title: R: venn.diagram font size equivalent to ggplot2
body: <p>Is there any way to choose same font size in venn_diagram diagram than in ggplot2 charts? In venn_diagram the font size is determined by the percents. Thanks a lot!</p>
  <p>For example, I have venn diagram like this</p>
  <pre><code>set1 &lt;- paste(rep(&quot;word_&quot; , 200) , sample(c(1:1000) , 200 , replace=F) , sep=&quot;&quot;)
  set2 &lt;- paste(rep(&quot;word_&quot; , 200) , sample(c(1:1000) , 200 , replace=F) , sep=&quot;&quot;)
  set3 &lt;- paste(rep(&quot;word_&quot; , 200) , sample(c(1:1000) , 200 , replace=F) , sep=&quot;&quot;)
  
  venn.diagram(
    x = list(set1, set2, set3),
    category.names = c(&quot;Set 1&quot; , &quot;Set 2 &quot; , &quot;Set 3&quot;),
    main = &quot;Figure 1&quot;,
    main.cex = 1.8,
    filename = '#14_venn_diagramm.png',
    output=TRUE
  )
  </code></pre>
  <p>Then I have a ggplot2 chart like that:</p>
  <pre><code>data &lt;- data.frame(
    name=c(&quot;A&quot;,&quot;B&quot;,&quot;C&quot;,&quot;D&quot;,&quot;E&quot;) ,  
    value=c(3,12,5,18,45)
    )
  
  tiff(&quot;test.tiff&quot;, units=&quot;in&quot;, width=9.9, height=3.3, res=600)
  ggplot(data, aes(x=name, y=value)) + 
    geom_bar(stat = &quot;identity&quot;) +
    theme(plot.title = element_text(size = 8)) +
    theme(text = element_text(family = &quot;Times New Roman&quot;)) +
    labs(title = &quot;Figure 2.&quot;, y = NULL, x= NULL, fill = NULL)
  dev.off()
  </code></pre>
  <p>So is there any way to determine, that both titles are in same size (in venn diagram the size is main.cex = 1.8 and in ggplot-chart the size = 8</p>