_P_a_r_t_i_a_l _S_t_r_i_n_g _M_a_t_c_h_i_n_g
	
	     pmatch(x, table, nomatch = NA)
	     charmatch(x, table, nomatch = NA)
	
	_A_r_g_u_m_e_n_t_s:
	
	           x : the values to be matched.
	
	       table : the values to be matched against.
	
	     nomatch : the value returned at non-matching positions.
	
	_D_e_s_c_r_i_p_t_i_o_n:
	
	     pmatch seeks matches for the elements of its first
	     argument among those of its second.  If there is a
	     unique match then the index of the matching value is
	     returned; if multiple matches are found then 0 is
	     returned and if no match is found then NA is returned.
	
	     This function is based on Terry Therneau's charmatch S
	     function.  In R, charmatch is synonym to pmatch.
	
	_S_e_e _A_l_s_o:
	
	     match.
	
	_E_x_a_m_p_l_e_s:
	
	     pmatch("m",   c("mean", "median", "mode")) # returns 0
	     pmatch("med", c("mean", "median", "mode")) # returns 2