_C_o_m_b_i_n_e _R_o_w_s _i_n_t_o _a _M_a_t_r_i_x
	
	     rbind(...)
	
	_D_e_s_c_r_i_p_t_i_o_n:
	
	     rbind takes a sequence of vector arguments and combines
	     them as the rows of a matrix.  If the vectors differ in
	     length, the values in the shorter ones are recycled so
	     that their effective length is equal to that of the
	     longest argument.
	
	_S_e_e _A_l_s_o:
	
	     cbind, c.
	
	_E_x_a_m_p_l_e_s:
	
	     rbind(1,1:n)