periodogram               package:pgam               R Documentation

_R_a_w _P_e_r_i_o_d_o_g_r_a_m

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

     A raw periodogram is returned and optionally plotted.

_U_s_a_g_e:

     periodogram(y, rows = trunc(length(na.omit(y))/2-1), plot = TRUE, ...)

_A_r_g_u_m_e_n_t_s:

       y: time series

    rows: number of rows to be returned. Default and largest is n/2-1,
          where n is the number of valid observations of the time
          series y

    plot: if 'TRUE' a raw periodogram is plotted

     ...: further arguments to 'plot' function

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

     The raw periodogram is an estimator of the spectrum of a time
     series, it still is a good indicator of unresolved seasonality
     patterns in residuals of the fitted model. See 'intensity' for
     frequencies extraction.

     This function plots a fancy periodogram where the intensities of
     the angular frequencies are plotted resembling tiny lollipops.

_V_a_l_u_e:

     Periodogram ordered by intensity.

_A_u_t_h_o_r(_s):

     Washington Leite Junger wjunger@ims.uerj.br and Antonio Ponce de
     Leon ponce@ims.uerj.br

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

     Box, G., Jenkins, G., Reinsel, G. (1994) Time Series Analysis :
     Forecasting and Control. 3rd edition, Prentice Hall, New Jersey.

     Diggle, P. J. (1989) Time Series : A Biostatistical Introduction.
     Oxford University Press, Oxford.

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

     'pgam', 'intensity'

