getCovariate              package:nlme              R Documentation

_E_x_t_r_a_c_t _C_o_v_a_r_i_a_t_e _f_r_o_m _a_n _O_b_j_e_c_t

_D_e_s_c_r_i_p_t_i_o_n:

     This function is generic; method functions can be written to
     handle specific classes of objects. Classes which already have
     methods for this function include 'corStruct', 'corSpatial',
     'data.frame', and 'varFunc'.

_U_s_a_g_e:

     getCovariate(object, form, data)

_A_r_g_u_m_e_n_t_s:

  object: any object with a 'covariate' component

    form: an optional one-sided formula specifying the covariate(s) to
          be extracted. Defaults to 'formula(object)'.

    data: a data frame in which to evaluate the variables defined in
          'form'. 

_V_a_l_u_e:

     will depend on the method function used; see the appropriate
     documentation.

_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, esp. p. 100.

_S_e_e _A_l_s_o:

     'getCovariate.corStruct', 'getCovariate.data.frame',
     'getCovariate.varFunc', 'getCovariateFormula'

_E_x_a_m_p_l_e_s:

     ## see the method function documentation