[R-sig-Geo] An easy way to extract an irregular volume from a regular SpatialPointsDataFrame

[Mark Connolly]

I am interpolating a SpatialGridDataFrame from an irregular volume.  I 
would like to retrieve the data as the shape of the original volume.  
Any chance there is an easy way to do such a thing?

Mark Connolly

-- 
Graduate Student, Master of Science
Department of Soil Science
North Carolina State University