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density2d.html
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density2d.html
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<!DOCTYPE html>
<html lang="en">
<head>
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<title>Density 2d | the D3 Graph Gallery</title>
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<meta name="description" content="How to build 2d density plot 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,2d density">
<meta name="author" content="Yan Holtz">
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<meta property="og:title" content="2d density plot | the D3 Graph Gallery">
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<h1>Density 2d</h1>
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<p style="max-width: 700px; margin: auto">This is the <a href="https://www.data-to-viz.com/graph/density2d.html">density 2d</a> section of the gallery. A 2d density represents the combined distribution of <u>two quantitative variables</u>. If you want to know more about this kind of chart, visit <a href="https://www.data-to-viz.com/graph/density2d.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">main density 2d types</div>
<hr>
<p>A 2d density chart allows to visualize the <u>combined distribution</u> of two quantitative variables. The concept is always the same: one variable is represented on the X axis, the other on the Y axis. Then, the number of observations within a particular area of the 2D space is counted and represented by a color gradient.</p>
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<p>Hexbin chart</p>
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<p class="explanation_portfolio">Group two-dimensional points into hexagonal bins. Possible thanks to the <code>d3-hexbin</code> plugin.</p>
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<p>2d density with shading</p>
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<p class="explanation_portfolio">Very close from the contour plot, but shading is used to make the link between layers.</p>
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<p>2d histogram</p>
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<p class="explanation_portfolio">Group two-dimensional points into rectangular bins. Possible thanks to the <code>d3-rectbin</code> plugin.</p>
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<img class="img-fluid" src="img/graph/density2d_histogram2d.png" alt="">
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<p>Contour plot</p>
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<p class="explanation_portfolio">Representation of contour polygons computed using marching squares</p>
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