Hi Jason, I just started to use HPforest and quickly went though the SAS documentation. There are still a few questions in my mind: a) Does VARS_TO_TRY=n mean that SAS randomly select n variables from all the N variables each time to split? And these n varables are not the same among different splits? b) What does a negative Loss Reduction Gini number mean? Do we have some measure to tell us that some of the variables are not important for the model, like p-value in a Logistic Regression? c) Any consensus regarding the better prediction approach between RF and Logistic Regression? Many thanks! Hongguang
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