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 > > > > [[alternative HTML version deleted]] > > > > _______________________________________________ > > Bioconductor mailing list > > Bioconductor@r-project.org > > https://stat.ethz.ch/mailman/listinfo/bioconductor > > 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 > > [[alternative HTML version deleted]] > > _______________________________________________ > Bioconductor mailing list > Bioconductor@r-project.org > https://stat.ethz.ch/mailman/listinfo/bioconductor > Search the archives: > http://news.gmane.org/gmane.science.biology.informatics.conductor > [[alternative HTML version deleted]]