title: 4-way Venn Diagram in R?
body: <p>I am trying to make an 4-Way Venn Diagram in R.
  I have this data which I want to put in the diagram:</p>
  
  <p><img src="https://i.stack.imgur.com/YVZhN.jpg" alt="enter image description here">  </p>
  
  <p>Can anyone give me a suggestion how to do it? I try to use the function vennDiagram() but that does not work, because it is a 4way diagram.</p>
  
  <p>I am also trying  to use the package VennDiagram, but is really confusing the way the data is "allocated" to the right place in the diagram. I am using this code:</p>
  
  <pre><code>library (VennDiagram)
  venn.diagram(
      x=list(
      I=c(1:18,19:31,32:119,125:129,130:192,193:144,145:326,327:373),
      VI=c(516:542,510:515,420:497,498:509,145:326,327:373,130:192,193:144),
      II=c(19:31,32:119,145:326,327:373,374:378,378:419,420:497,498:509),
      III=c(506:509,378:419,32:119,125:129,130:192,145:326,420:497,510:515)
      ),
      filename = "4Way_Venn.tiff",
      col = "black",
      lty = "dotted",
      lwd = 4,
      fill = c("cornflowerblue", "green", "yellow", "darkorchid1"),
      alpha = 0.50,
      label.col = c("orange", "white", "darkorchid4", "white", "white", "white", 
                    "white", "white", "darkblue", "white", "white", "white", 
                    "white", "darkgreen", "white"),
      cex = 2.5,
      fontfamily = "serif",
      fontface = "bold",
      cat.col = c("darkblue", "darkgreen", "orange", "darkorchid4"),
      cat.cex = 2.5,
      cat.fontfamily = "serif"
      );
  </code></pre>
  
  <p>Can anyone help me? maybe with an easier solution then the one using the VennDiagram package.</p>