As Wenhuo said your numbers as miscalculated. The intersection of groups 1,
2, 3 has 227 elements (n123=227) one element more than the intersection of
2 and 3 (n23 =226) which is impossible.
I hope this helps.

cheers,
Achilleas


On Fri, Nov 9, 2012 at 11:51 AM, wenhuo hu <huwenhuo@gmail.com> wrote:

> Though I can not  what exactly this happened to you. It seems the number
> might be miscalculated according the error message. I used use venn.diagram
> function, this works very elegant.
>
> On Fri, Nov 9, 2012 at 11:22 AM, jay kumar <j.belliekullan@sssup.it>
> wrote:
>
> > Dear Members
> >
> > I am trying to create a venn diagram with four sets using VennDiagram
> 1.5.1
> > package. When I try to plot,it gives me the following error message
> >
> >   Error in draw.quad.venn(area1 = 263, area2 = 311, area3 = 319, area4 =
> > 293,  :
> >   Impossible: partial areas negative.
> >
> > I call the function as mentioned below
> >
> > > venn.plot <- draw.quad.venn( area1 = 263, area2 = 311, area3 = 319,
> area4
> > = 293, n12 = 230, n13 = 216, n14 = 217, n23 = 226, n24 = 214, n34 = 228,
> > n123 = 227, n124 = 213, n134 = 214, n234 = 250, n1234 = 212, category =
> > c("First", "Second", "Third", "Fourth"),fill = c("orange", "red",
> "green",
> > "blue"), lty = "dashed", cex = 2, cat.cex = 2, cat.col = c("orange",
> "red",
> > "green", "blue"));
> > Error in draw.quad.venn(area1 = 263, area2 = 311, area3 = 319, area4 =
> 293,
> >  :
> >   Impossible: partial areas negative
> >
> >
> > > sessionInfo()
> >
> > R version 2.15.2 (2012-10-26)
> > Platform: x86_64-w64-mingw32/x64 (64-bit)
> > attached base packages:
> > [1] grid      stats     graphics  grDevices utils     datasets  methods
> > base
> >
> > other attached packages:
> > [1] VennDiagram_1.5.1
> >
> >
> > I would really appreciate if some one could guide me in sorting this ,as
> I
> > have no clue about my mistake.
> >
> > Looking forward for your reply
> >
> > Jay Belli
> > PhD student
> > Scuola superiore sant Anna Pisa
> > Italy
> >
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> >
> > _______________________________________________
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> > Search the archives:
> > http://news.gmane.org/gmane.science.biology.informatics.conductor
> >
>
>
>
> --
>
>
> Wenhuo Hu
> Park lab
>
> Memorial Sloan Kettering Cancer Center
> Zuckerman Research Building
> 408 East 69th Street
> Room ZRC-527
> New York, NY 10065
> Phone 646-888-3220
> huw@mskcc.org
>
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>
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