Raphael,
you could read your shapefile with readOGR in package rgdal,
then use function overlay to find the points in the polygon,
along the lines of:
# grd is your full, rectangular grid
# polygon is the shapefile you read
require(sp)
fullgrid(grd) = FALSE
sel = !is.na(overlay(grd, polygon))
grd
Hello,
I have been using gstat to krige maps over my study area.
The area is irregularly shaped and has quite a complex boundary.
I have made a regular (square) grid that covers my study area and made
my estimates on this grid.
Now that I have my maps, I would like to 'mask out' or delete the
