question: private double norm ( double x , int i ) { if ( Double . isNaN ( m_Min [ i ] ) || Utils . eq ( m_Max [ i ] , m_Min [ i ] ) ) { return 0 ; } else { return ( x - m_Min [ i ] ) / ( m_Max [ i ] - m_Min [ i ] ) ; } }
target:  Normalizes a given value of a numeric attribute.