[R] Add a vector to the values in a specific dimension of an array

From: huron <thomas.j.best_at_gmail.com>
Date: Wed, 18 May 2011 20:47:08 -0700 (PDT)


Hello,

A simple question, although I can't find an answer via my google/forum search:

I have a 4-dimensional array; call it A[1:M,1:N,1:P,1:Q]. I have a vector x that is N by 1.

I would like to "quickly" add x to the 2nd dimension of A; in other words, I want a quicker way of doing the following:

for (m in 1:M) {
  for (p in 1:P) {
    for (q in 1:Q) {
      A[m,,p,q] = A[m,,p,q] + x
    }
  }
}

Thanks in advance!

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Received on Thu 19 May 2011 - 05:21:40 GMT

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