Initialize.corStruct          package:nlme          R Documentation

_I_n_i_t_i_a_l_i_z_e _c_o_r_S_t_r_u_c_t _O_b_j_e_c_t

_D_e_s_c_r_i_p_t_i_o_n:

     This method initializes 'object' by evaluating its associated
     covariate(s) and grouping factor, if any is present, in 'data',
     calculating various dimensions and constants used by optimization
     algorithms involving 'corStruct' objects (see the appropriate
     'Dim' method documentation), and assigning initial values for the
     coefficients in 'object', if none were present.

_U_s_a_g_e:

     ## S3 method for class 'corStruct':
     Initialize(object, data, ...)

_A_r_g_u_m_e_n_t_s:

  object: an object inheriting from class 'corStruct' representing a
          correlation structure.

    data: a data frame in which to evaluate the variables defined in
          'formula(object)'.

     ...: this argument is included to make this method compatible with
          the generic.

_V_a_l_u_e:

     an initialized object with the same class as 'object' representing
     a correlation structure.

_A_u_t_h_o_r(_s):

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

_R_e_f_e_r_e_n_c_e_s:

     Pinheiro, J.C., and Bates, D.M. (2000) "Mixed-Effects Models in S
     and S-PLUS", Springer.

_S_e_e _A_l_s_o:

     'Dim.corStruct'

_E_x_a_m_p_l_e_s:

     cs1 <- corAR1(form = ~ 1 | Subject)
     cs1 <- Initialize(cs1, data = Orthodont)