[R] paste dependent variable in formula (rpart)?

From: Christian Schulz <ozric_at_web.de>
Date: Sun, 16 Dec 2007 20:16:58 +0100


i'm trying to replace different target variables in rpart with a function. The data.frame getting always the target variable as last column. Try below, i get the target variable in the explained variables, too!? Have anybody an advice to avoid this.

rp1 <- rpart(eval(parse(text=paste(names(train[length(train)])))) ~ . , data=train,cp=0.0001)

regards & many thanks

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