array reduction

I was wondering if there is a clever way to get every other element of a 2D array, and put it
in a new array. I have a global data file at 1/12 degree resolution and would like to make one
at 1/6 degree resolution. I know I can do this in a nested loop, but it might be pretty slow
(over 900000 points).

Any help you can give is greatly appreciated.

Thanks,

Brian

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Received on Thu Jun 20 13:37:23 2013