Thanks!
________________________________
From: Peter Alspach-2 [via R]
[mailto:ml-node+3618799-1094957657-247...@n4.nabble.com]
Sent: Wednesday, June 22, 2011 9:27 PM
To: Bendik, Nathan
Subject: Re: Subsetting data systematically
Tena koe Nate
You can use the fact that R recycles. If yourData is a
dataframe, then (as examples):
yourData[c(TRUE,FALSE),] will give you every second row,
starting with the first. Similarly,
yourData[c(FALSE,TRUE,FALSE),] will give every third row,
starting with the second; and
yourData[c(TRUE, rep(FALSE,19)),] will give every twentieth row,
starting with the first.
There's also seq().
HTH ....
Peter Alspach.
> -----Original Message-----
> From: [hidden email] [mailto:r-help-bounces@r-
> project.org] On Behalf Of gibberish
> Sent: Thursday, 23 June 2011 11:05 a.m.
> To: [hidden email]
> Subject: [R] Subsetting data systematically
>
> I would like to subset data from a larger dataset and generate
a
> smaller
> dataset. However, I don't want to use sample() because it
does it
> randomly.
> I would like to take non-random subsamples, for example, every
2nd
> number,
> or every 3rd number. Is there a procedure that does this?
>
> Thanks, Nate
>
> --
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