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extending-ggplot2.html
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<!DOCTYPE html>
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</head>
<body class="quarto-light">
<div class="reveal">
<div class="slides">
<section class="slide level2">
<h1>
Extending <strong>ggplot2</strong>
</h1>
<h2>
with custom <code>Geom</code>s and <code>Stat</code>s
</h2>
<hr>
<h3>
James Otto
</h3>
<p><img data-src="images/ggplot2.svg" class="absolute" style="top: 270px; left: 670px; width: 300px; "></p>
<div class="footer">
</div>
</section>
<section>
<section id="introduction" class="title-slide slide level1 center">
<h1>Introduction</h1>
<div class="cell">
</div>
</section>
<section id="section" class="slide level2 smaller" data-menu-title="ggplot2 ex 1">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb1"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb1-1"><a href="#cb1-1"></a><span class="fu">ggplot</span>(penguins, <span class="fu">aes</span>(<span class="at">x =</span> bill_length_mm, <span class="at">y =</span> bill_depth_mm)) <span class="sc">+</span></span>
<span id="cb1-2"><a href="#cb1-2"></a> <span class="fu">geom_point</span>()</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-3-1.png" width="960" class="r-stretch"></section>
<section id="section-1" class="slide level2 smaller" data-menu-title="ggplot2 ex 2">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb2"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb2-1"><a href="#cb2-1"></a><span class="fu">ggplot</span>(penguins, <span class="fu">aes</span>(<span class="at">x =</span> bill_length_mm, <span class="at">y =</span> bill_depth_mm, <span class="at">color =</span> species)) <span class="sc">+</span></span>
<span id="cb2-2"><a href="#cb2-2"></a> <span class="fu">geom_point</span>()</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-5-1.png" width="960" class="r-stretch"></section>
<section id="section-2" class="slide level2 smaller" data-menu-title="ggplot2 extension ex (ggdensity)">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb3"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb3-1"><a href="#cb3-1"></a><span class="fu">ggplot</span>(penguins, <span class="fu">aes</span>(<span class="at">x =</span> bill_length_mm, <span class="at">y =</span> bill_depth_mm, <span class="at">fill =</span> species)) <span class="sc">+</span></span>
<span id="cb3-2"><a href="#cb3-2"></a> ggdensity<span class="sc">::</span><span class="fu">geom_hdr</span>()</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-7-1.png" width="960" class="r-stretch"></section>
<section id="section-3" class="slide level2 smaller" data-menu-title="ggplot2 extension ex (ggbeeswarm)">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb4"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb4-1"><a href="#cb4-1"></a><span class="fu">ggplot</span>(penguins, <span class="fu">aes</span>(<span class="at">x =</span> bill_length_mm, <span class="at">y =</span> species)) <span class="sc">+</span></span>
<span id="cb4-2"><a href="#cb4-2"></a> ggbeeswarm<span class="sc">::</span><span class="fu">geom_quasirandom</span>()</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-9-1.png" width="960" class="r-stretch"></section>
<section id="section-4" class="slide level2 smaller" data-menu-title="ggplot2 extension ex (ggridges)">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb5"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb5-1"><a href="#cb5-1"></a><span class="fu">ggplot</span>(penguins, <span class="fu">aes</span>(<span class="at">x =</span> bill_length_mm, <span class="at">y =</span> species, <span class="at">fill =</span> <span class="fu">after_stat</span>(x))) <span class="sc">+</span></span>
<span id="cb5-2"><a href="#cb5-2"></a> ggridges<span class="sc">::</span><span class="fu">geom_density_ridges_gradient</span>()</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<!-- --- -->
<!-- ```{r} -->
<!-- penguins |> -->
<!-- drop_na() |> -->
<!-- group_by(species) |> -->
<!-- summarize(mean = mean(bill_length_mm), sd = sd(bill_length_mm)) |> -->
<!-- ggplot(aes(y = species, xdist = distributional::dist_normal(mean, sd))) + -->
<!-- ggdist::stat_halfeye() -->
<!-- ``` -->
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-11-1.png" width="960" class="r-stretch"></section></section>
<section>
<section id="a-first-look-at-ggproto-objects" class="title-slide slide level1 center">
<h1>A first look at <strong>ggproto</strong> objects</h1>
</section>
<section id="section-5" class="slide level2" data-menu-title="GeomPoint 1" data-auto-animate="true">
<h2 data-id="quarto-animate-title"></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb6"><pre class="sourceCode numberSource r number-lines code-with-copy" data-id="quarto-animate-code"><code class="sourceCode r hljs"><span id="cb6-1" class="hljs-ln-code"><a href="#cb6-1"></a>df <span class="ot"><-</span> <span class="fu">data.frame</span>(</span>
<span id="cb6-2" class="hljs-ln-code"><a href="#cb6-2"></a> <span class="at">x =</span> <span class="fu">rnorm</span>(<span class="dv">10</span>),</span>
<span id="cb6-3" class="hljs-ln-code"><a href="#cb6-3"></a> <span class="at">y =</span> <span class="fu">rnorm</span>(<span class="dv">10</span>)</span>
<span id="cb6-4" class="hljs-ln-code"><a href="#cb6-4"></a>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-6" class="slide level2" data-menu-title="GeomPoint 2" data-auto-animate="true">
<h2 data-id="quarto-animate-title"></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb7"><pre class="sourceCode numberSource r number-lines code-with-copy" data-id="quarto-animate-code"><code class="sourceCode r hljs"><span id="cb7-1" class="hljs-ln-code"><a href="#cb7-1"></a>df <span class="ot"><-</span> <span class="fu">data.frame</span>(</span>
<span id="cb7-2" class="hljs-ln-code"><a href="#cb7-2"></a> <span class="at">x =</span> <span class="fu">rnorm</span>(<span class="dv">10</span>),</span>
<span id="cb7-3" class="hljs-ln-code"><a href="#cb7-3"></a> <span class="at">y =</span> <span class="fu">rnorm</span>(<span class="dv">10</span>)</span>
<span id="cb7-4" class="hljs-ln-code"><a href="#cb7-4"></a>)</span>
<span id="cb7-5" class="hljs-ln-code"><a href="#cb7-5"></a></span>
<span id="cb7-6" class="hljs-ln-code"><a href="#cb7-6"></a>df</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output-display">
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<script data-pagedtable-source="" type="application/json">
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</div>
</section>
<section id="section-7" class="slide level2" data-menu-title="GeomPoint 3">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb8"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb8-1"><a href="#cb8-1"></a><span class="fu">ggplot</span>(df, <span class="fu">aes</span>(x, y)) <span class="sc">+</span></span>
<span id="cb8-2"><a href="#cb8-2"></a> <span class="fu">geom_point</span>()</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-15-1.png" width="960" class="r-stretch"></section>
<section id="section-8" class="slide level2" data-menu-title="GeomPoint 4">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb9" data-code-line-numbers="false"><pre class="sourceCode r code-with-copy"><code class="sourceCode r"><span id="cb9-1"><a href="#cb9-1" aria-hidden="true" tabindex="-1"></a>geom_point</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<div class="sourceCode" id="cb10"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb10-1"><a href="#cb10-1"></a><span class="cf">function</span> (<span class="at">mapping =</span> <span class="cn">NULL</span>, <span class="at">data =</span> <span class="cn">NULL</span>, <span class="at">stat =</span> <span class="st">"identity"</span>, <span class="at">position =</span> <span class="st">"identity"</span>, </span>
<span id="cb10-2"><a href="#cb10-2"></a> ..., <span class="at">na.rm =</span> <span class="cn">FALSE</span>, <span class="at">show.legend =</span> <span class="cn">NA</span>, <span class="at">inherit.aes =</span> <span class="cn">TRUE</span>) </span>
<span id="cb10-3"><a href="#cb10-3"></a>{</span>
<span id="cb10-4"><a href="#cb10-4"></a> <span class="fu">layer</span>(<span class="at">data =</span> data, <span class="at">mapping =</span> mapping, <span class="at">stat =</span> stat, <span class="at">geom =</span> GeomPoint, </span>
<span id="cb10-5"><a href="#cb10-5"></a> <span class="at">position =</span> position, <span class="at">show.legend =</span> show.legend, <span class="at">inherit.aes =</span> inherit.aes, </span>
<span id="cb10-6"><a href="#cb10-6"></a> <span class="at">params =</span> <span class="fu">list2</span>(<span class="at">na.rm =</span> na.rm, ...))</span>
<span id="cb10-7"><a href="#cb10-7"></a>}</span>
<span id="cb10-8"><a href="#cb10-8"></a><span class="sc"><</span>bytecode<span class="sc">:</span> <span class="dv">0x559a5e930678</span><span class="sc">></span></span>
<span id="cb10-9"><a href="#cb10-9"></a><span class="er"><</span>environment<span class="sc">:</span> namespace<span class="sc">:</span>ggplot2<span class="sc">></span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</div>
</section>
<section id="section-9" class="slide level2" data-menu-title="GeomPoint 5">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb11"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb11-1"><a href="#cb11-1"></a><span class="fu">ggplot</span>(df, <span class="fu">aes</span>(x, y)) <span class="sc">+</span></span>
<span id="cb11-2"><a href="#cb11-2"></a> <span class="fu">layer</span>(<span class="at">geom =</span> GeomPoint, <span class="at">stat =</span> StatIdentity, <span class="at">position =</span> <span class="st">"identity"</span>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-17-1.png" width="960" class="r-stretch"></section>
<section id="section-10" class="slide level2" data-menu-title="GeomPoint 6">
<h2></h2>
<ul>
<li><strong>ggplot2</strong> is built on the ggproto object oriented system.</li>
</ul>
<div class="fragment">
<ul>
<li><code>GeomPoint</code> and <code>StatIdentity</code> are each objects* with methods and fields that encode the relevant procedures and defaults to create a scatterplot.</li>
</ul>
</div>
</section>
<section id="section-11" class="slide level2" data-menu-title="GeomPoint 7">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb12" data-code-line-numbers="|4"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb12-1"><a href="#cb12-1"></a>GeomPoint</span>
<span id="cb12-2"><a href="#cb12-2"></a><span class="co">#> <ggproto object: Class GeomPoint, Geom, gg></span></span>
<span id="cb12-3"><a href="#cb12-3"></a><span class="co">#> aesthetics: function</span></span>
<span id="cb12-4"><a href="#cb12-4"></a><span class="co">#> default_aes: uneval</span></span>
<span id="cb12-5"><a href="#cb12-5"></a><span class="co">#> draw_group: function</span></span>
<span id="cb12-6"><a href="#cb12-6"></a><span class="co">#> draw_key: function</span></span>
<span id="cb12-7"><a href="#cb12-7"></a><span class="co">#> draw_layer: function</span></span>
<span id="cb12-8"><a href="#cb12-8"></a><span class="co">#> draw_panel: function</span></span>
<span id="cb12-9"><a href="#cb12-9"></a><span class="co">#> extra_params: na.rm</span></span>
<span id="cb12-10"><a href="#cb12-10"></a><span class="co">#> handle_na: function</span></span>
<span id="cb12-11"><a href="#cb12-11"></a><span class="co">#> non_missing_aes: size shape colour</span></span>
<span id="cb12-12"><a href="#cb12-12"></a><span class="co">#> optional_aes: </span></span>
<span id="cb12-13"><a href="#cb12-13"></a><span class="co">#> parameters: function</span></span>
<span id="cb12-14"><a href="#cb12-14"></a><span class="co">#> rename_size: FALSE</span></span>
<span id="cb12-15"><a href="#cb12-15"></a><span class="co">#> required_aes: x y</span></span>
<span id="cb12-16"><a href="#cb12-16"></a><span class="co">#> setup_data: function</span></span>
<span id="cb12-17"><a href="#cb12-17"></a><span class="co">#> setup_params: function</span></span>
<span id="cb12-18"><a href="#cb12-18"></a><span class="co">#> use_defaults: function</span></span>
<span id="cb12-19"><a href="#cb12-19"></a><span class="co">#> super: <ggproto object: Class Geom, gg></span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-12" class="slide level2" data-menu-title="GeomPoint 8">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb13"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb13-1"><a href="#cb13-1"></a>GeomPoint<span class="sc">$</span>default_aes</span>
<span id="cb13-2"><a href="#cb13-2"></a><span class="co">#> Aesthetic mapping: </span></span>
<span id="cb13-3"><a href="#cb13-3"></a><span class="co">#> * `shape` -> 19</span></span>
<span id="cb13-4"><a href="#cb13-4"></a><span class="co">#> * `colour` -> "black"</span></span>
<span id="cb13-5"><a href="#cb13-5"></a><span class="co">#> * `size` -> 1.5</span></span>
<span id="cb13-6"><a href="#cb13-6"></a><span class="co">#> * `fill` -> NA</span></span>
<span id="cb13-7"><a href="#cb13-7"></a><span class="co">#> * `alpha` -> NA</span></span>
<span id="cb13-8"><a href="#cb13-8"></a><span class="co">#> * `stroke` -> 0.5</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-13" class="slide level2" data-menu-title="GeomPoint 9">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb14" data-code-line-numbers="8"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb14-1"><a href="#cb14-1"></a>GeomPoint</span>
<span id="cb14-2"><a href="#cb14-2"></a><span class="co">#> <ggproto object: Class GeomPoint, Geom, gg></span></span>
<span id="cb14-3"><a href="#cb14-3"></a><span class="co">#> aesthetics: function</span></span>
<span id="cb14-4"><a href="#cb14-4"></a><span class="co">#> default_aes: uneval</span></span>
<span id="cb14-5"><a href="#cb14-5"></a><span class="co">#> draw_group: function</span></span>
<span id="cb14-6"><a href="#cb14-6"></a><span class="co">#> draw_key: function</span></span>
<span id="cb14-7"><a href="#cb14-7"></a><span class="co">#> draw_layer: function</span></span>
<span id="cb14-8"><a href="#cb14-8"></a><span class="co">#> draw_panel: function</span></span>
<span id="cb14-9"><a href="#cb14-9"></a><span class="co">#> extra_params: na.rm</span></span>
<span id="cb14-10"><a href="#cb14-10"></a><span class="co">#> handle_na: function</span></span>
<span id="cb14-11"><a href="#cb14-11"></a><span class="co">#> non_missing_aes: size shape colour</span></span>
<span id="cb14-12"><a href="#cb14-12"></a><span class="co">#> optional_aes: </span></span>
<span id="cb14-13"><a href="#cb14-13"></a><span class="co">#> parameters: function</span></span>
<span id="cb14-14"><a href="#cb14-14"></a><span class="co">#> rename_size: FALSE</span></span>
<span id="cb14-15"><a href="#cb14-15"></a><span class="co">#> required_aes: x y</span></span>
<span id="cb14-16"><a href="#cb14-16"></a><span class="co">#> setup_data: function</span></span>
<span id="cb14-17"><a href="#cb14-17"></a><span class="co">#> setup_params: function</span></span>
<span id="cb14-18"><a href="#cb14-18"></a><span class="co">#> use_defaults: function</span></span>
<span id="cb14-19"><a href="#cb14-19"></a><span class="co">#> super: <ggproto object: Class Geom, gg></span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-14" class="slide level2" data-menu-title="GeomPoint 10">
<h2></h2>
<!-- Slightly out of order to get caught up in details on Geoms here: coord$transform() and pointsGrob() -->
<!-- Just point out, mention that we'll look more at these ideas later when we make our own Geom -->
<div class="cell">
<div class="sourceCode cell-code" id="cb15"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb15-1"><a href="#cb15-1"></a>GeomPoint<span class="sc">$</span>draw_panel</span>
<span id="cb15-2"><a href="#cb15-2"></a><span class="co">#> <ggproto method></span></span>
<span id="cb15-3"><a href="#cb15-3"></a><span class="co">#> <Wrapper function></span></span>
<span id="cb15-4"><a href="#cb15-4"></a><span class="co">#> function (...) </span></span>
<span id="cb15-5"><a href="#cb15-5"></a><span class="co">#> draw_panel(..., self = self)</span></span>
<span id="cb15-6"><a href="#cb15-6"></a><span class="co">#> </span></span>
<span id="cb15-7"><a href="#cb15-7"></a><span class="co">#> <Inner function (f)></span></span>
<span id="cb15-8"><a href="#cb15-8"></a><span class="co">#> function (self, data, panel_params, coord, na.rm = FALSE) </span></span>
<span id="cb15-9"><a href="#cb15-9"></a><span class="co">#> {</span></span>
<span id="cb15-10"><a href="#cb15-10"></a><span class="co">#> if (is.character(data$shape)) {</span></span>
<span id="cb15-11"><a href="#cb15-11"></a><span class="co">#> data$shape <- translate_shape_string(data$shape)</span></span>
<span id="cb15-12"><a href="#cb15-12"></a><span class="co">#> }</span></span>
<span id="cb15-13"><a href="#cb15-13"></a><span class="co">#> coords <- coord$transform(data, panel_params)</span></span>
<span id="cb15-14"><a href="#cb15-14"></a><span class="co">#> stroke_size <- coords$stroke</span></span>
<span id="cb15-15"><a href="#cb15-15"></a><span class="co">#> stroke_size[is.na(stroke_size)] <- 0</span></span>
<span id="cb15-16"><a href="#cb15-16"></a><span class="co">#> ggname("geom_point", pointsGrob(coords$x, coords$y, pch = coords$shape, </span></span>
<span id="cb15-17"><a href="#cb15-17"></a><span class="co">#> gp = gpar(col = alpha(coords$colour, coords$alpha), fill = alpha(coords$fill, </span></span>
<span id="cb15-18"><a href="#cb15-18"></a><span class="co">#> coords$alpha), fontsize = coords$size * .pt + stroke_size * </span></span>
<span id="cb15-19"><a href="#cb15-19"></a><span class="co">#> .stroke/2, lwd = coords$stroke * .stroke/2)))</span></span>
<span id="cb15-20"><a href="#cb15-20"></a><span class="co">#> }</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-15" class="slide level2" data-menu-title="GeomPointNew 1">
<h2></h2>
<p>It is simple to extend via inheritance, we can create a <code>GeomPointNew</code> from <code>GeomPoint</code> with a few adjustments to the default aesthetic options:</p>
<div class="fragment">
<!-- Maybe explain what `ggproto()` is? -->
<div class="cell">
<div class="sourceCode cell-code" id="cb16"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb16-1"><a href="#cb16-1"></a>GeomPointNew <span class="ot"><-</span> <span class="fu">ggproto</span>(<span class="st">"GeomPointNew"</span>, GeomPoint,</span>
<span id="cb16-2"><a href="#cb16-2"></a> </span>
<span id="cb16-3"><a href="#cb16-3"></a> <span class="at">default_aes =</span> <span class="fu">aes</span>(</span>
<span id="cb16-4"><a href="#cb16-4"></a> <span class="at">shape =</span> <span class="dv">21</span>,</span>
<span id="cb16-5"><a href="#cb16-5"></a> <span class="at">colour =</span> <span class="st">"black"</span>,</span>
<span id="cb16-6"><a href="#cb16-6"></a> <span class="at">size =</span> <span class="dv">2</span>,</span>
<span id="cb16-7"><a href="#cb16-7"></a> <span class="at">fill =</span> <span class="st">"slateblue"</span>,</span>
<span id="cb16-8"><a href="#cb16-8"></a> <span class="at">alpha =</span> <span class="cn">NA</span>,</span>
<span id="cb16-9"><a href="#cb16-9"></a> <span class="at">stroke =</span> .<span class="dv">5</span></span>
<span id="cb16-10"><a href="#cb16-10"></a> )</span>
<span id="cb16-11"><a href="#cb16-11"></a> </span>
<span id="cb16-12"><a href="#cb16-12"></a>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</div>
</section>
<section id="section-16" class="slide level2" data-menu-title="GeomPointNew 2">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb17" data-code-line-numbers="|4"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb17-1"><a href="#cb17-1"></a>GeomPointNew</span>
<span id="cb17-2"><a href="#cb17-2"></a><span class="co">#> <ggproto object: Class GeomPointNew, GeomPoint, Geom, gg></span></span>
<span id="cb17-3"><a href="#cb17-3"></a><span class="co">#> aesthetics: function</span></span>
<span id="cb17-4"><a href="#cb17-4"></a><span class="co">#> default_aes: uneval</span></span>
<span id="cb17-5"><a href="#cb17-5"></a><span class="co">#> draw_group: function</span></span>
<span id="cb17-6"><a href="#cb17-6"></a><span class="co">#> draw_key: function</span></span>
<span id="cb17-7"><a href="#cb17-7"></a><span class="co">#> draw_layer: function</span></span>
<span id="cb17-8"><a href="#cb17-8"></a><span class="co">#> draw_panel: function</span></span>
<span id="cb17-9"><a href="#cb17-9"></a><span class="co">#> extra_params: na.rm</span></span>
<span id="cb17-10"><a href="#cb17-10"></a><span class="co">#> handle_na: function</span></span>
<span id="cb17-11"><a href="#cb17-11"></a><span class="co">#> non_missing_aes: size shape colour</span></span>
<span id="cb17-12"><a href="#cb17-12"></a><span class="co">#> optional_aes: </span></span>
<span id="cb17-13"><a href="#cb17-13"></a><span class="co">#> parameters: function</span></span>
<span id="cb17-14"><a href="#cb17-14"></a><span class="co">#> rename_size: FALSE</span></span>
<span id="cb17-15"><a href="#cb17-15"></a><span class="co">#> required_aes: x y</span></span>
<span id="cb17-16"><a href="#cb17-16"></a><span class="co">#> setup_data: function</span></span>
<span id="cb17-17"><a href="#cb17-17"></a><span class="co">#> setup_params: function</span></span>
<span id="cb17-18"><a href="#cb17-18"></a><span class="co">#> use_defaults: function</span></span>
<span id="cb17-19"><a href="#cb17-19"></a><span class="co">#> super: <ggproto object: Class GeomPoint, Geom, gg></span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-17" class="slide level2" data-menu-title="GeomPointNew 3">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb18"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb18-1"><a href="#cb18-1"></a>GeomPointNew<span class="sc">$</span>default_aes</span>
<span id="cb18-2"><a href="#cb18-2"></a><span class="co">#> Aesthetic mapping: </span></span>
<span id="cb18-3"><a href="#cb18-3"></a><span class="co">#> * `shape` -> 21</span></span>
<span id="cb18-4"><a href="#cb18-4"></a><span class="co">#> * `colour` -> "black"</span></span>
<span id="cb18-5"><a href="#cb18-5"></a><span class="co">#> * `size` -> 2</span></span>
<span id="cb18-6"><a href="#cb18-6"></a><span class="co">#> * `fill` -> "slateblue"</span></span>
<span id="cb18-7"><a href="#cb18-7"></a><span class="co">#> * `alpha` -> NA</span></span>
<span id="cb18-8"><a href="#cb18-8"></a><span class="co">#> * `stroke` -> 0.5</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-18" class="slide level2" data-menu-title="GeomPointNew 4">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb19" data-code-line-numbers="8"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb19-1"><a href="#cb19-1"></a>GeomPointNew</span>
<span id="cb19-2"><a href="#cb19-2"></a><span class="co">#> <ggproto object: Class GeomPointNew, GeomPoint, Geom, gg></span></span>
<span id="cb19-3"><a href="#cb19-3"></a><span class="co">#> aesthetics: function</span></span>
<span id="cb19-4"><a href="#cb19-4"></a><span class="co">#> default_aes: uneval</span></span>
<span id="cb19-5"><a href="#cb19-5"></a><span class="co">#> draw_group: function</span></span>
<span id="cb19-6"><a href="#cb19-6"></a><span class="co">#> draw_key: function</span></span>
<span id="cb19-7"><a href="#cb19-7"></a><span class="co">#> draw_layer: function</span></span>
<span id="cb19-8"><a href="#cb19-8"></a><span class="co">#> draw_panel: function</span></span>
<span id="cb19-9"><a href="#cb19-9"></a><span class="co">#> extra_params: na.rm</span></span>
<span id="cb19-10"><a href="#cb19-10"></a><span class="co">#> handle_na: function</span></span>
<span id="cb19-11"><a href="#cb19-11"></a><span class="co">#> non_missing_aes: size shape colour</span></span>
<span id="cb19-12"><a href="#cb19-12"></a><span class="co">#> optional_aes: </span></span>
<span id="cb19-13"><a href="#cb19-13"></a><span class="co">#> parameters: function</span></span>
<span id="cb19-14"><a href="#cb19-14"></a><span class="co">#> rename_size: FALSE</span></span>
<span id="cb19-15"><a href="#cb19-15"></a><span class="co">#> required_aes: x y</span></span>
<span id="cb19-16"><a href="#cb19-16"></a><span class="co">#> setup_data: function</span></span>
<span id="cb19-17"><a href="#cb19-17"></a><span class="co">#> setup_params: function</span></span>
<span id="cb19-18"><a href="#cb19-18"></a><span class="co">#> use_defaults: function</span></span>
<span id="cb19-19"><a href="#cb19-19"></a><span class="co">#> super: <ggproto object: Class GeomPoint, Geom, gg></span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-19" class="slide level2" data-menu-title="GeomPointNew 5">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb20"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb20-1"><a href="#cb20-1"></a>GeomPointNew<span class="sc">$</span>draw_panel</span>
<span id="cb20-2"><a href="#cb20-2"></a><span class="co">#> <ggproto method></span></span>
<span id="cb20-3"><a href="#cb20-3"></a><span class="co">#> <Wrapper function></span></span>
<span id="cb20-4"><a href="#cb20-4"></a><span class="co">#> function (...) </span></span>
<span id="cb20-5"><a href="#cb20-5"></a><span class="co">#> draw_panel(..., self = self)</span></span>
<span id="cb20-6"><a href="#cb20-6"></a><span class="co">#> </span></span>
<span id="cb20-7"><a href="#cb20-7"></a><span class="co">#> <Inner function (f)></span></span>
<span id="cb20-8"><a href="#cb20-8"></a><span class="co">#> function (self, data, panel_params, coord, na.rm = FALSE) </span></span>
<span id="cb20-9"><a href="#cb20-9"></a><span class="co">#> {</span></span>
<span id="cb20-10"><a href="#cb20-10"></a><span class="co">#> if (is.character(data$shape)) {</span></span>
<span id="cb20-11"><a href="#cb20-11"></a><span class="co">#> data$shape <- translate_shape_string(data$shape)</span></span>
<span id="cb20-12"><a href="#cb20-12"></a><span class="co">#> }</span></span>
<span id="cb20-13"><a href="#cb20-13"></a><span class="co">#> coords <- coord$transform(data, panel_params)</span></span>
<span id="cb20-14"><a href="#cb20-14"></a><span class="co">#> stroke_size <- coords$stroke</span></span>
<span id="cb20-15"><a href="#cb20-15"></a><span class="co">#> stroke_size[is.na(stroke_size)] <- 0</span></span>
<span id="cb20-16"><a href="#cb20-16"></a><span class="co">#> ggname("geom_point", pointsGrob(coords$x, coords$y, pch = coords$shape, </span></span>
<span id="cb20-17"><a href="#cb20-17"></a><span class="co">#> gp = gpar(col = alpha(coords$colour, coords$alpha), fill = alpha(coords$fill, </span></span>
<span id="cb20-18"><a href="#cb20-18"></a><span class="co">#> coords$alpha), fontsize = coords$size * .pt + stroke_size * </span></span>
<span id="cb20-19"><a href="#cb20-19"></a><span class="co">#> .stroke/2, lwd = coords$stroke * .stroke/2)))</span></span>
<span id="cb20-20"><a href="#cb20-20"></a><span class="co">#> }</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-20" class="slide level2" data-menu-title="GeomPointNew 6">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb21"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb21-1"><a href="#cb21-1"></a><span class="fu">ggplot</span>(df, <span class="fu">aes</span>(x, y)) <span class="sc">+</span></span>
<span id="cb21-2"><a href="#cb21-2"></a> <span class="fu">layer</span>(<span class="at">geom =</span> GeomPointNew, <span class="at">stat =</span> StatIdentity, <span class="at">position =</span> <span class="st">"identity"</span>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-27-1.png" width="960" class="r-stretch"></section>
<section id="section-21" class="slide level2" data-menu-title="GeomPointNew 7">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb22" data-code-line-numbers="|11"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb22-1"><a href="#cb22-1"></a>geom_point_new <span class="ot"><-</span> <span class="cf">function</span>(<span class="at">mapping =</span> <span class="cn">NULL</span>, <span class="at">data =</span> <span class="cn">NULL</span>, </span>
<span id="cb22-2"><a href="#cb22-2"></a> <span class="at">stat =</span> <span class="st">"identity"</span>, <span class="at">position =</span> <span class="st">"identity"</span>, </span>
<span id="cb22-3"><a href="#cb22-3"></a> ...,</span>
<span id="cb22-4"><a href="#cb22-4"></a> <span class="at">na.rm =</span> <span class="cn">FALSE</span>,</span>
<span id="cb22-5"><a href="#cb22-5"></a> <span class="at">show.legend =</span> <span class="cn">NA</span>,</span>
<span id="cb22-6"><a href="#cb22-6"></a> <span class="at">inherit.aes =</span> <span class="cn">TRUE</span>) {</span>
<span id="cb22-7"><a href="#cb22-7"></a> <span class="fu">layer</span>(</span>
<span id="cb22-8"><a href="#cb22-8"></a> <span class="at">data =</span> data,</span>
<span id="cb22-9"><a href="#cb22-9"></a> <span class="at">mapping =</span> mapping,</span>
<span id="cb22-10"><a href="#cb22-10"></a> <span class="at">stat =</span> stat,</span>
<span id="cb22-11"><a href="#cb22-11"></a> <span class="at">geom =</span> GeomPointNew,</span>
<span id="cb22-12"><a href="#cb22-12"></a> <span class="at">position =</span> position,</span>
<span id="cb22-13"><a href="#cb22-13"></a> <span class="at">show.legend =</span> show.legend,</span>
<span id="cb22-14"><a href="#cb22-14"></a> <span class="at">inherit.aes =</span> inherit.aes,</span>
<span id="cb22-15"><a href="#cb22-15"></a> <span class="at">params =</span> <span class="fu">list</span>(</span>
<span id="cb22-16"><a href="#cb22-16"></a> <span class="at">na.rm =</span> na.rm,</span>
<span id="cb22-17"><a href="#cb22-17"></a> ...</span>
<span id="cb22-18"><a href="#cb22-18"></a> )</span>
<span id="cb22-19"><a href="#cb22-19"></a> )</span>
<span id="cb22-20"><a href="#cb22-20"></a>}</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-22" class="slide level2" data-menu-title="GeomPointNew 8">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb23"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb23-1"><a href="#cb23-1"></a><span class="fu">ggplot</span>(df, <span class="fu">aes</span>(x, y)) <span class="sc">+</span></span>
<span id="cb23-2"><a href="#cb23-2"></a> <span class="fu">geom_point_new</span>()</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-29-1.png" width="960" class="r-stretch"></section></section>
<section>
<section id="extending-stats-traveling-salesperson" class="title-slide slide level1 center">
<h1>Extending stats <br> (traveling salesperson)</h1>
</section>
<section id="section-23" class="slide level2" data-menu-title="salesperson intro 1">
<h2></h2>
<!-- Img source: https://getcircuit.com/teams/blog/what-is-the-traveling-salesman-problem -->
<img data-src="images/TSP.png" class="r-stretch quarto-figure-center"></section>
<section id="section-24" class="slide level2" data-menu-title="salesperson intro 2">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb24"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb24-1"><a href="#cb24-1"></a><span class="fu">ggplot</span>(df, <span class="fu">aes</span>(x, y)) <span class="sc">+</span></span>
<span id="cb24-2"><a href="#cb24-2"></a> <span class="fu">geom_point</span>()</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-30-1.png" width="960" class="r-stretch"></section>
<section id="section-25" class="slide level2" data-menu-title="salesperson intro 3" data-auto-animate="true">
<h2 data-id="quarto-animate-title"></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb25"><pre class="sourceCode numberSource r number-lines code-with-copy" data-id="quarto-animate-code"><code class="sourceCode r hljs"><span id="cb25-1" class="hljs-ln-code"><a href="#cb25-1"></a><span class="fu">library</span>(<span class="st">"TSP"</span>)</span>
<span id="cb25-2" class="hljs-ln-code"><a href="#cb25-2"></a></span>
<span id="cb25-3" class="hljs-ln-code"><a href="#cb25-3"></a>dist_mat <span class="ot"><-</span> <span class="fu">dist</span>(df, <span class="at">diag =</span> <span class="cn">TRUE</span>, <span class="at">upper =</span> <span class="cn">TRUE</span>)</span>
<span id="cb25-4" class="hljs-ln-code"><a href="#cb25-4"></a>atsp <span class="ot"><-</span> <span class="fu">as.ATSP</span>(dist_mat)</span>
<span id="cb25-5" class="hljs-ln-code"><a href="#cb25-5"></a>tour <span class="ot"><-</span> <span class="fu">solve_TSP</span>(atsp)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-26" class="slide level2" data-menu-title="salesperson intro 4" data-auto-animate="true">
<h2 data-id="quarto-animate-title"></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb26"><pre class="sourceCode numberSource r number-lines code-with-copy" data-id="quarto-animate-code"><code class="sourceCode r hljs"><span id="cb26-1" class="hljs-ln-code"><a href="#cb26-1"></a><span class="fu">library</span>(<span class="st">"TSP"</span>)</span>
<span id="cb26-2" class="hljs-ln-code"><a href="#cb26-2"></a></span>
<span id="cb26-3" class="hljs-ln-code"><a href="#cb26-3"></a>dist_mat <span class="ot"><-</span> <span class="fu">dist</span>(df, <span class="at">diag =</span> <span class="cn">TRUE</span>, <span class="at">upper =</span> <span class="cn">TRUE</span>)</span>
<span id="cb26-4" class="hljs-ln-code"><a href="#cb26-4"></a>atsp <span class="ot"><-</span> <span class="fu">as.ATSP</span>(dist_mat)</span>
<span id="cb26-5" class="hljs-ln-code"><a href="#cb26-5"></a>tour <span class="ot"><-</span> <span class="fu">solve_TSP</span>(atsp)</span>
<span id="cb26-6" class="hljs-ln-code"><a href="#cb26-6"></a></span>
<span id="cb26-7" class="hljs-ln-code"><a href="#cb26-7"></a>tour</span>
<span id="cb26-8" class="hljs-ln-code"><a href="#cb26-8"></a><span class="co">#> object of class 'TOUR' </span></span>
<span id="cb26-9" class="hljs-ln-code"><a href="#cb26-9"></a><span class="co">#> result of method 'arbitrary_insertion+two_opt' for 10 cities</span></span>
<span id="cb26-10" class="hljs-ln-code"><a href="#cb26-10"></a><span class="co">#> tour length: 10.5101</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-27" class="slide level2" data-menu-title="salesperson intro 5" data-auto-animate="true">
<h2 data-id="quarto-animate-title"></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb27"><pre class="sourceCode numberSource r number-lines code-with-copy" data-id="quarto-animate-code"><code class="sourceCode r hljs"><span id="cb27-1" class="hljs-ln-code"><a href="#cb27-1"></a><span class="fu">library</span>(<span class="st">"TSP"</span>)</span>
<span id="cb27-2" class="hljs-ln-code"><a href="#cb27-2"></a></span>
<span id="cb27-3" class="hljs-ln-code"><a href="#cb27-3"></a>dist_mat <span class="ot"><-</span> <span class="fu">dist</span>(df, <span class="at">diag =</span> <span class="cn">TRUE</span>, <span class="at">upper =</span> <span class="cn">TRUE</span>)</span>
<span id="cb27-4" class="hljs-ln-code"><a href="#cb27-4"></a>atsp <span class="ot"><-</span> <span class="fu">as.ATSP</span>(dist_mat)</span>
<span id="cb27-5" class="hljs-ln-code"><a href="#cb27-5"></a>tour <span class="ot"><-</span> <span class="fu">solve_TSP</span>(atsp)</span>
<span id="cb27-6" class="hljs-ln-code"><a href="#cb27-6"></a></span>
<span id="cb27-7" class="hljs-ln-code"><a href="#cb27-7"></a><span class="fu">str</span>(tour)</span>
<span id="cb27-8" class="hljs-ln-code"><a href="#cb27-8"></a><span class="co">#> 'TOUR' Named int [1:10] 8 5 1 10 6 3 4 7 2 9</span></span>
<span id="cb27-9" class="hljs-ln-code"><a href="#cb27-9"></a><span class="co">#> - attr(*, "method")= chr "arbitrary_insertion+two_opt"</span></span>
<span id="cb27-10" class="hljs-ln-code"><a href="#cb27-10"></a><span class="co">#> - attr(*, "tour_length")= num 10.5</span></span>
<span id="cb27-11" class="hljs-ln-code"><a href="#cb27-11"></a><span class="co">#> - attr(*, "names")= chr [1:10] "8" "5" "1" "10" ...</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-28" class="slide level2" data-menu-title="salesperson intro 6" data-auto-animate="true">
<h2 data-id="quarto-animate-title"></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb28"><pre class="sourceCode numberSource r number-lines code-with-copy" data-id="quarto-animate-code"><code class="sourceCode r hljs"><span id="cb28-1" class="hljs-ln-code"><a href="#cb28-1"></a>df_sorted <span class="ot"><-</span> df[tour,]</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-29" class="slide level2" data-menu-title="salesperson intro 7" data-auto-animate="true">
<h2 data-id="quarto-animate-title"></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb29"><pre class="sourceCode numberSource r number-lines code-with-copy" data-id="quarto-animate-code"><code class="sourceCode r hljs"><span id="cb29-1" class="hljs-ln-code"><a href="#cb29-1"></a>df_sorted <span class="ot"><-</span> df[tour,]</span>
<span id="cb29-2" class="hljs-ln-code"><a href="#cb29-2"></a></span>
<span id="cb29-3" class="hljs-ln-code"><a href="#cb29-3"></a>df_sorted</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output-display">
<div data-pagedtable="false">
<script data-pagedtable-source="" type="application/json">
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</script>
</div>
</div>
</div>
</section>
<section id="section-30" class="slide level2" data-menu-title="salesperson intro 8">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb30"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb30-1"><a href="#cb30-1"></a><span class="fu">ggplot</span>(df_sorted, <span class="fu">aes</span>(x, y)) <span class="sc">+</span></span>
<span id="cb30-2"><a href="#cb30-2"></a> <span class="fu">geom_path</span>() <span class="sc">+</span></span>
<span id="cb30-3"><a href="#cb30-3"></a> <span class="fu">geom_point_new</span>() </span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-36-1.png" width="960" class="r-stretch"></section>
<section id="section-31" class="slide level2" data-menu-title="StatSalesperson 1">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb31"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb31-1"><a href="#cb31-1"></a>StatSalesperson <span class="ot"><-</span> <span class="fu">ggproto</span>(<span class="st">"StatSalesperson"</span>, Stat,</span>
<span id="cb31-2"><a href="#cb31-2"></a> </span>
<span id="cb31-3"><a href="#cb31-3"></a> <span class="at">compute_group =</span> <span class="cf">function</span>(data, scales) {</span>
<span id="cb31-4"><a href="#cb31-4"></a> </span>
<span id="cb31-5"><a href="#cb31-5"></a> dist_mat <span class="ot"><-</span> <span class="fu">dist</span>(data[,<span class="fu">c</span>(<span class="st">"x"</span>, <span class="st">"y"</span>)], <span class="at">diag =</span> <span class="cn">TRUE</span>, <span class="at">upper =</span> <span class="cn">TRUE</span>)</span>
<span id="cb31-6"><a href="#cb31-6"></a> atsp <span class="ot"><-</span> <span class="fu">as.ATSP</span>(dist_mat)</span>
<span id="cb31-7"><a href="#cb31-7"></a> tour <span class="ot"><-</span> <span class="fu">solve_TSP</span>(atsp)</span>
<span id="cb31-8"><a href="#cb31-8"></a> </span>
<span id="cb31-9"><a href="#cb31-9"></a> data[tour,]</span>
<span id="cb31-10"><a href="#cb31-10"></a> </span>
<span id="cb31-11"><a href="#cb31-11"></a> },</span>
<span id="cb31-12"><a href="#cb31-12"></a> </span>
<span id="cb31-13"><a href="#cb31-13"></a> <span class="at">required_aes =</span> <span class="fu">c</span>(<span class="st">"x"</span>, <span class="st">"y"</span>) </span>
<span id="cb31-14"><a href="#cb31-14"></a>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-32" class="slide level2" data-menu-title="StatSalesperson 2">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb32"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb32-1"><a href="#cb32-1"></a>stat_salesperson <span class="ot"><-</span> <span class="cf">function</span>(<span class="at">mapping =</span> <span class="cn">NULL</span>, <span class="at">data =</span> <span class="cn">NULL</span>, </span>
<span id="cb32-2"><a href="#cb32-2"></a> <span class="at">geom =</span> GeomPath, <span class="at">position =</span> <span class="st">"identity"</span>,</span>
<span id="cb32-3"><a href="#cb32-3"></a> ...,</span>
<span id="cb32-4"><a href="#cb32-4"></a> <span class="at">na.rm =</span> <span class="cn">FALSE</span>, </span>
<span id="cb32-5"><a href="#cb32-5"></a> <span class="at">show.legend =</span> <span class="cn">NA</span>, </span>
<span id="cb32-6"><a href="#cb32-6"></a> <span class="at">inherit.aes =</span> <span class="cn">TRUE</span>) {</span>
<span id="cb32-7"><a href="#cb32-7"></a> <span class="fu">layer</span>(</span>
<span id="cb32-8"><a href="#cb32-8"></a> <span class="at">stat =</span> StatSalesperson, <span class="at">data =</span> data, <span class="at">mapping =</span> mapping, <span class="at">geom =</span> geom, </span>
<span id="cb32-9"><a href="#cb32-9"></a> <span class="at">position =</span> position, <span class="at">show.legend =</span> show.legend, <span class="at">inherit.aes =</span> inherit.aes,</span>
<span id="cb32-10"><a href="#cb32-10"></a> <span class="at">params =</span> <span class="fu">list</span>(<span class="at">na.rm =</span> na.rm, ...)</span>
<span id="cb32-11"><a href="#cb32-11"></a> )</span>
<span id="cb32-12"><a href="#cb32-12"></a>}</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-33" class="slide level2" data-menu-title="StatSalesperson 3">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb33"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb33-1"><a href="#cb33-1"></a><span class="fu">ggplot</span>(df, <span class="fu">aes</span>(x, y)) <span class="sc">+</span></span>
<span id="cb33-2"><a href="#cb33-2"></a> <span class="fu">stat_salesperson</span>() <span class="sc">+</span></span>
<span id="cb33-3"><a href="#cb33-3"></a> <span class="fu">geom_point_new</span>() </span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-39-1.png" width="960" class="r-stretch"></section>
<section id="section-34" class="slide level2" data-menu-title="StatSalesperson 4">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb34"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb34-1"><a href="#cb34-1"></a>StatSalesperson <span class="ot"><-</span> <span class="fu">ggproto</span>(<span class="st">"StatSalesperson"</span>, Stat,</span>
<span id="cb34-2"><a href="#cb34-2"></a> </span>
<span id="cb34-3"><a href="#cb34-3"></a> <span class="at">compute_group =</span> <span class="cf">function</span>(data, scales, <span class="at">method =</span> <span class="st">"nearest_insertion"</span>) {</span>
<span id="cb34-4"><a href="#cb34-4"></a> </span>
<span id="cb34-5"><a href="#cb34-5"></a> dist_mat <span class="ot"><-</span> <span class="fu">dist</span>(data[,<span class="fu">c</span>(<span class="st">"x"</span>, <span class="st">"y"</span>)], <span class="at">diag =</span> <span class="cn">TRUE</span>, <span class="at">upper =</span> <span class="cn">TRUE</span>)</span>
<span id="cb34-6"><a href="#cb34-6"></a> atsp <span class="ot"><-</span> <span class="fu">as.ATSP</span>(dist_mat)</span>
<span id="cb34-7"><a href="#cb34-7"></a> tour <span class="ot"><-</span> <span class="fu">solve_TSP</span>(atsp, method)</span>
<span id="cb34-8"><a href="#cb34-8"></a> </span>
<span id="cb34-9"><a href="#cb34-9"></a> data[tour,]</span>
<span id="cb34-10"><a href="#cb34-10"></a> </span>
<span id="cb34-11"><a href="#cb34-11"></a> },</span>
<span id="cb34-12"><a href="#cb34-12"></a> </span>
<span id="cb34-13"><a href="#cb34-13"></a> <span class="at">required_aes =</span> <span class="fu">c</span>(<span class="st">"x"</span>, <span class="st">"y"</span>) </span>
<span id="cb34-14"><a href="#cb34-14"></a>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-35" class="slide level2" data-menu-title="StatSalesperson 5">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb35" data-code-line-numbers="|4,17"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb35-1"><a href="#cb35-1"></a>stat_salesperson <span class="ot"><-</span> <span class="cf">function</span>(<span class="at">mapping =</span> <span class="cn">NULL</span>, <span class="at">data =</span> <span class="cn">NULL</span>, </span>
<span id="cb35-2"><a href="#cb35-2"></a> <span class="at">geom =</span> GeomPath, <span class="at">position =</span> <span class="st">"identity"</span>,</span>
<span id="cb35-3"><a href="#cb35-3"></a> ...,</span>
<span id="cb35-4"><a href="#cb35-4"></a> <span class="at">method =</span> <span class="st">"nearest_insertion"</span>,</span>
<span id="cb35-5"><a href="#cb35-5"></a> <span class="at">na.rm =</span> <span class="cn">FALSE</span>, </span>
<span id="cb35-6"><a href="#cb35-6"></a> <span class="at">show.legend =</span> <span class="cn">NA</span>, </span>
<span id="cb35-7"><a href="#cb35-7"></a> <span class="at">inherit.aes =</span> <span class="cn">TRUE</span>) {</span>
<span id="cb35-8"><a href="#cb35-8"></a> <span class="fu">layer</span>(</span>
<span id="cb35-9"><a href="#cb35-9"></a> <span class="at">stat =</span> StatSalesperson, </span>
<span id="cb35-10"><a href="#cb35-10"></a> <span class="at">data =</span> data,</span>
<span id="cb35-11"><a href="#cb35-11"></a> <span class="at">mapping =</span> mapping,</span>
<span id="cb35-12"><a href="#cb35-12"></a> <span class="at">geom =</span> geom,</span>
<span id="cb35-13"><a href="#cb35-13"></a> <span class="at">position =</span> position,</span>
<span id="cb35-14"><a href="#cb35-14"></a> <span class="at">show.legend =</span> show.legend,</span>
<span id="cb35-15"><a href="#cb35-15"></a> <span class="at">inherit.aes =</span> inherit.aes,</span>
<span id="cb35-16"><a href="#cb35-16"></a> <span class="at">params =</span> <span class="fu">list</span>(</span>
<span id="cb35-17"><a href="#cb35-17"></a> <span class="at">method =</span> method,</span>
<span id="cb35-18"><a href="#cb35-18"></a> <span class="at">na.rm =</span> na.rm,</span>
<span id="cb35-19"><a href="#cb35-19"></a> ...</span>
<span id="cb35-20"><a href="#cb35-20"></a> )</span>
<span id="cb35-21"><a href="#cb35-21"></a> )</span>
<span id="cb35-22"><a href="#cb35-22"></a>}</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section>
<section id="section-36" class="slide level2" data-menu-title="StatSalesperson 6">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb36"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb36-1"><a href="#cb36-1"></a><span class="fu">ggplot</span>(df, <span class="fu">aes</span>(x, y)) <span class="sc">+</span></span>
<span id="cb36-2"><a href="#cb36-2"></a> <span class="fu">stat_salesperson</span>(<span class="at">method =</span> <span class="st">"identity"</span>) <span class="sc">+</span></span>
<span id="cb36-3"><a href="#cb36-3"></a> <span class="fu">geom_point_new</span>() </span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-42-1.png" width="960" class="r-stretch"></section>
<section id="section-37" class="slide level2" data-menu-title="StatSalesperson 7">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb37"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb37-1"><a href="#cb37-1"></a><span class="fu">ggplot</span>(df, <span class="fu">aes</span>(x, y)) <span class="sc">+</span></span>
<span id="cb37-2"><a href="#cb37-2"></a> <span class="fu">stat_salesperson</span>(<span class="at">method =</span> <span class="st">"random"</span>) <span class="sc">+</span></span>
<span id="cb37-3"><a href="#cb37-3"></a> <span class="fu">geom_point_new</span>() </span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-43-1.png" width="960" class="r-stretch"></section>
<section id="section-38" class="slide level2" data-menu-title="StatSalesperson 8">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb38"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb38-1"><a href="#cb38-1"></a><span class="fu">ggplot</span>(df, <span class="fu">aes</span>(x, y)) <span class="sc">+</span></span>
<span id="cb38-2"><a href="#cb38-2"></a> <span class="fu">stat_salesperson</span>() <span class="sc">+</span></span>
<span id="cb38-3"><a href="#cb38-3"></a> <span class="fu">geom_point_new</span>() </span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<img data-src="extending-ggplot2_files/figure-revealjs/unnamed-chunk-44-1.png" width="960" class="r-stretch"></section>
<section id="section-39" class="slide level2" data-menu-title="StatSalesperson 9">
<h2></h2>
<div class="cell">
<div class="sourceCode cell-code" id="cb39"><pre class="sourceCode numberSource r number-lines code-with-copy"><code class="sourceCode r"><span id="cb39-1"><a href="#cb39-1"></a>GeomSalesperson <span class="ot"><-</span> <span class="fu">ggproto</span>(<span class="st">"GeomSalesperson"</span>, GeomPath)</span>
<span id="cb39-2"><a href="#cb39-2"></a></span>
<span id="cb39-3"><a href="#cb39-3"></a>geom_salesperson <span class="ot"><-</span> <span class="cf">function</span>(<span class="at">mapping =</span> <span class="cn">NULL</span>, <span class="at">data =</span> <span class="cn">NULL</span>, </span>
<span id="cb39-4"><a href="#cb39-4"></a> <span class="at">stat =</span> StatSalesperson, <span class="at">position =</span> <span class="st">"identity"</span>, </span>
<span id="cb39-5"><a href="#cb39-5"></a> ...,</span>
<span id="cb39-6"><a href="#cb39-6"></a> <span class="at">na.rm =</span> <span class="cn">FALSE</span>,</span>
<span id="cb39-7"><a href="#cb39-7"></a> <span class="at">show.legend =</span> <span class="cn">NA</span>,</span>
<span id="cb39-8"><a href="#cb39-8"></a> <span class="at">inherit.aes =</span> <span class="cn">TRUE</span>) {</span>
<span id="cb39-9"><a href="#cb39-9"></a> <span class="fu">layer</span>(</span>
<span id="cb39-10"><a href="#cb39-10"></a> <span class="at">data =</span> data,</span>
<span id="cb39-11"><a href="#cb39-11"></a> <span class="at">mapping =</span> mapping,</span>
<span id="cb39-12"><a href="#cb39-12"></a> <span class="at">stat =</span> stat,</span>
<span id="cb39-13"><a href="#cb39-13"></a> <span class="at">geom =</span> GeomSalesperson,</span>
<span id="cb39-14"><a href="#cb39-14"></a> <span class="at">position =</span> position,</span>
<span id="cb39-15"><a href="#cb39-15"></a> <span class="at">show.legend =</span> show.legend,</span>
<span id="cb39-16"><a href="#cb39-16"></a> <span class="at">inherit.aes =</span> inherit.aes,</span>