Generate a residual tree on a subset of the data specified by the factor level mainfaclev (main factor level)
saveTree(
data,
vars,
expr,
i,
varname,
mainfaclev,
treeGenerationMinBucket,
...
)
A tree object
A dataframe containing the residual and some predictors
A list of candidate predictors
A expression to be modelled by the RPART tree
An integer corresponding to the factor level
A string corresponding to the name of the factor variable being analysed
A level of the mainfac factor
Minimum size for tree generation
and parameters to be passed through