Hi all,

I want to substract vector B from A's each column... how can R do that
smartly without a loop?

> A=matrix(c(2:7), 2, 3)
> A
     [,1] [,2] [,3]
[1,]    2    4    6
[2,]    3    5    7
> B=matrix(c(1, 2), 2, 1)
> B
     [,1]
[1,]    1
[2,]    2
> A-B
Error in A - B : non-conformable arrays

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