[R] A one-liner to create a 3-dim array

Rolf Turner rolf at math.unb.ca
Mon Jul 25 20:24:01 CEST 2005

	B <- array(apply(A,1,function(x){x%o%x}),dim=c(nrow(A),dim(A)))


					Rolf Turner
					rolf at math.unb.ca

Ravi Varadhan wrote:

>  I would like to write a one-line R code to create a 3-dim array, B, of
>  dimension (n,n,m) from a matrix, A, of dimension (m,n) such that the i-th
>  element of the 3-dim array, B[, , i]  is the outer product of the i-th row
>  of A.

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