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<!DOCTYPE html>
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<section>
<h1 class="title">ggrepel</h1>
<h2 class="author">Adam M. Wilson</h2>
</section>
<section id="lead-author-kamil-slowikowski" class="slide level2">
<h2>Lead Author: Kamil Slowikowski</h2>
<p><img data-src="slowkow_2018.jpg" /></p>
<ul>
<li>computational biologist
<ul>
<li>analysis of functional genomics data</li>
<li>cell regulation of functions in disease</li>
</ul></li>
<li>software tools for statistical tests and data visualization</li>
<li>Postdoc at Harvard</li>
<li>Last paper in PNAS titled <em>CUX1 and IκBζ (NFKBIZ) mediate the synergistic inflammatory response to TNF and IL-17A in stromal fibroblasts</em></li>
</ul>
</section>
<section id="ggrepel" class="slide level2">
<h2>ggrepel</h2>
<h3 id="geoms-for-ggplot2-to-repel-overlapping-text-labels">geoms for <a href="http://ggplot2.tidyverse.org/">ggplot2</a> to repel overlapping text labels</h3>
<p>Text labels repel away from each other, away from data points, and away from edges of the plotting area.</p>
<p>Two main functions:</p>
<ul>
<li><code>geom_text_repel()</code></li>
<li><code>geom_label_repel()</code></li>
</ul>
</section>
<section id="compare-geom_text-and-geom_text_repel" class="slide level2">
<h2>Compare <code>geom_text()</code> and <code>geom_text_repel()</code></h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode r"><code class="sourceCode r"><a class="sourceLine" id="cb1-1" data-line-number="1">p <-<span class="st"> </span><span class="kw">ggplot</span>(dat, <span class="kw">aes</span>(wt, mpg, <span class="dt">label =</span> car)) <span class="op">+</span></a>
<a class="sourceLine" id="cb1-2" data-line-number="2"><span class="st"> </span><span class="kw">geom_point</span>(<span class="dt">color =</span> <span class="st">"red"</span>)</a>
<a class="sourceLine" id="cb1-3" data-line-number="3"></a>
<a class="sourceLine" id="cb1-4" data-line-number="4">p1 <-<span class="st"> </span>p <span class="op">+</span><span class="st"> </span><span class="kw">geom_text</span>() <span class="op">+</span><span class="st"> </span><span class="kw">labs</span>(<span class="dt">title =</span> <span class="st">"geom_text()"</span>)</a>
<a class="sourceLine" id="cb1-5" data-line-number="5"></a>
<a class="sourceLine" id="cb1-6" data-line-number="6">p2 <-<span class="st"> </span>p <span class="op">+</span><span class="st"> </span><span class="kw">geom_text_repel</span>() <span class="op">+</span><span class="st"> </span><span class="kw">labs</span>(<span class="dt">title =</span> <span class="st">"geom_text_repel()"</span>)</a>
<a class="sourceLine" id="cb1-7" data-line-number="7"></a>
<a class="sourceLine" id="cb1-8" data-line-number="8">gridExtra<span class="op">::</span><span class="kw">grid.arrange</span>(p1, p2, <span class="dt">ncol =</span> <span class="dv">2</span>)</a></code></pre></div>
</section>
<section id="comparison" class="slide level2">
<h2>Comparison</h2>
<p><img data-src="PackagePresentation_files/figure-revealjs/comparison-1.png" /></p>
</section>
<section id="options" class="slide level2">
<h2>Options</h2>
<p>ggrepel provides additional options for <code>geom_text_repel</code> and <code>geom_label_repel</code>:</p>
<table>
<colgroup>
<col style="width: 23%" />
<col style="width: 76%" />
</colgroup>
<thead>
<tr class="header">
<th>Option</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr class="odd">
<td><code>force</code></td>
<td>force of repulsion between overlapping text labels</td>
</tr>
<tr class="even">
<td><code>direction</code></td>
<td>move text labels “both” (default), “x”, or “y” directions</td>
</tr>
<tr class="odd">
<td><code>max.iter</code></td>
<td>maximum number of iterations to try to resolve overlaps</td>
</tr>
<tr class="even">
<td><code>nudge_x</code></td>
<td>adjust the starting x position of the text label</td>
</tr>
<tr class="odd">
<td><code>nudge_y</code></td>
<td>adjust the starting y position of the text label</td>
</tr>
<tr class="even">
<td><code>segment.color</code></td>
<td>line segment color</td>
</tr>
<tr class="odd">
<td><code>segment.size</code></td>
<td>line segment thickness</td>
</tr>
<tr class="even">
<td><code>segment.curvature</code></td>
<td>numeric, negative for left-hand and positive for right-hand curves, 0 for straight lines</td>
</tr>
<tr class="odd">
<td><code>segment.angle</code></td>
<td>0-180, less than 90 skews control points toward the start point</td>
</tr>
<tr class="even">
<td><code>arrow</code></td>
<td>render line segment as an arrow with <code>grid::arrow()</code></td>
</tr>
</tbody>
</table>
</section>
<section id="another-example" class="slide level2">
<h2>Another example</h2>
<p><img data-src="PackagePresentation_files/figure-revealjs/unnamed-chunk-2-1.png" /></p>
</section>
</div>
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68: function() { RevealChalkboard.download() }, // downlad recorded chalkboard drawing when 'd' is pressed
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