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tempsize
2000 Sep 20
1
SV: sample from contingency table
I have had the same problem and I wrote this function
rmulti <- function(n, size, p)
{
NrDim <- length(p)
if(NrDim<2) stop("The simulated variabel has to be at least
2-dimensional")
res <- matrix(data=NA, nrow=n, ncol=NrDim)
p <- p/sum(p)
TempSize <- size
for(i in 1:NrDim)
{
TempP <- p[i]/sum(p[i:NrDim])
TempBin <- rbinom(n=n, size=TempSize, prob=TempP)
TempSize <- TempSize-TempBin
res[,i] <- TempBin
}
return(res)
}
# Then you can draw 10 samples like this, whith
# each row representing a contingency...