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

[Uwe Ligges]

Christian Schulz wrote:
> Hello,
> 
> 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)])))) ~ . , 

I guess you want something along the following example:

   train <- iris
   form <- as.formula(paste(names(train)[length(train)], "~ ."))
   rpart(form, data = iris)

or some data.frame method for rpart....

Uwe Ligges


> data=train,cp=0.0001)
> 
> regards & many thanks
> Christian
> 
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