

vcov(MASS)                                   R Documentation

_C_a_l_c_u_l_a_t_e _V_a_r_i_a_n_c_e_-_C_o_v_a_r_i_a_n_c_e _M_a_t_r_i_x _f_o_r _a _F_i_t_t_e_d _M_o_d_e_l
_O_b_j_e_c_t

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

     Returns the variance-covariance matrix.  This is a
     generic function.  Functions with names beginning in
     `vcov.' will be methods for this function.  `lm',
     `glm', `nls'.

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

     vcov(x, ...)

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

       x: a fitted model object.

     ...: additional arguments for method functions.

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

     a matrix of the estimated covariances between the
     parameter estimates in the linear or non-linear predic-
     tor of the model.

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

     `vcov.nlregb'

