getCovariate.data.frame         package:nlme         R Documentation

_E_x_t_r_a_c_t _D_a_t_a _F_r_a_m_e _C_o_v_a_r_i_a_t_e

_D_e_s_c_r_i_p_t_i_o_n:

     The right hand side of 'form', stripped of any conditioning
     expression (i.e. an expression following a '|' operator), is
     evaluated in 'object'.

_U_s_a_g_e:

     ## S3 method for class 'data.frame':
     getCovariate(object, form, data)

_A_r_g_u_m_e_n_t_s:

  object: an object inheriting from class 'data.frame'.

    form: an optional formula specifying the covariate to be evaluated
          in 'object'. Defaults to 'formula(object)'.

    data: some methods for this generic require a separate data frame.
          Not used in this method.

_V_a_l_u_e:

     the value of the right hand side of 'form', stripped of any
     conditional expression, evaluated in 'object'.

_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:

     'getCovariateFormula'

_E_x_a_m_p_l_e_s:

     data(Orthodont)
     getCovariate(Orthodont)

