FPE - Cross-validation "internal" criterion.
Ycalc and Yexp are the calculated and target values, n is the number of observations in the data set, and N is the number of terms in the model.
The model is optimised to calculate a minimum value of this criterion for the training set.
See FAQ if you have questions. How to cite this applet? Are you looking for a new job in chemoinformatics?
RR - External VALIDATION set will be used.
RR=SUM(Ycalc-Yexp)2/n, where n is the number of observations in the external set.