Belgian-phones             package:MASS             R Documentation

_B_e_l_g_i_u_m _P_h_o_n_e _C_a_l_l_s _1_9_5_0-_1_9_7_3

_D_e_s_c_r_i_p_t_i_o_n:

     A list object with the annual numbers of telephone calls, in
     Belgium.  The components are:

     '_y_e_a_r' last two digits of the year.

     '_c_a_l_l_s' number of telephone calls made (in millions of calls).


_U_s_a_g_e:

     phones

_S_o_u_r_c_e:

     P. J. Rousseeuw and A. M. Leroy (1987) _Robust Regression &
     Outlier Detection._ Wiley.

_R_e_f_e_r_e_n_c_e_s:

     Venables, W. N. and Ripley, B. D. (2002) _Modern Applied
     Statistics with S._ Fourth edition.  Springer.