[R-sig-Geo] extracting data from raster

[LOUZAO]

Hello,

I would like to extract data from a raster in R (sst for example) but I 
have two queries for you. The sst data is built in a 0.05dg cell size 
but I would like to extract the data for a 0.15dg cell size. So,

- First, I need to create an empty grid of 0.15dg. I have done it with 
the arcgen () function using the Adehabitat package.
- Second, I need a function to overlap both rasters and extract data 
(the median, maximum and minimum) from the 0.05dg raster to the 0.15dg 
raster. How could I do that? I have been searching but I have found a 
direct function. But I think that it should be done.

Thanks in advance,

Maite

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Maite Louzao Arsuaga
Postdoctoral Researcher

Centre d'Etudes Biologiques de Chizé - CNRS UPR1934 
79360 Villiers-en-Bois, France 
Tel: +33 (0)5.49.09.35.57
Fax: +33 (0)5.49.09.65.26 
http://www.cebc.cnrs.fr/
**************************




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