Periodogram

Description

Computes the raw periodogram defined by,

I(f_j) = \frac{1}{n} | sum z[t] exp(2 π f_j) |^2

Usage

Periodogram(z)

Arguments

Details

The expected value of the periodogram equals the spectral density function.

Value

the periodogram

Author(s)

A. I. McLeod

See Also

artfimaSDF

Examples

data(sunspot.year)
Ip <- Periodogram(sunspot.year)
fr <- (1:length(Ip))/length(sunspot.year)
plot(fr, Ip, xlab="frequency", ylab="Periodogram")