Dear all,
'Apply' is a great thing for running functions on rows or columns of a
matrix:
X <- rnorm(20, mean = 0, sd = 1)
dim(X) <- c(5,4)
apply(X,2,sum)
Is there a way to use apply for excluding rows or columns from a matrix
to run functions on the remaining rows or columns? I know, I could do
this with a 'for' loop, but 'apply' would be much easier and quicker,
and require less programming...
Cheers, Christian
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