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histogram.html
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<!DOCTYPE html>
<html lang="en">
<head>
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<title>Histogram | the D3 Graph Gallery</title>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="How to build a histogram with Javascript and D3.js: from the most basic example to highly customized examples.">
<meta name="keywords" content="Data,Dataviz,Datavisualization,Javascript,D3,D3.js,histogram">
<meta name="author" content="Yan Holtz">
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<meta property="og:title" content="Histogram | the D3 Graph Gallery">
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<meta property="og:description" content="How to build a density plot with Javascript and D3.js: from the most basic example to highly customized examples.">
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<header class="masthead" style="padding-top: 150px; padding-bottom: 80px">
<div class="textlanding">
<h1>Histogram</h1>
<hr class="short_hr">
<br>
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<br><br>
<p style="max-width: 700px; margin: auto">Welcome in the <a href="https://www.data-to-viz.com/graph/histogram.html">histogram</a> section of the gallery. If you want to know more about this kind of chart, visit <a href="https://www.data-to-viz.com/graph/histogram.html">data-to-viz.com</a>. If you're looking for a simple way to implement it in d3.js, pick an example below.</p>
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<div class="mySeryTitle">Step by step</div>
<hr>
<p>Learn how to build a <a href="graph/histogram_basic.html">basic</a> histogram and how to apply a few customizations to it. Starts easy with only one data series and gets harder with several, <a href="graph/histogram_coloredTail.html">color highlighting</a>, mirroring and more.</p>
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<p>Most basic</p>
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<p class="explanation_portfolio">The most basic histogram you can do in d3.js. Keeping only the core code.</p>
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<img class="img-fluid" src="img/graph/histogram_basic.png" alt="">
</a>
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<p>Color a specific part</p>
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<p class="explanation_portfolio">Use a simple <code>if - else</code> statement to color a part of the histogram.<br><br>Also show how to add a vertical bar annotation.</p>
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<p>Double histogram</p>
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<p class="explanation_portfolio">A double histogram can be handy to compare the distribution of 2 variables.<br><br>Good to see how the <code>filter()</code> function works.</p>
</div>
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<img class="img-fluid" src="img/graph/histogram_double.png" alt="">
</a>
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<div class="mySeryTitle">Interactive</div>
<hr>
<p><u>Interactivity</u> on histograms can be interesting for 2 main reasons. First, playing with the <u>bin size</u> is an important step: the distribution can look very different depending on the value as explained <a href="https://www.data-to-viz.com/caveat/bin_size.html">here</a>. Second, adding a <u>tooltip</u> to display bar threshold and exact number of values can be a plus.
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<p>Button to control bin size</p>
<hr>
<p class="explanation_portfolio">Add a button that controls bin size. Good example to learn how to create an update function that also update an axis.</p>
</div>
</div>
<img class="img-fluid" src="img/graph/histogram_binSize.gif" alt="">
</a>
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<p>Add tooltip</p>
<hr>
<p class="explanation_portfolio">Useful to get the threshold of each bar range. Needs to be improved though.</p>
</div>
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<img class="img-fluid" src="img/graph/histogram_tooltip.png" alt="">
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<div class="captionPortfolio">Density</div>
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<div class="captionPortfolio">Histogram</div>
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