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