question: public double [ ] [ ] confusionMatrix ( ) { double [ ] [ ] newMatrix = new double [ m_ConfusionMatrix . length ] [ 0 ] ; for ( int i = 0 ; i < m_ConfusionMatrix . length ; i ++ ) { newMatrix [ i ] = new double [ m_ConfusionMatrix [ i ] . length ] ; System . arraycopy ( m_ConfusionMatrix [ i ] , 0 , newMatrix [ i ] , 0 , m_ConfusionMatrix [ i ] . length ) ; } return newMatrix ; }
target:  Returns a copy of the confusion matrix.