
</p>
</div>
</section>
<section>
<h3><code>.data()</code></h3>
<h4>What if number of data doesn't match number of items selected?</h4>
<div class="left">
<p data-height="510" data-theme-id="0" data-slug-hash="JdPLwq" data-user="domoritz" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="JdPLwq" data-user="domoritz" data-default-tab="result" class='codepen'>
</p>
</div>
</section>
<section class="center">
<h3>Thinking with Join</h3>
<style>
#join-svg circle {
fill: none;
fill-opacity: .6;
stroke: black;
stroke-width: 1.5px;
}
#join-svg text{
font-size: 20px;
fill:white;
}
</style>
<br/><br/>
<svg id="join-svg" width="720" height="240"><g transform="translate(0,128)"><g transform="translate(300)"><circle r="110" style="fill: #318be1;"></circle><text y="-120" dy=".35em" text-anchor="middle" style="font-weight: bold;">Data</text><text x="-50" dy=".35em" text-anchor="middle">Enter</text></g><text x="360" dy=".35em" text-anchor="middle">Update</text><g transform="translate(420)"><circle r="110" style="fill: #FF7A00;"></circle><text y="-120" dy=".35em" text-anchor="middle" style="font-weight: bold;">Elements</text><text x="50" dy=".35em" text-anchor="middle">Exit</text></g></g></svg>
<div style="text-align: left">
<p>Calling <code>.data()</code> creates three arrays:</p>
<ul>
<li><code>enter</code> (Data without corresponding DOM elements)</li>
<li><code>update</code> (DOM elements mapped to data)</li>
<li><code>exit</code> (DOM elements now missing data)</li>
</ul>
</p><code>.data()</code> returns the update.</p>
<br/>
<p class="see-also">
<small><a href="http://bost.ocks.org/mike/join/">http://bost.ocks.org/mike/join/</a></small>
</p>
</div>
</section>
<section>
<h3><code>.enter()</code></h3>
<div class="left">
<p data-height="510" data-theme-id="0" data-slug-hash="Fawcj" data-user="kanitw" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="Fawcj" data-user="kanitw" data-default-tab="result" class='codepen'>
</p>
</div>
</section>
<section>
<h3><code>.enter()</code></h3>
<p>Shorter: append, then update all together!</p>
<div class="left">
<p data-height="500" data-theme-id="0" data-slug-hash="kvCjf" data-user="kanitw" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="kvCjf" data-user="kanitw" data-default-tab="result" class='codepen'>
</p>
</div>
</section>
<section>
<h3><code>.enter()</code> from scratch</h3>
<p>This is a common way that people build visualization in D3!</p>
<div class="left">
<p data-height="500" data-theme-id="0" data-slug-hash="kvCjf" data-user="kanitw" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="kvCjf" data-user="kanitw" data-default-tab="result" class='codepen'>
</p>
</div>
</section>
<section>
<h3><code>.exit()</code></h3>
<div class="left">
<p data-height="500" data-theme-id="0" data-slug-hash="maGjx" data-user="kanitw" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="maGjx" data-user="kanitw" data-default-tab="result" class='codepen'>
</p>
</div>
</section>
</section>
<section>
<section>
<h2>Transitions</h2>
</section>
<section>
<h3><code>.transition()</code></h3>
<div class="left">
<p data-height="500" data-theme-id="0" data-slug-hash="zGOjOb" data-user="domoritz" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="zGOjOb" data-user="domoritz" data-default-tab="result" class='codepen'>
</p>
</div>
<p><small>Note: Transitions in D3 use <i>cubic-in-out</i> as default easing functions. But there are <a href="https://github.com/mbostock/d3/wiki/Transitions#wiki-d3_ease">others</a>.</small></p>
</section>
<section>
<h3>Nested <code>.transition()</code> & <code>.delay()</code></h3>
<div class="left">
<p data-height="500" data-theme-id="0" data-slug-hash="xGKjKo" data-user="domoritz" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="xGKjKo" data-user="domoritz" data-default-tab="result" class='codepen'>
</p>
</div>
</section>
<section>
<h3>Mapping Data to Elements</h3>
<p>The default is index mapping.</p>
<div class="left">
<p data-height="500" data-theme-id="0" data-slug-hash="DwyLs" data-user="kanitw" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="DwyLs" data-user="kanitw" data-default-tab="result" class='codepen'>
</p>
</div>
</section>
<section>
<h3>Join key – <code>.data(...,key)</code></h3>
<p>A key should be a unique string.</p>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="FHtjf" data-user="kanitw" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="FHtjf" data-user="kanitw" data-default-tab="result" class='codepen'>
</p>
</div>
<p class="see-also">
<small>http://bost.ocks.org/mike/selection/#key</small>
</p>
</section>
<section>
<h3>Join key – <code>.data(...,key)</code></h3>
<p>Notice how you can save lines of code with <code>selection.call()</code></p>
<div class="left">
<p data-height="500" data-theme-id="0" data-slug-hash="mJbxGV" data-user="domoritz" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="mJbxGV" data-user="domoritz" data-default-tab="result" class='codepen'>
</p>
</div>
<p class="see-also">
<small>http://bost.ocks.org/mike/selection/#key</small>
</p>
</section>
<section>
<h3>Join key</h3>
<p>New Data?</p>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="GsKnv" data-user="kanitw" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="GsKnv" data-user="kanitw" data-default-tab="result" class='codepen'>
</p>
</div>
<p class="see-also"><small>See even better <a href="http://mbostock.github.io/d3/tutorial/bar-2.html">bars transition</a>.</small></p>
</section>
<section>
<h3>See also</h3>
<ul>
<li>
General Update Pattern <a href="http://bl.ocks.org/mbostock/3808218">I</a>, <a href="http://bl.ocks.org/mbostock/3808221">II</a>, <a href="http://bl.ocks.org/3808234">III</a></h4>
</li>
<li>
<a href="http://mbostock.github.io/d3/tutorial/circle.html">Three Little Circles</a>
</li>
<li><a href="http://bost.ocks.org/mike/transition/">Working with Transitions</a></li>
</ul>
</section>
</section>
<section>
<section>
<h2>Nested Selections</h2>
</section>
<section>
<h3>Nested Selections</h3>
<div class="left">
<p data-height="500" data-theme-id="0" data-slug-hash="PqYeMB" data-user="domoritz" data-default-tab="js" class='codepen'>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="PqYeMB" data-user="domoritz" data-default-tab="result" class='codepen'>
</p>
</div>
</section>
<section>
<h4>See also: <a href="http://bost.ocks.org/mike/selection/">How Selection Works</a></h4>
<iframe src="http://bost.ocks.org/mike/selection/" width="100%" height='450'></iframe>
</section>
<section>
<h3>"<a href="http://prcweb.co.uk/lab/selection/">Two Tables</a>"</h3>
<iframe class="white" src="http://prcweb.co.uk/lab/selection/" width="100%" height='400'></iframe>
</section>
<section data-markdown>
### More examples
* [bl.ocks.org/mbostock/3887051](http://bl.ocks.org/mbostock/3887051)
* [bost.ocks.org/mike/miserables/](http://bost.ocks.org/mike/miserables/)
</section>
</section>
<section>
<h2><a href="d3-02.html">2nd part of D3.js tutorial</a></h2>
</section>
</div>
</div>
<script src="reveal.js/lib/js/head.min.js"></script>
<script src="reveal.js/js/reveal.js"></script>
<script>
// Full list of configuration options available here:
// https://github.com/hakimel/reveal.js#configuration
Reveal.initialize({
controls: true,
progress: true,
history: true,
center: true,
slideNumber: true,
transitionSpeed: 'fast',
theme: Reveal.getQueryHash().theme, // available themes are in /css/theme
transition: Reveal.getQueryHash().transition || 'slide', // default/cube/page/concave/zoom/linear/fade/none
// Parallax scrolling
// parallaxBackgroundImage: 'https://s3.amazonaws.com/hakim-static/reveal-js/reveal-parallax-1.jpg',
// parallaxBackgroundSize: '2100px 900px',
// Optional libraries used to extend on reveal.js
dependencies: [{
src: 'reveal.js/lib/js/classList.js',
condition: function() {
return !document.body.classList;
}
}, {
src: 'reveal.js/plugin/markdown/marked.js',
condition: function() {
return !!document.querySelector('[data-markdown]');
}
}, {
src: 'reveal.js/plugin/markdown/markdown.js',
condition: function() {
return !!document.querySelector('[data-markdown]');
}
}, {
src: 'reveal.js/plugin/highlight/highlight.js',
async: true,
callback: function() {
hljs.initHighlightingOnLoad();
}
}, {
src: 'reveal.js/plugin/zoom-js/zoom.js',
async: true,
condition: function() {
return !!document.body.classList;
}
}, {
src: 'reveal.js/plugin/notes/notes.js',
async: true,
condition: function() {
return !!document.body.classList;
}
}]
});
</script>
<script async src="//codepen.io/assets/embed/ei.js"></script>
<!-- <script src="http://static.jsbin.com/js/embed.js"></script> -->
</body>
</html>