yline                 package:fields                 R Documentation

_D_r_a_w _h_o_r_i_z_o_n_t_a_l _l_i_n_e_s

_D_e_s_c_r_i_p_t_i_o_n:

     Adds  horizontal lines in the plot region.

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

     yline(y, ...)

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

       y: Values on y axis specifying location of vertical lines.  

     ...: Any ploting options for abline.  

_S_e_e _A_l_s_o:

     xline, abline

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

     world( col=3)
     yline( seq( -80,80,10),col=4, lty=2)
     xline( seq( -180,180,10),col=4,lty=2)
     yline( 0, lwd=2, col=4)

