[R] Classifying boolean values

[Sarah Goslee]

It's likely that class is numeric and you actually want factor
(regression tree vs classification tree).

str(echoknn.train) will show you.

By saying, "I have to build a tree classifier" you make me think that
this is a course assignment. If it is, you should perhaps talk to your
instructor. If not, then a more detailed and reproducible example will
usually get you a more informative answer, since it will allow people
to actually run and debug your code.

Sarah

On Tue, Jun 7, 2011 at 11:47 AM, Grifone <fabio.podda at alice.it> wrote:
> Hi to all, I'm new to this forum and new to R. I have to build a tree
> classifier that has boolean values as response.
> When I build the tree with:
>
> echoknn.tree <- tree(class ~ ., data=echoknn.train)
>
> where "class" is a coloumn of my dataset (echoknn.train) of boolean values,
> the result is a tree where leaf nodes are numbers in the range [0,1]; but
> this isn't the result that I expect to have. I'd want that result of
> classifier is TRUE or FALSE.
> Can someone help me?
>
> Thanks.
>
> Fabio
>
>


-- 
Sarah Goslee
http://www.functionaldiversity.org