Thanks to everyone for the replies to my question. There are several good algorithms to make decision trees with multivariate splits (sometimes called oblique trees), some are even freeware (QUEST, CRUISE...), but most are not open-sourced.
Unfortunately there seems to be no good choice for oblique trees in R now. Mvpart seems to be really fancy, although it cannot handle splits on the linear combination of the covariates. Rweka might be useful, but it still takes some time for me to get used to its "language". I'll see where I get. Thanks again and bye: Bálint -- Czúcz Bálint PhD hallgató BCE KTK Talajtan és Vízgazdálkodás Tanszék 1118 Budapest, Villányi út 29-43. ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
