Dear R colleagues!
 I´d like to start my participation in this list by describing my current problem: inside my area of study I need to compare precipitation data from two different sources: both station (total of 86) and a grid (at 8km) of satellite estimates.
  My specific objective is to interpolate the station data into a regular grid in the same resolution of the satellite estimates, preferentially having control of the spatial domain (lat/lon coordinates). As far as I know this is the correct way of making such comparison.
  Could anybody please point directions to perform this task using R? I´m such a beginner that I don´t even know if
 there´s a package designed to create regular grids from "random" data (interpolating by kriging or other technique). Usage examples would be welcomed as well!
Thanks in advance,
 Thiago.



      
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