lmeScale                package:nlme                R Documentation

_S_c_a_l_e _f_o_r _l_m_e _O_p_t_i_m_i_z_a_t_i_o_n

_D_e_s_c_r_i_p_t_i_o_n:

     This function calculates the scales to be used for each
     coefficient estimated through an 'nlm' optimization in the 'lme'
     function. If all initial values are zero, the scale is set to one
     for all coefficients; else, the scale for a coefficient with
     non-zero initial value is equal to the inverse of its initial
     value and the scale for the coefficients with initial value equal
     to zero is set to the median of the non-zero initial value
     coefficients.

_U_s_a_g_e:

     lmeScale(start)

_A_r_g_u_m_e_n_t_s:

   start: the starting values for the coefficients to be estimated.

_V_a_l_u_e:

     a vector with the scales to be used in 'nlm' for estimating the
     coefficients.

_A_u_t_h_o_r(_s):

     Jose Pinheiro Jose.Pinheiro@pharma.novartis.com and Douglas Bates
     bates@stat.wisc.edu

_S_e_e _A_l_s_o:

     'nlm'