[R] is there a way to let R do smart matrix-vector operation?

[Anders Nielsen]

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
>
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>
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