Distributions of the TP and FN classes for the RRL stars in all tiles according to the three most important features to differentiate them. In the top row all the stars are compared, in the mid row only the RRL-AB type, and in the low row the RRL-C type. Left column corresponds to period_fit, mid column to Psi_eta and right column to PeriodLS. All features were converted to z-scores and are dimensionless.