Marsha Melnyk wrote:
>
> I don't know if there is a way to do this in R but I want to subtract
> within the same column from different rows. I want to subtract
> c(r)-c(r-1) and continue down the column until they are all calculated
> and form another column. Again I don't know if R can do
If I understand what you're asking this is one (although probably not
the easiest or best) way:
X <- as.data.frame(matrix(runif(50), nrow=10))
X.tmp <- rbind(rep(NA, dim(X)[2]), X[1:(dim(X)[1]-1),])
X.new <- X - X.tmp
-Ista
On Sun, Oct 25, 2009 at 5:45 PM, Marsha Melnyk wrote:
> I don't know
I don't know if there is a way to do this in R but I want to subtract
within the same column from different rows. I want to subtract
c(r)-c(r-1) and continue down the column until they are all calculated
and form another column. Again I don't know if R can do this but I
thought I would ask.
T
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