[R] How to?

Yves Gauvreau cyg at sympatico.ca
Thu Aug 24 16:13:05 CEST 2000


Is there a way to apply a function to rows or columns of a matrix?

Now I use apply(as.matrix(1:nrow(m), 1, function(x) mean(m[x,])) which works
fine but kind of slow on large matrix. I'm sure there is something on this
somewhere but I can't find it.


Yves Gauvreau

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