Hi, In the course of cross validation of linear model use the R script below
*lin.kcv <- krige.cv <http://krige.cv>(yield ~ 1, canmod.sp, model = lin.var,nmax=100, nfold = 5)* I received a warning message Warning message:In sqrt(ret[[var.name]]) : NaNs produced This gives me strange value of RMSE to be 364.9795 But I got reasonable result for other model like Spherical 0.6618279 Gaussian 0.6216419 Exponential 0.6498786 What does this error message means? Thank you. [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-geo
