Hi I would like to fit a function H = F(x,y,z) but I do not know the analytical expression of H, is there a way to get the best 3d polynomial (in x,y,z) which fits H e.g H<-seq(2,200,len=50) x<-seq(1,50,len=50) y<-seq(50,300,len=50) x<-seq(30,80,len=50)
so it is a sort of fitting a 4 dimensional surface to a regular grid any suggestions are very much appreciated best regards Karim ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
