Time                   package:drm                   R Documentation

_I_d_e_n_t_i_f_y _o_r_d_e_r_i_n_g _o_f _t_h_e _r_e_s_p_o_n_s_e_s

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

     This is a special function used in the 'drm' or 'depratio' syntax.
     It identifies the ordering in correlated groups of observations,
     and is used on the right hand side of a formula.

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

     Time(x)

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

       x: A factor, or numeric variable.

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

     The function's only action is semantic, to mark a variable as the
     Time indicator.

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

     'drm', 'depratio', 'cluster'

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

     formula(wheeze~cluster(id)+Time(age))

