code: public static void normalizeF( DMatrixRMaj A ) {
          double val = normF(A);
  
          if( val == 0 )
              return;
  
          int size = A.getNumElements();
  
          for( int i = 0; i < size; i++) {
              A.div(i , val);
          }
      }
docs: Normalizes the matrix such that the Frobenius norm is equal to one.
  
  @param A The matrix that is to be normalized.