[R]:?alternative to loop

[Jonathan Baron]

for the application of a function to each column of a matrix (ex:
function sum()), i'd like to know if there is a simpler (and faster)
alternative to a loop like :

for (i in 1: ncol(m)){sum(m[i])}

--------

apply(m,2,sum)

will do it.  The "2" means "columns".  If you want rows, use "1".
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