phones                 package: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.  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 = 1:6, lty = 1:5, pch = rep(21, 7))
     title(main = "phones data: log scale for response")

