[R] is there a way to let R do smart matrix-vector operation?
Anders Nielsen
andersn at hawaii.edu
Tue Mar 7 00:27:09 CET 2006
Hi Michael,
Try:
A-as.vector(B)
Cheers,
Anders.
On Monday 06 March 2006 01:10 pm, Michael wrote:
> 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
>
> [[alternative HTML version deleted]]
>
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