[R] Array arithmetic

[Henrique Dallazuanna]

I think this should work:

array(A[abs(B) > 10e-5]/B[abs(B) > 10e-5], dim=c(L, M, N, P))

On 06/03/2008, Gang Chen <gangchen6 at gmail.com> wrote:
> I have two arrays A and B with dimensions of (L, M, N, P) and (L, M,
>  N), and I want to do
>
>  for (i in 1:L) {
>  for (j in 1:M) {
>  for (k in 1:N) {
>    if (abs(B[i, j, k]) > 10e-5)  C[i, j, k,] <- A[i, j, k,]/B[i, j, k]
>    else C[i, j, k,] <- 0
>  }
>  }
>  }
>
>  How can I get C more efficiently than looping?
>
>  Thanks,
>  Gang
>
>  ______________________________________________
>  R-help at r-project.org mailing list
>  https://stat.ethz.ch/mailman/listinfo/r-help
>  PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>  and provide commented, minimal, self-contained, reproducible code.
>


-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O