[R] newbie question: ROW average

[Peter Dalgaard]

A Ezhil <ezhil02 at yahoo.com> writes:

> When I tried with (assuming 'M' is my old matrix): 
> 
> dim(M) <- c(4,248,74)
> mn <- apply(M, c(2,3), mean)
> 
> the following error occured:
> Error: dim<- : dims [product 73408] do not match the
> length of object [74]

In that case, M clearly wasn't a 992x74 matrix!

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