[BioC] odd results from vennCounts()

[Jacqueline Hall]

Hello everyone,
 
I have been getting some stange results from vennCounts() package limma,
without any assocaited warnings.
 
example:
 
try <- matrix(9,nrow=10,ncol=3)
try[10,3] <- 0.2
try[1,2] <- 0.2
m <- classifyTestsF(try)
a <- vennCounts(m)
# vennDiagram(a)
 
If i've understood correctly,it seems that this occurs when one of the
groups is all 1's / all "up".
If you add in try[2,1] <- 0.2 to the above code ie. break the homogeneity of
that "all 1" group, it seems to give sensible results again.
Am i making some kind of mistake to get these odd results or should the
function be printing some kind of warning about a homogenous group, so that
i know not to trust the results?
 
Thanks for your help,
 
Jacqueline 
 

	[[alternative HTML version deleted]]