[R] How to extract every nth element from a vector

[Thomas Lumley]

On Wed, 28 Mar 2001, Barry Cooke wrote:

> R-helpers:
>
> Is there a simple way to extract every nth element from a very long vector?
>
> [The vector I want to sample from is an object returned by lowess(). It is
> so long (11,628 pairs of elements) that it is causing non-R-related memory
> problems elsewhere. I don't see a better way other than sampling the output
> returned from lowess.]

seq(1,11628,length=1000) will give 1000 evenly spaced numbers from 1:11628
that you can then index with.

	-thomas


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