[R] multiplying columns in matrix

[Bert Gunter]

(Assuming I get your meaning) Sounds like a homework exercise ...

The perhaps simplest way to do this is directly with a loop and
indexing. Did you think about this at all, as this seem fairly obvious
to me.

As an exercise for the reader, it can also be (very simply) done by
vectorizing the calculation, at the cost of greater memory usage.

Sorry, no further hints.

-- Bert

On Wed, Nov 16, 2011 at 1:24 PM, Eli Cohen <rfur123 at gmail.com> wrote:
> Say I have two matrixes: one is 8x28 and other 8x8
>
> I'd like to multiply, for example, first and second column from the 8x8 and
> plant them in first column of 8x28.
>
> Then take first and third of 8x8 and plant into second column of 8x28.etc.
>
>
>
> Any ideas?
>
>
>
> Thanks!
>
>
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>
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-- 

Bert Gunter
Genentech Nonclinical Biostatistics

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