growth (version 1.1.2)

pergram: Calculate and Plot a Periodogram

Description

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

Usage

pergram(y)
# S3 method for pergram
plot(
  x,
  add = FALSE,
  lty = 1,
  xlab = "Frequency",
  ylab = "Periodogram",
  main = "Periodogram",
  ylim = c(0, max(po[, 2])),
  ...
)
# S3 method for pergram
plot_cum(
  x,
  xlab = "Frequency",
  ylab = "Periodogram",
  main = "Cumulative periodogram",
  ylim = c(0, max(cpo + 1.358/(a + 0.12 + 0.11/a))),
  ...
)

Value

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

Arguments

y

A time series vector.

x

Plotting parameters

add

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

lty

Plotting parameters

xlab

Plotting parameters

ylab

Plotting parameters

main

Plotting parameters

ylim

Plotting parameters

...

Plotting parameters

Methods (by generic)

• plot(pergram): Plot method

• plot_cum(pergram): Plot_cum method

Author

J.K. Lindsey

Examples

y <- rnorm(100)
print(z <- pergram(y))
plot(z)
plot_cum(z)