Re: Selecting every other line from a data frame

[Tony Plate <tplate@blackmesacapital.com>]

> d <- data.frame(x=1:10, y=LETTERS[1:10])
> seq(nrow(d))
 [1]  1  2  3  4  5  6  7  8  9 10
> d[(seq(nrow(d)) %% 2) == 1, ]
  x y
1 1 A
3 3 C
5 5 E
7 7 G
9 9 I
>

Khan, Sohail wrote:
> Dear All,
>
> I have a large data frame, from which I want to only select every other line or 
> odd lines.
> How can I do this?  Thanks.
>
>
> Sohail Khan
> Scientific Programmer
> COLD SPRING HARBOR LABORATORY
> Genome Research Center
> 500 Sunnyside Boulevard
> Woodbury, NY 11797
> (516)422-4076
>
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