Error(s) in re-building vignettes:
--- re-building ‘fully-customed.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
file:////private/var/folders/2b/t0kwbtmn3p7brv2mvx39c9cr0000gn/T/RtmpAVCePR/file164744a0eed00/widget1647419e9c0fc.html screenshot completed
Warning in file.info(x, extra_cols = FALSE) :
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<pre><code class="language-r">library(ggVennDiagram)
</code></pre>
<h2 id="comprehensive-customization-by-using-helper-functions">Comprehensive customization by using helper functions</h2>
<p>The main function <code>ggVennDiagram()</code> accepts a list input, and output a ggplot object.
By measuring the length of input list, it automatically applies internal functions
to build a plot in two steps: data preparation and visualization.</p>
<p>Data preparation was packaged into one function <code>process_data()</code>. Its output
is a S4 <code>VennPlotData</code> class object, which contains three slots, <code>setEdge</code>,
<code>setLabel</code> and <code>region</code>. These slot data then can be further plotted with <code>ggplot</code>
functions.</p>
<p>See below for a better understanding.</p>
<p>Generate example data.</p>
<pre><code class="language-r">genes &lt;- paste0(&quot;gene&quot;,1:1000)
set.seed(20210302)
gene_list &lt;- list(A [... truncated]
--- finished re-building ‘fully-customed.Rmd’

--- re-building ‘using-ggVennDiagram.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.

Quitting from lines 73-81 [unnamed-chunk-4] (using-ggVennDiagram.Rmd)
Error: processing vignette 'using-ggVennDiagram.Rmd' failed with diagnostics:
attempt to apply non-function
--- failed re-building ‘using-ggVennDiagram.Rmd’

--- re-building ‘using-new-shapes.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
Warning in file.info(x, extra_cols = FALSE) :
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<pre><code class="language-r">library(ggVennDiagram)
</code></pre>
<h2 id="internal-shapes">Internal Shapes</h2>
<p>The <strong>ggVennDiagram</strong> package has a set of built-in shapes that are used to plot
Venn diagram. These internal data are stored as sys data as a tibble. It can be
viewed with <code>ggVennDiagram:::shapes</code> and plotted with the function <code>plot_shapes()</code>.</p>
<pre><code class="language-r">ggVennDiagram:::shapes
#&gt; # A tibble: 104 × 6
#&gt;    nsets type    shape_id component id    xy             
#&gt;    &lt;dbl&gt; &lt;chr&gt;   &lt;chr&gt;    &lt;chr&gt;     &lt;chr&gt; &lt;list&gt;         
#&gt;  1     4 ellipse 401f     setEdge   1     &lt;dbl [101 × 2]&gt;
#&gt;  2     4 ellipse 401f     setEdge   2     &lt;dbl [101 × 2]&gt;
#&gt;  3     4 ellipse 401f     setEdge   3     &lt;dbl [101 × 2]&gt;
#&gt;  4     4 ellipse 401f     setEdge   4     &lt;dbl [101 × 2]&gt;
#&gt;  5     4 ellipse 4 [... truncated]
--- finished re-building ‘using-new-shapes.Rmd’

--- re-building ‘venn-plot-with-more-than-four-sets.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.
Warning in file.info(x, extra_cols = FALSE) :
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<pre><code class="language-r">library(ggVennDiagram)
library(ggplot2)
</code></pre>
<h2 id="venn-diagram-for-more-than-four-sets">Venn Diagram for more than four sets</h2>
<p>With <strong>ggVennDiagram</strong> version less than 1.0, it only support 2-4 set Venn.
By importing the polygon from <code>venn</code> , <code>ggVennDiagram</code> now supports 5-7 sets Venn.</p>
<pre><code class="language-r">genes &lt;- paste0(&quot;gene&quot;,1:1000)
set.seed(20210507)
x &lt;- list(A = sample(genes,100),
          B = sample(genes,150),
          C = sample(genes,200),
          D = sample(genes,250),
          E = sample(genes,300),
          F = sample(genes,350),
          G = sample(genes,400))
</code></pre>
<pre><code class="language-r">ggVennDiagram(x, label = &quot;none&quot;, edge_size = 2) + scale_fill_distiller(palette = &quot;RdBu&quot;)
</code></pre>
<p><img src="figure/unnamed-chunk-3-1.png" alt="plot of chunk unnamed-chunk-3" /></p> [... truncated]
--- finished re-building ‘venn-plot-with-more-than-four-sets.Rmd’

SUMMARY: processing the following file failed:
  ‘using-ggVennDiagram.Rmd’

Error: Vignette re-building failed.
Execution halted