title: scaling triple Venn diagram in R with VennDiagram package
body: <p>Does anyone know how to get the R package VennDiagram to scale the circles of a Venn diagram containing 3 intersecting sets according to set size?</p>
  
  <p>I can achieve such scaling with the venneular package, but I find this a bit limited in terms of other graphical options compared to VennDiagram.</p>
  
  <p>The VennDiagram package documentation suggests setting the argument 'scaled' to TRUE ought to do the trick, but I find this produces 3 circles of equal size. </p>
  
  <p>The package documentation does cryptically suggest that the scaled argument may only work for certain diagrams:</p>
  
  <pre><code>?draw.triple.venn
  </code></pre>
  
  <p>reveals:</p>
  
  <p>scaled:
  "Boolean indicating whether to scale circle sizes in certain Euler diagrams according to set    sizes or not" </p>
  
  <p>and</p>
  
  <pre><code>?venn.diagram
  
  #Argument Venn Sizes    Class    Description
  #scaled    2, 3         logical  Enable scaling for two-set and certain three-set Euler diagrams.
  </code></pre>
  
  <p>A toy example of my code:</p>
  
  <pre><code>require(VennDiagram)
  
  venn.plot &lt;- draw.triple.venn(
      area1 = 70,
      area2 = 250,
      area3 = 500,
      n12 = 30,
      n23 = 60,
      n13 = 10,
      n123 = 5,
      category = c("C1", "C2", "C3"),
      fill = c("blue", "red", "green"),
      scaled=TRUE)
  
  tiff(filename = "test.tiff", compression = "none",type = "quartz",antialias = "none")
  grid.draw(venn.plot)
  dev.off()
  </code></pre>
  
  <p>Similarly this code using the 'venn.diagram' function doesn't produce the required scaling:</p>
  
  <pre><code>venn.diagram(x=list(A=c(1:15,16:20), B=c(6:15,21:30,100:150), C=c(11:30,200:300)),
           filename="test.tiff",
           fill = c("blue", "yellow", "red"), scaled=TRUE)
  </code></pre>
  
  <p>Thanks v.much</p>
  
  <p>Jim</p>