diagnostics               package:drc               R Documentation

_I_n_f_o_r_m_a_t_i_o_n _o_n _e_s_t_i_m_a_t_i_o_n

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

     Displays information on the convergence of the estimation
     procedure.

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

     diagnostics(object)

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

  object: an object of class 'drc'.

_D_e_t_a_i_l_s:

     The function displays the convergence status and the number of
     evaluations used.

_A_u_t_h_o_r(_s):

     Christian Ritz

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

     terbuthylazin.m1 <- drm(rgr~dose, data = terbuthylazin, fct = LL.4())
     diagnostics(terbuthylazin.m1)

     terbuthylazin.m2 <- drm(rgr~dose, data = terbuthylazin, start=c(1,0.01,0.38,130), fct = LL.4()) 
     diagnostics(terbuthylazin.m2)  
     ## the start values given result in faster convergence

