

NLSstRtAsymptote {nls}                       R Documentation

_H_o_r_i_z_o_n_t_a_l _A_s_y_m_p_t_o_t_e _o_n _t_h_e _R_i_g_h_t _S_i_d_e

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

     Provide an initial guess at the horizontal asymptote on
     the right side (i.e. large values of `x') of the graph
     of `y' versus `x' from the `xy' object.  Primarily used
     within `initial' functions for self-starting nonlinear
     regression models.

_U_s_a_g_e_:

     NLSstRtAsymptote(xy)

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

      xy: a `sortedXyData' object

_V_a_l_u_e_:

     A single numeric value estimating the horizontal asymp-
     tote for large `x'.

_A_u_t_h_o_r_(_s_)_:

     Jose Pinheiro and Douglas Bates

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

     `sortedXyData', `NLSstClosestX', `NLSstRtAsymptote',
     `selfStart'

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

     library( nls )
     data( DNase )
     DNase.2 <- DNase[ DNase$Run == "2", ]
     DN.srt <- sortedXyData( expression(log(conc)), expression(density), DNase.2 )
     NLSstRtAsymptote( DN.srt )

