It looks like gbm, glm all has this issue I wonder if any R package is immune of this?
In reality, it is very normal that test data has data unseen in training data. It looks like I have to give up R? Thanks! [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.