Try this:

m <- matrix(rnorm(12), ncol = 4)
m[,c(FALSE, TRUE)]

On Wed, Mar 9, 2011 at 11:20 AM, Nixon, Matthew <M.R.Nixon@exeter.ac.uk>wrote:

> Hi,
>
> This might seem like a simple question but at the moment I am stuck for
> ideas. The columns of my matrix in which some data is stored are of this
> form:
>
> X1     Y1     X2     Y2     X3     Y3     ...     Xn     Yn
>
> with n~100. I would like to look at just the X values (i.e. odd column
> numbers). Is there an easy way to loop round extracting only these columns?
>
> Any help would be appreciated.
>
> Thank you.
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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