[R] array slice notation?

Steve Jaffe sjaffe at riskspan.com
Tue Aug 4 21:54:53 CEST 2009

Yes, I was thinking more in terms of mental operations than physical.
I think the following works, but it doesn't seem entirely transparent :-)

Given array A, and a vector of row indices v  (ie 1 <= v <= dim(A)[1]), the
slice of rows v is

A[ outer(v, dim(A)[1]*( 1:prod(dim(A)[-1])-1 ), '+') ]

Steve Lianoglou-6 wrote:
> You actually don't have to convert A to a vector, you can use vector- 
> style indexing into a matrix:

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