crita                 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%
     pointwise 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(fit, cov=0.95)

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

     fit: 'locfit' object.

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

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

_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")

