pooledSD                package: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 taking 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 Jose.Pinheiro@pharma.novartis.com and Douglas Bates
     bates@stat.wisc.edu

_S_e_e _A_l_s_o:

     'lmList', 'lm'

_E_x_a_m_p_l_e_s:

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

