[R] sums of absolute deviations about the median as split function in rpart

From: Sina Muster <sina.muster_at_web.de>
Date: Thu 16 Feb 2006 - 23:23:56 EST


Dear R community,

as stated in Breiman et.al. (1984) and De'Ath & Fabricius (2000) using sums of absolute deviations about the median as an impurity measure gives robust trees.

I would like to use this method in rpart.

Has somebody already tried this method in rpart? Is there maybe already a script available somewhere?

I am aware of the possibility to define usersplits myself with eval, split and init. As an R beginner, though, I would like to check the existing experience first.

Thanks
Sina

Writing a thesis on "The effects of land-use change on vegetation patterns in a Southern-Alpine valley (Switzerland)"

University of Potsdam, Germany
Department of Geoecology



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 Received on Thu Feb 16 23:42:41 2006

This archive was generated by hypermail 2.1.8 : Mon 20 Feb 2006 - 14:08:29 EST