

pooledSD(nlme)                               R Documentation

_E_x_t_r_a_c_t _P_o_o_l_e_d _S_t_a_n_d_a_r_d _D_e_v_i_a_t_i_o_n

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

     The pooled estimated standard deviation is obtained by
     adding together the residual sum of squares for each
     non-null element of `object', dividing by the sum of
     the corresponding residual degrees-of-freedom, and tak-
     ing the square-root.

_U_s_a_g_e_:

     pooledSD(object)

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

  object: an object inheriting from class `lmList'.

_V_a_l_u_e_:

     the pooled standard deviation for the non-null elements
     of `object', with an attribute `df' with the number of
     degrees-of-freedom used in the estimation.

_A_u_t_h_o_r_(_s_)_:

     Jose Pinheiro and Douglas Bates

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

     `lmList', `lm'

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

     library(nlme)
     data(Orthodont)
     fm1 <- lmList(Orthodont)
     pooledSD(fm1)

