Re: [R] how to make a contour plot using data in long format

From: Dieter Menne <dieter.menne_at_menne-biomed.de>
Date: Fri 14 Jul 2006 - 17:59:28 EST

Maria Wang <mariayzw <at> hotmail.com> writes:

>
> There is a dataset with Latitude Longitude information and corresponding
> value shaped like this:
> Lati Longi Value
> 18.0001 -159.6667 123
> 18.0023 -159.6665 124
> I want to use this data to make a filled contour map imposed on an USA map.
....

Best use package geoR. There are also some examples in MASS (chapter 14).

Dieter



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