Assuming that the number of rows is even and that your matrix is A,
element-wise product of pairs of rows can be calculated as
A[seq(1,nrow(A),by=2),]*A{seq(2,nrow(A),by=2),]
--- On Mon, 28/7/08, rcoder <[EMAIL PROTECTED]> wrote:
> From: rcoder <[EMAIL PROTECTED]>
> Subject: [R] product of successive rows
> To: r-help@r-project.org
> Received: Monday, 28 July, 2008, 8:20 AM
> Hi everyone,
>
> I want to perform an operation on a matrx that outputs the
> product of
> successive pairs of rows. For example: calculating the
> product between rows
> 1 & 2; 3 & 4; 5 & 6...etc.
>
> Does anyone know of any readily available functions that
> can do this?
>
> Thanks,
>
> rcoder
>
>
> --
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>
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