

sunspot {ts}                                 R Documentation

_Y_e_a_r_l_y _S_u_n_s_p_o_t _D_a_t_a_, _1_7_0_0_-_-_1_9_8_8_.  _M_o_n_t_h_l_y _S_u_n_s_p_o_t _D_a_t_a_,
_1_7_4_9_-_-_1_9_9_7_.

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

     Monthly and yearly number of sunspots.

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

     data(sunspot)

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

     The univariate time series `sunspot.year' and
     `sunspot.month' contain 289 and 2988 observations,
     respectively.  The objects are of class `"ts"'.

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

     Monthly data: Sunspot Index Data Center, World Data
     Center-C1 For Sunspot Index Royal Observatory of Bel-
     gium, Av. Circulaire, 3, B-1180 BRUSSELS <URL:
     http://www.oma.be/KSB-ORB/SIDC/sidc_txt.html>

     Yearly data: H. Tong (1996) Non-Linear Time Series.
     Clarendon Press, Oxford, p. 471.

_S_e_e _A_l_s_o_:

     `sunspot.month' is a longer version of `sunspots' in
     base R, that runs until 1988.

