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Answers
I think its standard pearson correlation with by using the integer mapping of the classes.
~Martin
Dortmund, Germany
Hi,
Just looked up the Java doc and here is what it says: Computes the empirical corelation coefficient 'r' between label and prediction. For
P=prediction, L=label, V=Variance, Cov=Covariance
we calculate r by:Cov(L,P) / sqrt(V(L)*V(P))
So it is the Pearson correlation between the label and the prediction. Judging from a quick check of the source code itself this description is accurate.
Cheers,
Ingo