presidents             package:datasets             R Documentation

_Q_u_a_r_t_e_r_l_y _A_p_p_r_o_v_a_l _R_a_t_i_n_g_s _o_f _U_S _P_r_e_s_i_d_e_n_t_s

_D_e_s_c_r_i_p_t_i_o_n:

     The (approximately) quarterly approval rating for the President of
     the United states from the first quarter of 1945 to the last
     quarter of 1974.

_U_s_a_g_e:

     presidents

_F_o_r_m_a_t:

     A time series of 120 values.

_D_e_t_a_i_l_s:

     The data are actually a fudged version of the approval ratings. 
     See McNeil's book for details.

_S_o_u_r_c_e:

     The Gallup Organisation.

_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:

     require(stats); require(graphics)
     plot(presidents, las = 1, ylab = "Approval rating (%)",
          main = "presidents data")