[R] overlaying a levelplot on a map plot

David Winsemius dwinsemius at comcast.net
Thu Apr 22 15:37:48 CEST 2010

On Apr 22, 2010, at 5:33 AM, Simon Goodman wrote:

> Thanks for the suggestions.... Unfortunately contour won't in this  
> case as it
> expects the x,y values to be in an ascending sequence.



David Winsemius, MD
West Hartford, CT

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