using gwr for interpolation

Can I use gwr for interpolation?

I would for example use something like

library(spgwr)
data(meuse)
coordinates(meuse) = ~x+y
data(meuse.grid)
gridded(meuse.grid) = ~x+y
x = gwr(cadmium ~ dist, meuse, bandwidth = 228, fit.points = meuse.grid)
spplot(x$SDF["gwr.e"])

But it doesn't give what I'd expected - somehow nicely interpolated
cadmium values. I probably misused fit.points, but I couldn't see any
predict method. Is this possible at all?

Edzer Pebesma
Institute for Geoinformatics (ifgi), University of M?nster
Weseler Stra?e 253, 48151 M?nster, Germany. Phone: +49 251
8333081, Fax: +49 251 8339763 http://ifgi.uni-muenster.de/
http://www.springer.com/978-0-387-78170-9 e.pebesma at wwu.de