Desktop Survival Guide
by Graham Williams

Tuning Parameters

Implementations of the decision tree algorithm usually provide a collection of parameters for tuning how the tree is built. The defaults in Rattle (based on rpart's defaults) often provide a basically good tree. They are certainly a very good starting point, and indeed may be a satisfactory end point! However, tuning will be necessary where, for example, the target variable has very few examples of the particular class of interest.


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