 on these perceptual elements than based on area or color.</p>
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<div id="correcting-for-other-factors" class="section level2 hasAnchor" number="4.4">
<h2><span class="header-section-number">4.4</span> Correcting for other factors<a href="data-visualization.html#correcting-for-other-factors" class="anchor-section" aria-label="Anchor link to header"></a></h2>
<p>Often we are interested in plotting data where the variable of interest is affected by other factors than the one we are interested in. 