

phones {base}                                R Documentation

_T_h_e _W_o_r_l_d_'_s _T_e_l_e_p_h_o_n_e_s

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

     The number of telephones in various regions of the
     world (in thousands).

_U_s_a_g_e_:

     data(phones)

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

     A matrix with 7 rows and 8 columns.

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

     The columns of the matrix give the figures for a given
     region, and the rows the figures for a year.

     The regions are: North America, Europe, Asia, South
     America, Oceania, Africa, Central America.

     The years are: 1951, 1956, 1957, 1958, 1959, 1960,
     1961.

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

     AT&T (1961).  The World's Telephones.

_R_e_f_e_r_e_n_c_e_s_:

     McNeil, D. R. (1977).  Interactive Data Analysis.  New
     York: Wiley.

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

     data(phones)
     matplot(rownames(phones), phones, type = "b", log = "y",
             xlab = "Year", ylab = "Number of telephones (1000's)")
     legend(1951.5, 80000, colnames(phones), col = 1:7, lty = 1:7, pch = rep(21, 7))
     title(main = "phones data: log scale for response")

