question: @ Override protected void forceInsertAttributeAt ( int position ) { double [ ] newValues = new double [ m_AttValues . length + 1 ] ; System . arraycopy ( m_AttValues , 0 , newValues , 0 , position ) ; newValues [ position ] = Utils . missingValue ( ) ; System . arraycopy ( m_AttValues , position , newValues , position + 1 , m_AttValues . length - position ) ; m_AttValues = newValues ; }
target:  Inserts an attribute at the given position (0 to numAttributes()) and sets its value to be missing.