[R] Extracting only odd columns from a matrix

[Nixon, Matthew]

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.