exAM               package:robustbase               R Documentation

_E_x_a_m_p_l_e _D_a_t_a _o_f _A_n_t_i_l_l_e _a_n_d _M_a_y - _f_o_r _S_i_m_p_l_e _R_e_g_r_e_s_s_i_o_n

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

     This is an artificial data set, cleverly construced and used by
     Antille and May to demonstrate 'problems' with LMS and LTS.

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

     data(exAM)

_F_o_r_m_a_t:

     A data frame with 12 observations on 2 variables, 'x' and 'y'.

_D_e_t_a_i_l_s:

     Because the points are not in general position, both LMS and LTS
     typically _fail_; however, e.g., 'rlm(*, method="MM")' "works".

_S_o_u_r_c_e:

     Antille, G. and {El May}, H. (1992) The use of slices in the {LMS}
     and the method of density slices: Foundation and comparison.
      In Yadolah Dodge and Joe Whittaker, editors, _COMPSTAT: Proc.
     10th Symp. Computat. Statist., Neuchatel_, *1*, 441-445;
     Physica-Verlag.

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

     data(exAM)
     plot(exAM)
     summary(ls <- lm(y ~ x, data=exAM))
     abline(ls)

