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Julia_in_RMarkdown.html
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Julia_in_RMarkdown.html
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<h1>Julia in RMarkdown</h1>
<h4 class="author">Changcheng Li</h4>
<h4 class="date">2019-06-05</h4>
<small class="dont-index">Source: <a href="https://github.com/Non-Contradiction/JuliaCall/blob/master/vignettes/Julia_in_RMarkdown.Rmd"><code>vignettes/Julia_in_RMarkdown.Rmd</code></a></small>
<div class="hidden name"><code>Julia_in_RMarkdown.Rmd</code></div>
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<div id="use-juliacall-as-julia-engine-in-r-markdown" class="section level2">
<h2 class="hasAnchor">
<a href="#use-juliacall-as-julia-engine-in-r-markdown" class="anchor"></a>Use JuliaCall as Julia Engine in R Markdown</h2>
<p>To use <code>JuliaCall</code> package for julia engine in R Markdown document, just set the language of the code chunk to be <code>julia</code>.</p>
<div class="sourceCode" id="cb1"><pre class="sourceCode julia"><code class="sourceCode julia"><a class="sourceLine" id="cb1-1" data-line-number="1"><span class="co">## This is a julia language chunk.</span></a>
<a class="sourceLine" id="cb1-2" data-line-number="2"><span class="co">## In julia, the command without ending semicolon will trigger the display</span></a>
<a class="sourceLine" id="cb1-3" data-line-number="3"><span class="co">## so is JuliaCall package. </span></a>
<a class="sourceLine" id="cb1-4" data-line-number="4"><span class="co">## The julia display will follow immediately after the corresponding command</span></a>
<a class="sourceLine" id="cb1-5" data-line-number="5"><span class="co">## just as the R code in R Markdown.</span></a>
<a class="sourceLine" id="cb1-6" data-line-number="6"></a>
<a class="sourceLine" id="cb1-7" data-line-number="7">a = sqrt(<span class="fl">2</span>);</a>
<a class="sourceLine" id="cb1-8" data-line-number="8">a = sqrt(<span class="fl">2</span>)</a></code></pre></div>
<pre><code>## 1.4142135623730951</code></pre>
<div id="support-for-plots-jl" class="section level3">
<h3 class="hasAnchor">
<a href="#support-for-plots-jl" class="anchor"></a>Support for <code>Plots.jl</code>
</h3>
<p><code>Plots.jl</code> is an easy to use and powerful julia package for plotting, see <a href="https://github.com/JuliaPlots/Plots.jl" class="uri">https://github.com/JuliaPlots/Plots.jl</a> for more detail.</p>
<div class="sourceCode" id="cb3"><pre class="sourceCode julia"><code class="sourceCode julia"><a class="sourceLine" id="cb3-1" data-line-number="1">using Plots</a>
<a class="sourceLine" id="cb3-2" data-line-number="2">gr()</a></code></pre></div>
<pre><code>## Plots.GRBackend()</code></pre>
<div class="sourceCode" id="cb5"><pre class="sourceCode julia"><code class="sourceCode julia"><a class="sourceLine" id="cb5-1" data-line-number="1">plot(Plots.fakedata(<span class="fl">50</span>,<span class="fl">5</span>),w=<span class="fl">3</span>)</a></code></pre></div>
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<div id="get-access-to-julia-in-r-chunk" class="section level2">
<h2 class="hasAnchor">
<a href="#get-access-to-julia-in-r-chunk" class="anchor"></a>Get Access to Julia in R Chunk</h2>
<p>And you can also get access to julia variables in R code chunk quite easily using <code>JuliaCall</code>, for example:</p>
<div class="sourceCode" id="cb6"><pre class="sourceCode r"><code class="sourceCode r"><a class="sourceLine" id="cb6-1" data-line-number="1"><span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/library">library</a></span>(JuliaCall)</a>
<a class="sourceLine" id="cb6-2" data-line-number="2"><span class="co">## This is a R language chunk.</span></a>
<a class="sourceLine" id="cb6-3" data-line-number="3"><span class="co">## In the previous julia chunk, we define variable a, </span></a>
<a class="sourceLine" id="cb6-4" data-line-number="4"><span class="co">## we can use functions in JuliaCall to get access to it.</span></a>
<a class="sourceLine" id="cb6-5" data-line-number="5"><span class="kw"><a href="../reference/julia_eval.html">julia_eval</a></span>(<span class="st">"a"</span>)</a></code></pre></div>
<pre><code>## [1] 1.414214</code></pre>
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<li><a href="#use-juliacall-as-julia-engine-in-r-markdown">Use JuliaCall as Julia Engine in R Markdown</a></li>
<li><a href="#get-access-to-julia-in-r-chunk">Get Access to Julia in R Chunk</a></li>
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