param                 package:nlreg                 R Documentation

_E_x_t_r_a_c_t _A_l_l _P_a_r_a_m_e_t_e_r_s _f_r_o_m _a _M_o_d_e_l - _G_e_n_e_r_i_c _F_u_n_c_t_i_o_n

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

     This function extracts all parameters (regression coefficients, 
     variance parameters etc.) from a fitted model.

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

     param(object, ...)

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

  object: any fitted model object from which parameters may be
          extracted. 

     ...: additional arguments like 'digits' to control how many digits
          should be printed. 

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

     This function is generic (see 'methods'); method  functions can be
     written to handle specific classes of data.   Classes which
     already have methods for this function include:  'nlreg'.

_V_a_l_u_e:

     all parameters (regression coefficients, variance parameters etc.)
      of a fitted model.

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

     'param.nlreg', 'methods'

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

     data(metsulfuron)
     metsulfuron.nl <- 
         nlreg( log(area) ~ log( b1+(b2-b1) / (1+(dose/b4)^b3) ), 
                weights = ~( 1+dose^exp(g) )^2, data = metsulfuron, 
                start = c(b1 = 138, b2 = 2470, b3 = 2, b4 = 0.07, g = log(0.3)),
                hoa = TRUE )
     param( metsulfuron.nl )
     ##          b1           b2           b3           b4            g         logs
     ## 139.0395322 2471.5097481    1.7091297    0.0772535   -1.2582597   -3.8198406

