oddvals <- seq(1, ncol(mydata), by=2) mydata[,oddvals] On Wed, Mar 9, 2011 at 9:20 AM, Nixon, Matthew <m.r.ni...@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.
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