public static double considerEstimatedPreference(final ErrorStrategy errorStrategy, final double recValue) {
        boolean consider = true;
        double v = recValue;
        switch (errorStrategy) {
            default:
            case CONSIDER_EVERYTHING:
                break;
            case NOT_CONSIDER_NAN:
                consider = !Double.isNaN(recValue);
                break;
            case CONSIDER_NAN_AS_0:
                if (Double.isNaN(recValue)) {
                    v = 0.0;
                }
                break;
            case CONSIDER_NAN_AS_1:
                if (Double.isNaN(recValue)) {
                    v = 1.0;
                }
                break;
            case CONSIDER_NAN_AS_3:
                if (Double.isNaN(recValue)) {
                    v = 3.0;
                }
                break;
        }
        if (consider) {
            return v;
        } else {
            return Double.NaN;
        }
    }
public static double considerEstimatedPreference ( final ErrorStrategy errorStrategy , final double recValue ) { boolean consider = true ; double v = recValue ; switch ( errorStrategy ) { default : case CONSIDER_EVERYTHING : break ; case NOT_CONSIDER_NAN : consider = ! Double . isNaN ( recValue ) ; break ; case CONSIDER_NAN_AS_0 : if ( Double . isNaN ( recValue ) ) { v = 0.0 ; } break ; case CONSIDER_NAN_AS_1 : if ( Double . isNaN ( recValue ) ) { v = 1.0 ; } break ; case CONSIDER_NAN_AS_3 : if ( Double . isNaN ( recValue ) ) { v = 3.0 ; } break ; } if ( consider ) { return v ; } else { return Double . NaN ; } }
Method that returns an estimated preference according to a given value
and an error strategy.

@param errorStrategy the error strategy
@param recValue the predicted value by the recommender
@return an estimated preference according to the provided strategy