R help - Dec 2009 - problem in labeling the nodes of tree drawn by rpart

Hi all,

I used rpart to fit a model, where the covariates in the model are
categorical variables.
Then I plotted the tree (mytree) and used the command "text" to add
labels
to the tree.

In the nodes of the tree, the values of the covariates are represented with
a, b or c.
Is there a way to show the real value(s) of the variable in the nodes
instead of a, b or c ?
I found that the command "labels(mytree,minlength=3)" can give me the
desired label, but I don't know how to add it to the tree.


Best,
Kaida
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Hi all,

I used rpart to fit a model, where the covariates are categorical variables.
Then I plotted the tree (mytree) and used the command "text" to add
labels
to the tree.

In the nodes of the tree, the values of the covariates are represented with
a, b or c (tree attached).
Is there a way to show the real value(s) of the variable in the nodes
instead of a, b or c ?
I found that the command "labels(mytree,minlength=3)" can give me the
desired label, but I don't know how to add it to the tree.


Best,
Kaida
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> In the nodes of the tree, the values of the covariates are represented
> with a, b or c (tree attached).
Try help('text.rpart'), and note the 'pretty' argument therein.
There is often not enough room for long labels, and so the default is to
do the severe truncation you speak of.

Terry Therneau