private void normalize ( DoubleVector v ) { double magnitude = 0 ; for ( int i = 0 ; i < v . length ( ) ; ++ i ) magnitude += Math . pow ( v . get ( i ) , 2 ) ; if ( magnitude == 0 ) return ; magnitude = Math . sqrt ( magnitude ) ; for ( int i = 0 ; i < v . length ( ) ; ++ i ) v . set ( i , v . get ( i ) / magnitude ) ; }
Performs l2 - normalization on the vector in place . If the magnitude of the vector is 0 the values are left unchanged .