If your matrices are the same size, you can just add them. If they aren't the
same size, I'm not sure what you are trying to accomplish.
> mat1 <- matrix(1:9, nrow=3)
> mat1
[,1] [,2] [,3]
[1,] 1 4 7
[2,] 2 5 8
[3,] 3 6 9
> mat2 <- matrix(runif(9), nrow=3)
> mat2
[,1] [,2] [,3]
[1,] 0.54837515 0.3476839 0.6298484
[2,] 0.25790633 0.3394281 0.3601670
[3,] 0.08251705 0.2288201 0.4216952
>
> mat1 + mat2
[,1] [,2] [,3]
[1,] 1.548375 4.347684 7.629848
[2,] 2.257906 5.339428 8.360167
[3,] 3.082517 6.228820 9.421695
On Thu, May 21, 2009 at 11:08 AM, daniele riggi <daniele.ri...@gmail.com> wrote:
> Someone knows the existence of a function to sum the elements of the same
> place A[i,j] B[i,j] of a matrix?thank you
>
>
--
Sarah Goslee
http://www.functionaldiversity.org
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