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d3-02.html
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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">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<link rel="stylesheet" href="reveal.js/css/reveal.css">
<link rel="stylesheet" href="reveal.js/css/theme/black.css" id="theme">
<link rel="stylesheet" href="style.css">
<!-- For syntax highlighting -->
<link rel="stylesheet" href="highlight.js/src/styles/obsidian.css" id="highlight-theme">
<!-- If the query includes 'print-pdf', use the PDF print sheet -->
<script>
document.write('<link rel="stylesheet" href="reveal.js/css/print/' + (window.location.search.match(/print-pdf/gi) ? 'pdf' : 'paper') + '.css" type="text/css" media="print">');
</script>
<script src="js/jquery.js"></script>
<script src="js/d3.js"></script>
<script src="js/chart.js"></script>
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-55386037-1', 'auto');
ga('send', 'pageview');
</script>
<!--[if lt IE 9]>
<script src="reveal.js/lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<div class="slides">
<section class="center">
<h1>
<small>D3.js Tutorial</small>
</h1>
<h4>Second 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
* Interactions
* Scales & Axes
* Tips e.g. Importing Data
* Path Generators & Line Interpolators
* Layouts & Maps
* Let's Build a Chart & More Examples
</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="500" data-theme-id="0" data-slug-hash="yziKj" 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="yziKj" data-user="kanitw" data-default-tab="result" class='codepen'>
</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'>
</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'>
</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'>
</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'>
</p>
</div>
</section>
<section>
<h3>HTML Tooltips</h3>
<iframe src="http://examples.oreilly.com/0636920026938/chapter_10/14_div_tooltip.html" class="white" 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/" class="white" 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 class="center">
<h2>Scale</h2>
<h4>Domain ↦ Range</h4>
<br>
<div class="left-align">
<small>So you don't have to write:</small>
<pre><code class="js" data-trim>
function x(d) {
return d * 42 + "px";
}
</code></pre>
</div>
<p class="see-also">
<small><a href="http://www.jeromecukier.net/blog/2011/08/11/d3-scales-and-color/">http://www.jeromecukier.net/blog/2011/08/11/d3-scales-and-color/</a></small>
</p>
</section>
<section class="center">
<h3><code>.linear()</code></h3>
<p>
<img src="img/d3scale1.png" height="200" width="587" alt="">
</p>
<pre><code class="javascript" data-trim>
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" data-trim>
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" data-trim>
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" data-trim>
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>
<li><code>.clamp()</code> limit output to range if an input outside the domain is provided</li>
</ul>
</section>
<section>
<h3>Scales supports various interpolations!</h3>
<p>Color</p>
<pre><code class="javascript" data-trim>
var x = d3.scale.linear()
.domain([12, 24])
.range(["steelblue", "brown"]);
x(16); // #666586
x.interpolate(d3.interpolateHsl)(16); //#3cb05f
</code></pre>
<p>Size</p>
<pre><code class="javascript" data-trim>
var x = d3.scale.linear()
.domain([12, 24])
.range(["0px", "720px"]);
x(16); // 240px
</code></pre>
</section>
<section>
<h3>Other Scales</h3>
<code>d3.scale.log(), d3.scale.pow(), d3.scale.quantile()</code>
</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'>
</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'>
</p>
</div>
</section>
</section>
<section>
<section>
<h3><a href="https://github.com/mbostock/d3/wiki/SVG-Axes">SVG Axes</a></h3>
<pre><code class="javascript" data-trim>
//Create an axis for a given scale, and configure as desired.
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom"); // returns a function!
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis); //rendering axis with call</code></pre>
<p>Need customization!</p>
<pre><code class="javascript" data-trim>
.axis path, .axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
</code></pre>
<p>See <a href="http://bl.ocks.org/mbostock/3885304">Bar Chart</a> example</p>
</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>Path Generators & Line Interpolators</h2>
Charts from <a href="http://bost.ocks.org/mike/d3/workshop/#124">http://bost.ocks.org/mike/d3/workshop/#124</a>
</section>
<section>
<h3><code>d3.svg.line(), d3.svg.area()</code></h3>
<p>D3 provides <a href="https://github.com/mbostock/d3/wiki/SVG-Shapes">helpers to generate SVG lines and areas</a>.</p>
<div class="leftright">
<div class="left">
<p data-height="500" data-theme-id="0" data-slug-hash="qdWKyx" 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="qdWKyx" data-user="domoritz" data-default-tab="result" class='codepen'>
</p>
</div>
</div>
</section>
<section id="interpolate-linear-chart">
<h3>Linear Interpolation</h3>
<script>d3.select("#interpolate-linear-chart").call(interpolateChart())</script>
</section>
<section id="interpolate-step-chart">
<h3>Step Interpolation</h3>
<small>Step-before and step-after interpolation are handy for bar charts, and for visualizing step functions (values that change instantaneously rather than gradually).</small>
<script>d3.select("#interpolate-step-chart").call(interpolateChart().interpolate("step-after"))</script>
<aside></aside>
</section>
<section id="interpolate-basis-chart">
<h3>Basis Interpolation</h3>
<small>Note that with basis interpolation, the line doesn’t always go through the control point. D3 also provides cardinal and cubic monotone interpolation; the latter is generally preferred to avoid misleading.</small>
<script>d3.select("#interpolate-basis-chart").call(interpolateChart().interpolate("basis"))</script>
</section>
</section>
<section>
<section>
<h2>Layouts & Maps</h2>
</section>
<section>
<h3>Pie</h3>
<p><small>Many layouts are just data generators/modifier.</small></p>
<div class="left">
<p data-height="500" data-theme-id="0" data-slug-hash="xGKzbg" 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="xGKzbg" data-user="domoritz" data-default-tab="result" class='codepen'>
</p>
</div>
<p><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></p>
</section>
<section>
<h3><a href="http://bl.ocks.org/mbostock/4062045">Force Directed</a></h3>
<iframe class="white" src="http://bl.ocks.org/kanitw/8593822" frameborder="0" width="100%" height="500"></iframe>
</section>
<section>
<h3><a href="http://mbostock.github.io/d3/talk/20111018/pack.html">Pack</a></h3>
<img src="img/pack.png" height="480" width="588" alt="">
</section>
<section>
<h3><a href="http://mbostock.github.io/d3/talk/20111018/tree.html">Tree</a></h3>
<img src="img/tree.png" height="480" width="492" alt="">
</section>
<section>
<h3><a href="http://mbostock.github.io/d3/talk/20111018/treemap.html">Treemap</a></h3>
<img src="img/treemap.png" height="480" width="510" alt="">
</section>
<section>
<h3><a href="http://mbostock.github.io/d3/talk/20111018/partition.html">Partition</a></h3>
<img src="img/partition.png" height="343" width="640" alt="">
</section>
<section>
<h3><a href="http://mbostock.github.io/d3/talk/20111116/bundle.html">Bundle</a></h3>
<img src="img/bundle.png" height="480" width="628" alt="">
</section>
<section>
<h3><a href="http://mbostock.github.io/d3/talk/20111116/airports.html">Voronoi</a></h3>
<img src="img/voronoi.png" height="384" width="640" alt="">
</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>
<a href="http://bost.ocks.org/mike/map/">http://bost.ocks.org/mike/map/</a>
</section>
</section>
<section>
<h3>Load data: <code>d3.csv(), d3.tsv(), d3.json()</code></h3>
<p>Implemented Using <a href="http://www.w3.org/TR/XMLHttpRequest/">XMLHttpRequest</a></p>
<pre><code data-trim>
var format = d3.time.format("%b %Y");
d3.csv("stocks.csv", function(d) {
return {
price: +d.price, // convert price to number
date : format.parse(d.date)
};
}, function(error, rows) {
console.log(rows);
});
</code></pre>
<p><small>Note: A web server is required when loading external data. For example with <code>python -m SimpleHTTPServer</code></small></p>
<footer class="source"><small><small>Source: http://bost.ocks.org/mike/d3/workshop/#61</small></small></footer>
</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()`
* Use `window.onresize` event to resize your chart when the window is resized
</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>
<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>Let's Build a Chart!</h2>
</section>
<section>
<h2>Use transforms to define a new origin.</h2>
<p>It's always a good idea to sketch the transforms before you start.</p>
<svg width="1200" height="500" style="zoom: 0.7"><g transform="translate(80,80); scale(0.1)"><defs><marker id="triangle-start" viewBox="0 0 10 10" refX="10" refY="5" markerWidth="-8" markerHeight="8" orient="auto"><path d="M 0 0 L 10 5 L 0 10 z" style="fill: rgb(255, 255, 255);"></path></marker><marker id="triangle-end" viewBox="0 0 10 10" refX="10" refY="5" markerWidth="8" markerHeight="8" orient="auto"><path d="M 0 0 L 10 5 L 0 10 z" style="fill: rgb(255, 255, 255);"></path></marker></defs><rect width="1120" height="480" style="fill: none; stroke: rgb(255, 255, 255); stroke-width: 2px;"></rect><g transform="translate(80,80)"><rect width="960" height="320" style="stroke-dasharray: 8px, 12px; fill: none; stroke: rgb(255, 255, 255); stroke-width: 2px;"></rect><text y="-12" style="fill: rgb(255, 255, 255);">translate(left,top)</text></g><line x2="80" y2="80" marker-end="url(#triangle-end)" style="fill: none; stroke: rgb(255, 255, 255); stroke-width: 2px;"></line><line x1="560" x2="560" y2="80" marker-end="url(#triangle-end)" style="fill: none; stroke: rgb(255, 255, 255); stroke-width: 2px;"></line><line x1="560" x2="560" y1="400" y2="480" marker-start="url(#triangle-start)" style="fill: none; stroke: rgb(255, 255, 255); stroke-width: 2px;"></line><line x1="0" x2="80" y1="280" y2="280" marker-end="url(#triangle-end)" style="fill: none; stroke: rgb(255, 255, 255); stroke-width: 2px;"></line><line x1="1120" x2="1040" y1="280" y2="280" marker-end="url(#triangle-end)" style="fill: none; stroke: rgb(255, 255, 255); stroke-width: 2px;"></line><text y="-12" style="fill: rgb(255, 255, 255);">origin</text><circle r="6" style="fill: rgb(255, 255, 255);"></circle></g></svg>
<small class="">From <a href="http://bost.ocks.org/mike/d3/workshop/#107">http://bost.ocks.org/mike/d3/workshop/#107</a></small>
</section>
<section>
<a href="build_a_chart">Go to the example</a>
</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>
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