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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>d3 Tutorial</title>
<meta name="description" content="d3 Tutorial by Interactive Data Lab, University of Washington">
<meta name="author" content="Kanit Wongsuphasawat">
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</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<section>
<h1>
<small>D3.js Tutorial</small>
</h1>
<br/>
<p>
<small>
by <a href="http://hakim.se">Kanit "Ham" Wongsuphasawat</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>
<a href="http://twitter.com/kanitw">@kanitw</a>
/
<a href="http://kanitw.yellowpigz.com">kanitw.yellowpigz.com</a>
</small>
</p>
<p><small><small>(Based on <a href="http://vadim.ogievetsky.com/IntroD3">Vadim Ogievetsky</a> and <a href="alignedleft.com/tutorials/d3/">Scott Murray</a>'s work)</small></small></p>
</section>
<section data-markdown>
## Outline
* Examples
* Selections & Data
* Transitions
* Nested Selections
* Interactions
* Scales & Axes
* Tips e.g. Importing Data
* Layouts & Maps
* More Examples
</section>
<section>
<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>
<h2>Data-Driven Documents</h2>
<ul>
<li>Visualizing Data with Web Standards (HTML/SVG)</li>
<li>Data ↦ Elements – constructing a DOM from Data</li>
<li>In visualization, each data point has a corresponding element (graphical marks). D# helps you maintain this mapping!</li>
</ul>
</section>
<section>
<section>
<h2>Selection</h2>
</section>
<section>
<h3><code>.select() + .append()</code></h3>
<p>d3 use <a href="https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_started/Selectors">CSS Selector</a></p>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="dLofq" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/dLofq'>dLofq</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="dLofq" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/dLofq'>dLofq</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<p>Note: <code>.append()</code> return a new selection–containing the appended object(s) </p>
<footer class="source"><small><small>Source: http://alignedleft.com/tutorials/d3/chaining-methods</small></small></footer>
</section>
<section>
<h3><code>.select()</code> + <code>.attr()</code>, <code>.style()</code></h3>
<p>Select and modify elements's properties</p>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="kfwdp" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/kfwdp'>kfwdp</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="kfwdp" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/kfwdp'>kfwdp</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<p><small>Note: notice chained syntax, object as argument</small></p>
<footer class="source"><small><small>Source: http://vadim.ogievetsky.com/IntroD3/</small></small></footer>
</section>
<section>
<h3>but <code>.select()</code> only selects one item!</h3>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="rLcBg" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/rLcBg'>rLcBg</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="rLcBg" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/rLcBg'>rLcBg</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<footer class="source"><small><small>Source: http://vadim.ogievetsky.com/IntroD3/#12</small></small></footer>
</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="400" data-theme-id="0" data-slug-hash="Iruyi" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/Iruyi'>Iruyi</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="Iruyi" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/Iruyi'>Iruyi</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</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="left">
<p data-height="400" data-theme-id="0" data-slug-hash="pLAvt" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/pLAvt'>pLAvt</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="pLAvt" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/pLAvt'>pLAvt</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<footer class="source">
<p><small class="block">See in console that the selected rect selection object is an array of array that embed data in <code>__data__</code> property!</small></p>
<small><small>Modified from: http://vadim.ogievetsky.com/IntroD3/#14</small></small></footer>
</section>
<section>
<h3>Selection Object</h3>
<ul>
<li>An array of arrays</li>
<li>More precisely, subclass of array</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="400" data-theme-id="0" data-slug-hash="pLAvt" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/pLAvt'>pLAvt</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="pLAvt" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/pLAvt'>pLAvt</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</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="350" data-theme-id="0" data-slug-hash="nFwLt" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/nFwLt'>nFwLt</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="350" data-theme-id="0" data-slug-hash="nFwLt" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/nFwLt'>nFwLt</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
</section>
<section>
<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>
<p>Calling <code>.data()</code> create three arrays – <code>enter</code>, <code>update</code>, <code>exit</code>. <code>.data()</code> returns the update.</p>
<br/><br/>
<p class="see-also">
<small>Source: http://bost.ocks.org/mike/join/</small>
</p>
</section>
<section>
<h3><code>.enter()</code></h3>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="Fawcj" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/Fawcj'>Fawcj</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</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'>See the Pen <a href='http://codepen.io/kanitw/pen/Fawcj'>Fawcj</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<footer class="source"><small><small>Source: http://vadim.ogievetsky.com/IntroD3/#20</small></small></footer>
</section>
<section>
<h3><code>.enter()</code></h3>
<p>Shorter: append, then update all together!</p>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="kvCjf" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/kvCjf'>kvCjf</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</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'>See the Pen <a href='http://codepen.io/kanitw/pen/kvCjf'>kvCjf</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<footer class="source"><small><small>Source: http://vadim.ogievetsky.com/IntroD3/#21</small></small></footer>
</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="400" data-theme-id="0" data-slug-hash="kvCjf" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/kvCjf'>kvCjf</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</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'>See the Pen <a href='http://codepen.io/kanitw/pen/kvCjf'>kvCjf</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<footer class="source"><small><small>Source: http://vadim.ogievetsky.com/IntroD3/#22</small></small></footer>
</section>
<section>
<h3><code>.exit()</code></h3>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="maGjx" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/maGjx'>maGjx</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</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'>See the Pen <a href='http://codepen.io/kanitw/pen/maGjx'>maGjx</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
</section>
</section>
<section>
<section>
<h2>Transitions</h2>
</section>
<section>
<h3><code>.transition()</code></h3>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="tqaDj" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/tqaDj'>tqaDj</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="tqaDj" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/tqaDj'>tqaDj</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</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>
<footer class="source"><small><small>Source: http://vadim.ogievetsky.com/IntroD3/#27</small></small></footer>
</section>
<section>
<h3>Nested <code>.transition()</code> & <code>.delay()</code></h3>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="ouIvC" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/ouIvC'>ouIvC</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="ouIvC" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/ouIvC'>ouIvC</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
</section>
<section>
<h3>Mapping Data to Elements</h3>
<p>The default is index mapping.</p>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="DwyLs" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/DwyLs'>DwyLs</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</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'>See the Pen <a href='http://codepen.io/kanitw/pen/DwyLs'>DwyLs</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</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'>See the Pen <a href='http://codepen.io/kanitw/pen/FHtjf'>FHtjf</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</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'>See the Pen <a href='http://codepen.io/kanitw/pen/FHtjf'>FHtjf</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</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'>See the Pen <a href='http://codepen.io/kanitw/pen/GsKnv'>GsKnv</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</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'>See the Pen <a href='http://codepen.io/kanitw/pen/GsKnv'>GsKnv</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</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>Join key</h3>
<p>Better one..</p>
<p class="see-also">
<small>1</small>
</p>
</section> -->
<!-- <section>
<h3>Some Things Cannot Be Interpolated</h3>
<p>Selection methods related to data joins (data, enter, exit) and creating elements (append, insert) can only be performed on selections</p>
<pre><code class="javascript">
var bar = svg.selectAll(".bar")
.data(data, function(d) { return d.key; });
bar.enter().append("rect")
.attr("class", "bar")
… // initialize entering bars
bar.transition()
… // transition entering + updating bars
bar.exit().transition()
… // transition exiting bars
.remove();
</code></pre>
<p class="see-also">
<small>See also: http://bost.ocks.org/mike/transition/</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="400" data-theme-id="0" data-slug-hash="CuFJz" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/CuFJz'>CuFJz</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="CuFJz" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/CuFJz'>CuFJz</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<footer class="source"><small><small>Source: http://vadim.ogievetsky.com/IntroD3/#33</small></small></footer>
</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 src="http://prcweb.co.uk/lab/selection/" width="100%" height='400'></iframe>
</section>
<section>
More examples
http://bost.ocks.org/mike/miserables/
http://bl.ocks.org/mbostock/3887051
</section>
</section>
<section>
<section>
<h2>Interactions</h2>
</section>
<section>
<h3>Event Listeners</h3>
<p>
<code>.on('mouseover',...), .on('click',...)</code>
</p>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="yziKj" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/yziKj'>yziKj</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="yziKj" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/yziKj'>yziKj</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<p><small>Note 1: <code>:hover</code> pseudo-selector also works with svg!</small></p>
<p><small>Note 2: To remove a <i>listener</i>, pass null as the <i>listener</i>. To remove all listeners for a particular event type, pass null as the <i>listener</i>, and .type as the type, e.g. <code>selection.on(".foo", null)</code>.</small></p>
</section>
<section>
<h3>SVG Tooltips</h3>
<p><a href="http://localhost:8000/fundamental.html#/5/6">Last week</a>, we did it in svg.</p>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="Dbuhd" data-user="kanitw" data-default-tab="html" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/Dbuhd'>Dbuhd</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="Dbuhd" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/Dbuhd'>Dbuhd</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
</section>
<section>
<h3>SVG Tooltips</h3>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="mkgqD" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/mkgqD'>mkgqD</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="mkgqD" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/mkgqD'>mkgqD</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
</section>
<section>
<h3>HTML Tooltips</h3>
<iframe src="http://examples.oreilly.com/0636920026938/chapter_10/14_div_tooltip.html" width="100%" height="400"></iframe>
<p class="see-also">
<small>See "<a href="http://chimera.labs.oreilly.com/books/1230000000345/ch10.html#_html_div_tooltips">Div Tooltip HTML</a>" in Murray</small>
</p>
</section>
<section>
<h3>Brushing - <code>d3.svg.brush()</code></h3>
<iframe src="http://bl.ocks.org/mbostock/raw/4063663/" frameborder="0" width="100%" height="450"></iframe>
<p><small>From http://bl.ocks.org/mbostock/4063663. See also <a href="http://bl.ocks.org/mbostock/1667367">Focus+Context</a></small></p>
</section>
</section>
<section>
<section>
<h2>Scale</h2>
<h4>Domain ↦ Range</h4>
</section>
<section>
<h3><code>.linear()</code></h3>
<p>
<img src="img/d3scale1.png" height="200" width="587" alt="">
</p>
<pre><code class="javascript">
var x = d3.scale.linear().domain([0, 10]).range([0,100]);
console.log(x(-1),x(0), x(4.4), x(10), x(11)); //-10 0 44 100 110 with some rounding errors
console.log(x.clamp()(-1), x.clamp()(11); // 0 100
</code></pre>
<footer class="source"><small><small>Source: http://www.jeromecukier.net/blog/2011/08/11/d3-scales-and-color/</small></small></footer>
</section>
<section >
<h3>Scale methods</h3>
<ul>
<li><code>.nice()</code> round domain to nicer numbers e.g. from <code>[0.2014, 0.9966]</code> to <code>[0.2, 1]</code>
<pre><code class="javascript">
d3.scale.linear().domain([0.2014,0.9966]).nice().domain() // [0.1,1]
</code></pre>
</li>
<li><code>.rangeRound()</code> output range in integers – better for positioning marks on the screen
<pre><code class="javascript">
d3.scale.linear().domain([0, 10]).range([0,100])(0.1234)// 1.234
d3.scale.linear().domain([0, 10]).rangeRound([0,100])(0.1234)// 1
</code></pre></li>
<li><code>.invert()</code>
<pre><code class="javascript">
d3.scale.linear().domain([0, 10]).range([0,100]).invert(50); //5
</code></pre>
</li>
<li><code>.ticks()</code> return uniformly spaced ticks for your axes. (See <a href="https://github.com/mbostock/d3/wiki/SVG-Axes">Axes</a> for examples)</li>
</ul>
</section>
<section>
<h3>Ordinal Scales</h3>
<p><code>d3.scale.ordinal()</code></p>
<p>
<small><code>ordinal.rangePoints(interval[, padding])</code> – e.g. Plots</small>
</p>
<img src="img/range-point.png" height="112" width="476"/>
<p>
<small><code>ordinal.rangeBands(interval[, padding[, outerPadding]])</code> - e.g. Bar Chart</small>
</p>
<img src="img/range-bands.png" height="172" width="540"/>
</section>
<section>
<h3>Categorical Color Scale</h3>
<p>
<code>.category10()</code>
</p>
<p>
<small><font color="#1f77b4">#1f77b4</font>
<font color="#ff7f0e">#ff7f0e</font>
<font color="#2ca02c">#2ca02c</font>
<font color="#d62728">#d62728</font>
<font color="#9467bd">#9467bd</font>
<font color="#8c564b">#8c564b</font>
<font color="#e377c2">#e377c2</font>
<font color="#7f7f7f">#7f7f7f</font>
<font color="#bcbd22">#bcbd22</font>
<font color="#17becf">#17becf</font></small>
</p>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="zpKuv" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/zpKuv'>zpKuv</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="zpKuv" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/zpKuv'>zpKuv</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
</section>
<section>
<p class="see-also">
<small>http://www.jeromecukier.net/blog/2011/08/11/d3-scales-and-color/</small>
</p>
</section>
</section>
<section>
<section data-markdown>
## [SVG Axes](https://github.com/mbostock/d3/wiki/SVG-Axes)
</section>
<section>
<h3></h3>
</section>
<section data-markdown>
## [More SVG Axes](https://github.com/mbostock/d3/wiki/SVG-Axes)
[](http://bl.ocks.org/mbostock/6186172)
[](http://bl.ocks.org/mbostock/5537697)
[](http://bl.ocks.org/mbostock/4573883)
[](http://bl.ocks.org/mbostock/4403522)
[](http://bl.ocks.org/mbostock/4349486)
[](http://bl.ocks.org/mbostock/3892919)
</section>
<section data-markdown>
## [More SVG Axes](https://github.com/mbostock/d3/wiki/SVG-Axes)
[](http://bl.ocks.org/mbostock/3371592)
[](http://bl.ocks.org/mbostock/3259783)
[](http://bl.ocks.org/mbostock/3212294)
[](http://bl.ocks.org/mbostock/2983699)
[](http://bl.ocks.org/mbostock/2996766)
[](http://bl.ocks.org/mbostock/2996785)
[](http://bl.ocks.org/mbostock/1849162)
[](http://bl.ocks.org/mbostock/4323929)
</section>
</section>
<section>
<section>
<h2>Layouts & Maps</h2>
</section>
<section>
<h3>Pie</h3>
<p>Many layouts are just modifier</p>
<div class="left">
<p data-height="400" data-theme-id="0" data-slug-hash="IjqLt" data-user="kanitw" data-default-tab="js" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/IjqLt'>IjqLt</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<div class="right">
<p data-height="400" data-theme-id="0" data-slug-hash="IjqLt" data-user="kanitw" data-default-tab="result" class='codepen'>See the Pen <a href='http://codepen.io/kanitw/pen/IjqLt'>IjqLt</a> by Kanit Wongsuphasawat (<a href='http://codepen.io/kanitw'>@kanitw</a>) on <a href='http://codepen.io'>CodePen</a>
</p>
</div>
<footer class="source"><small><small>Source: <a href="http://chimera.labs.oreilly.com/books/1230000000345/ch11.html">Chapter 11</a> in Interactive Data Visualization for the Web by Murray</small></small></footer>
</section>
<section>
<h3>Force Directed</h3>
....
</section>
<section>
<h3>More Layouts</h3>
<ul>
<li>
<a class="internal present" href="/mbostock/d3/wiki/Bundle-Layout">Bundle</a> - apply Holten's <em>hierarchical bundling algorithm</em> to edges.</li>
<li>
<a class="internal present" href="/mbostock/d3/wiki/Chord-Layout">Chord</a> - produce a chord diagram from a matrix of relationships.</li>
<li>
<a class="internal present" href="/mbostock/d3/wiki/Cluster-Layout">Cluster</a> - cluster entities into a dendrogram.</li>
<li>
<a class="internal present" href="/mbostock/d3/wiki/Force-Layout">Force</a> - position linked nodes using physical simulation.</li>
<li>
<a class="internal present" href="/mbostock/d3/wiki/Hierarchy-Layout">Hierarchy</a> - derive a custom hierarchical layout implementation.</li>
<li>
<a class="internal present" href="/mbostock/d3/wiki/Histogram-Layout">Histogram</a> - compute the distribution of data using quantized bins.</li>
<li>
<a class="internal present" href="/mbostock/d3/wiki/Pack-Layout">Pack</a> - produce a hierarchical layout using recursive circle-packing.</li>
<li>
<a class="internal present" href="/mbostock/d3/wiki/Partition-Layout">Partition</a> - recursively partition a node tree into a sunburst or icicle.</li>
<li>
<a class="internal present" href="/mbostock/d3/wiki/Pie-Layout">Pie</a> - compute the start and end angles for arcs in a pie or donut chart.</li>
<li>
<a class="internal present" href="/mbostock/d3/wiki/Stack-Layout">Stack</a> - compute the baseline for each series in a stacked bar or area chart.</li>
<li>
<a class="internal present" href="/mbostock/d3/wiki/Tree-Layout">Tree</a> - position a tree of nodes tidily.</li>
<li>
<a class="internal present" href="/mbostock/d3/wiki/Treemap-Layout">Treemap</a> - use recursive spatial subdivision to display a tree of nodes.</li>
</ul>
</section>
<section>
<h2>Maps</h2>
</section>
<section>
http://bost.ocks.org/mike/map/
</section>
</section>
<section>
<section>
<h3><code>d3.csv(), d3.tsv()</code></h3>
<p>Implemented Using <a href="http://www.w3.org/TR/XMLHttpRequest/">XMLHttpRequest</a></p>
<pre><code>
var format = d3.time.format("%b %Y");
d3.csv("stocks.csv", function(stocks) {
stocks.forEach(function(d) {
d.price = +d.price;
d.date = format.parse(d.date);
});
//visualization code here...
});
</code></pre>
<p><small>Note: A web server is required when loading external data. Use <code>python -m SimpleHTTPServer 8888</code> is one easy way.</small></p>
<footer class="source"><small><small>Source: http://bost.ocks.org/mike/d3/workshop/#61</small></small></footer>
</section>
<section>
<iframe src="http://bost.ocks.org/mike/d3/workshop/area-chart.html" frameborder="0" width="100%" height="400"></iframe>
</section>
<section>
<h3>importing data</h3>
<p><code>d3.json()</code></p>
<pre><code class="javascript">
var format = d3.time.format("%b %Y");
d3.json("stocks.json", function(stocks) {
stocks.forEach(function(d) {
d.date = format.parse(d.date);
});
//visualization code here...
});
</code></pre>
<footer class="source"><small><small>Source: http://bost.ocks.org/mike/d3/workshop/#65</small></small></footer>
</section>
</section>
<section>
<section>
<h2>Useful Tips</h2>
</section>
<section data-markdown>
### Useful Helpers
* `max()`, `min()`, `range()`, `extent()`, `mean()`, `median()`
* `keys()`, `values()`
* [Arrays](https://github.com/mbostock/d3/wiki/Arrays) – Learn to use Javascript built-in + D3's [Arrays Helpers](https://github.com/mbostock/d3/wiki/Arrays)!
* [SVG Helpers](https://github.com/mbostock/d3/wiki/SVG) e.g. `d3.svg.area()`
</section>
<section>
<section>
<h3>Reusable d3.</h3>
<p>Repeatable, Modifiable, Configurable, Extensible</p>
<ul>
<li>
Mike Bostock's <a href="http://bost.ocks.org/mike/chart/">Towards Reusable Charts</a>
</li>
<li>
Mike Pennisi <a href="http://weblog.bocoup.com/reusability-with-d3/">Exploring Reusability with D3.js
</a>
</li>
</ul>
</section>
</section>
<section>
<section>
<h3>Need in memory database?</h3>
<a href="https://github.com/StanfordHCI/datavore">Datavore</a>
<a href="http://square.github.io/crossfilter/">Crossfilter</a>
</section>
</section>
</section>
<section>
<section>
<h2>More Examples</h2>
</section>
<section>
<h3>Scatter Plots</h3>
<iframe src="http://bl.ocks.org/mbostock/raw/3887118/" width='100%' height="400"></iframe>
<footer class="source"><small>Source: http://bl.ocks.org/mbostock/3887118</small></footer>
</section>
<section>
<h3>Focus + Context Brush</h3>
<iframe src="http://bl.ocks.org/mbostock/raw/1667367/" width='100%' height="400"></iframe>
<footer class="source"><small>Source: http://bl.ocks.org/mbostock/1667367</small></footer>
</section>
<section data-markdown>
### More Examples
* https://github.com/mbostock/d3/wiki/Gallery
* http://mbostock.github.io/d3/talk/20111018/
* http://bost.ocks.org/mike/map/
* http://christopheviau.com/d3list/gallery.html
</section>
</section>
<section>
<h1>Q&A</h1>
<p> Acknowledgement: This tutorial combines contents from Mike Bostock, Vadim Ogievetsky, Scott Murray and Jerome Cukier. </p>
</section>
</div>
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