[R] how to divide each column in a matrix by its colSums?
casperyc
casperyc at hotmail.co.uk
Sun Nov 28 21:46:32 CET 2010
Hi,
I have a matrix, say
m=matrix(c(
983,679,134,
383,416,84,
2892,2625,570
),nrow=3
)
i can find its row/col sum by
rowSums(m)
colSums(m)
How do I divide each row/column by its rowSum/colSums and still return in
the matrix form?
(i.e. the new rowSums/colSums =1)
Thanks.
Casper
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