[R-sig-Geo] extracting values from rasters

[Camilo Mora]

Hi:
I wonder if anyone knows a function to extract values from one raster  
to another raster when the rasters differ in resolution and extent. In  
other words extracting values just in overlapping cells.

This is my specific problem: I have two rasters (one is for  
temperature worldwide and the other is for the presence of reefs also  
worldwide (the presence of reefs have values of 1 and all other cells  
as NA)). (the rasters differ in resolution and extent). I just need to  
put the values of the raster of temperature to each cell in the raster  
of reefs. Will you know a function that may do this?

thanks,

Camilo





Camilo Mora, Ph.D.
Department of Geography, University of Hawaii
Currently available in Colombia
Phone:   Country code: 57
          Provider code: 313
          Phone 776 2282
          From the USA or Canada you have to dial 011 57 313 776 2282
http://www.soc.hawaii.edu/mora/