[R] decision/classification trees with fewer than 20 objects

[patriciagraf at aon.at]

Hi!

I'm trying to construct and plot a decision tree to class a set of only 8 objects and tried to use the rpart and tree function, but get a error message both times:

rpart: fit is not a tree, just a root

tree: cannot plot singlenode tree

I read in the post 'question regression trees' that rpart doesn't split a set of fewer than 20 objects...so I guess the same holds true for the tree function?

My questions therefore are:

How can I change the function arguments in either the rpart or the tree function so they work for a set of less than 20 objects? I looked at the function body, but since I'm new to R, I couldn't find the according argument.

Or is there any other decision tree function for small datasets?

Many Thanks,
Patricia