_V_e_c_t_o_r _M_e_r_g_i_n_g
	
	     append(x, values, after=length(x))
	
	_A_r_g_u_m_e_n_t_s:
	
	           x : the vector to be modified.
	
	      values : to be included in the modified vector.
	
	       after : a subscript, after which the values are to be
	               appended.
	
	_V_a_l_u_e:
	
	     A vector containing the values in x with the elements
	     of values appended after the specified element of x.
	
	_E_x_a_m_p_l_e_s:
	
	     all(append(1:5, 0:1, after=3) ==
	         append(1:3, c(0:1, 4:5)))