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readmat
2004 May 12
1
Random Forest with highly imbalanced data
Hi group,
I am trying to do a RF with approx 250,000
cases. My objective is to determine the risk factors
of a person being readmitted to hospital (response=1)
or else (response=0). Only 10%, or 25,000 cases were
readmitted. I've heard about down-sampling and class
weight approach and am wondering if R can do it. Even
some reference to articles will help.
>From the statistical point of view, is there any rule
of th...