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- _P_a_r_a_m_e_t_r_i_c _S_u_r_v_i_v_a_l _M_o_d_e_l _O_b_j_e_c_t _T_h_i_s _c_l_a_s_s _o_f _o_b_j_e_c_t_s _i_s
- _r_e_t_u_r_n_e_d _b_y _t_h_e _s_u_r_v_r_e_g _f_u_n_c_t_i_o_n _t_o _r_e_p_r_e_s_e_n_t _a _f_i_t_t_e_d
- _p_a_r_a_m_e_t_r_i_c _s_u_r_v_i_v_a_l _m_o_d_e_l. _C_l_a_s_s _s_u_r_v_r_e_g _i_n_h_e_r_i_t_s _f_r_o_m
- _c_l_a_s_s _g_l_m, _s_i_n_c_e _i_t _i_s _f_i_t _b_y _i_t_e_r_a_t_i_v_e _r_e_w_e_i_g_h_t_e_d _l_e_a_s_t
- _s_q_u_a_r_e_s; _t_h_e _o_b_j_e_c_t _r_e_t_u_r_n_e_d _h_a_s _a_l_l _t_h_e _c_o_m_p_o_n_e_n_t_s _o_f _a
- _w_e_i_g_h_t_e_d _l_e_a_s_t _s_q_u_a_r_e_s _o_b_j_e_c_t. _O_b_j_e_c_t_s _o_f _t_h_i_s _c_l_a_s_s _h_a_v_e
- _m_e_t_h_o_d_s _f_o_r _t_h_e _f_u_n_c_t_i_o_n_s _p_r_i_n_t, _s_u_m_m_a_r_y, _p_r_e_d_i_c_t, _a_n_d
- '_r_e_s_i_d_u_a_l_s'.
-
- The following components must be included in a legiti-
- mate survreg object. The residuals, fitted values,
- coefficients and effects should be extracted by the
- generic functions of the same name, rather than by the
- " operator.
-
- _A_r_g_u_m_e_n_t_s:
-
- coefficients:
- the coefficients of the linear.predictors, which multi-
- ply the columns of the model matrix. It does not
- include the estimate of error (sigma). The names of
- the coefficients are the names of the single-degree-
- of-freedom effects (the columns of the model matrix).
- If the model is over-determined there will be missing
- values in the coefficients corresponding to inestimable
- coefficients.
-
- parms:
- the parameters of the model that are not coefficients
- of the X matrix. The first of these will always be
- log(sigma).
-
- fixed:
- a vector of the same length as parms, where 1 indicates
- a parameter that was fixed at its starting value and
- was not part of the iteration.
-
- deviance:
- minus twice the difference between the maximized log-
- likelihood under the fitted model and a saturated
- model. Similar to the residual sum of squares.
-
- loglik:
- the log-likelihood for the final model.
-
- null.deviance:
- the deviance corresponding to the model with only an
- itercept term, and with parms fixed at their final
- values.
-
- dresiduals:
- the deviance residuals.
-
- var:
- the final variance matrix, including both coefficients
- and free parameters.
-
- family:
- a 2 element character vector giving the name of the
- family and the link; mainly for printing purposes. The
- object will also have the components of an glm object:
- linear predictors, fitted.values, residuals, effects,
- R, rank, assign, contrasts, weights, iter, residuals,
- fitted.values, call, terms and formula. See
- glm.object.
-
- survreg, glm.object, lm.object.
-
-