get the set matchings purity first : second clustering normalized , 1 = equal concode_field_sep double smPurity concode_elem_sep double smInversePurity concode_elem_sep double smFSecond concode_elem_sep double smFFirst concode_field_sep double inversePurity concode_elem_sep double f1Measure concode_elem_sep double fMeasureSecond concode_elem_sep double fMeasureFirst
double function ( ) { return smPurity ; }