crit<-                package:locfit                R Documentation

_S_u_b_s_t_i_t_u_t_e _c_r_i_t_i_c_a_l _v_a_l_u_e_s _o_n "_l_o_c_f_i_t" _o_b_j_e_c_t.

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

     Every `"locfit"' object contains a critical value object to be
     used in computing and ploting confidence intervals. By default, a
     95 confidence level is used. To change the confidence level, the
     critical value object must be substituted using `crit' and
     `crit<-'.

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

     crit(fit) <- crit(cov=0.99)

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

     fit: `"locfit"' object. 

   value: Critical value object generated by `crit' or `kappa0'. 

_V_a_l_u_e:

     Critical value object.

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

     `locfit', `plot.locfit', `kappa0', `crit'.

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

     # compute and plot 99% confidence intervals, with local variance estimate.
     data(ethanol)
     fit <- locfit(NOx~E,data=ethanol)
     crit(fit) <- crit(fit,cov=0.99)
     plot(fit,band="local")

     # compute and plot 99% simultaneous bands
     crit(fit) <- kappa0(NOx~E,data=ethanol,cov=0.99)
     plot(fit,band="local")

