I have another issue.i have a function which calculates the log2(col i
/col2) value, where i stands for columns 3,4,...etc.

data<-read.table("table.txt", header=TRUE)

iratio<-function(x){
for(n in 3:ncol(data)){
z<-log2(data[x,n]/data[x,2])
}
}

Where x- the row number of the data frame(data).

i want to store the ratios for each row in a object z,  which can be
accessed outside the function. How can i do this?

Thanks,
Vasu.

	[[alternative HTML version deleted]]