Hi,
I have experience in SAS but I'm having trouble using SAS EM. I have a few questions:
1. How is purity measured/ranked?
2. Is the purity of a node based on the training data or the validation data?
3. Why is the purity of a node indicated by training/validation (answer to number 2) data?
4. How do you know (by looking at a tree), which nodes are the purist?
Thanks