yline                package:funfits                R Documentation

_D_r_a_w _a _h_o_r_i_z_o_n_t_a_l _l_i_n_e

_U_s_a_g_e:

     yline(y, ...)

_A_r_g_u_m_e_n_t_s:

       y: Value on y axis specifying location of horizontal line. 

     ...: Any ploting options for abline function. 

_E_x_a_m_p_l_e_s:

     plot(ozone$x[,2],ozone$y) #plot ozone longitude vs ozone value
     yline(40) #plots horizontal line at ozone value of 40

