Hi, I guess your function has several local minima and depending on where you start, i.e. your initial variables, you get into another mimimum.
HTH Armin ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
