[R] Round error?

Aurora Torrente aurora at ebi.ac.uk
Fri Nov 14 15:22:55 CET 2003

Hi all,

I have tried to compute a p-value for a hypergeometric distribution as:

dhyper(x,k,l,n) + phyper(x,k,l,n,lower.tail=FALSE)

and sometimes obtained negative values.  Do you know if it is because a 
round error or am I doing something wrong?

Thanks in advance,


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