

pergram(growth)                              R Documentation

_C_a_l_c_u_l_a_t_e _a_n_d _p_l_o_t _a _p_e_r_i_o_d_o_g_r_a_m

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

     `pergram' calculates the values of a periodogram,
     `plot.pergram' plots it, and `plot.cum.pergram' plots
     the corresponding cumulative periodogram.

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

     pergram(y)
     plot.pergram(y, add=F, lty=1, xlab="Frequency", ylab="Periodogram",
             main="Periodogram", ylim=c(0,max(po[,2])))
     plot.cum.pergram(y, xlab="Frequency", ylab="Periodogram",
             main="Cumulative periodogram",
             ylim=c(0,max(cpo+1.358/(a+0.12+0.11/a))))

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

       y: A time series vector.

     add: If TRUE, adds a new periodogram to an existing
          plot.

  others: Graphics parameters

_V_a_l_u_e_:

     `pergram' prints and returns a two-column matrix of
     class, `pergram', containing the periodogram.

_A_u_t_h_o_r_(_s_)_:

     J.K. Lindsey

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

     y <- rnorm(100)
     print(z <- pergram(y))
     plot(z)
     plot.cum(z)

