On Thu, 1 Sep 2011, Olavo Borges D'Antonio wrote:
Hello,
I was following the sample in the grass book and I'm getting a error message
using gstat.cv.
message is:
pe1 <- gstat.cv(t2, debug.leve=0, random=FALSE)$residual
Error in unique(fold) : object 'fold' not found
I appreciate if anyone could show me where is the error.
You should include more information, at least the command creating t2,
sessionInfo() output, and the output of traceback() run immediately after
the error. If you can create a reproducible example, that would also help.
Roger
thanks.
--
Roger Bivand
Department of Economics, NHH Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: [email protected]
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