Thought some of you might like this.

http://bennolan.com/2010/09/10/contour-maps.html

I'm loving learning R. Very cool. I'd like to use it for some proper
analysis though (epidemiology or something), instead of tweet maps. :)

-- Regards,
Ben Nolan

http://bennolan.com/

skype: bennolan
cell: +64 21 770 662

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