no, it won't.

you're doing the right math on the "valid" subset... but you're not returning the zeros where needed.... therefore, the whole thing will get recycled to match the dimensions.

b

On Mar 6, 2008, at 2:03 PM, Henrique Dallazuanna wrote:

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 <[EMAIL PROTECTED]> 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

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

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