R: Wrapper to give normalized spectrum

oceSpectrum {oce}

R Documentation

Wrapper to give normalized spectrum

Description

This is a wrapper around the R spectrum function, which returns spectral values that are adjusted so that the integral of those values equals the variance of the input x.

Usage

oceSpectrum(x, ...)

Arguments

`x`	As for `spectrum`, a univariate or multivariate time series.
`...`	extra arguments passed on to `spectrum`.

Value

A spectrum that has values that integrate to the variance.

Author(s)

Dan Kelley

Examples

  x <- rnorm(1e3)
  s <- spectrum(x, plot=FALSE)
  ss <- oce.spectrum(x, plot=FALSE)
  cat("variance of x=", var(x), "\n")
  cat("integral of     spectrum=", sum(s$spec)*diff(s$freq[1:2]), "\n")
  cat("integral of oce.spectrum=", sum(ss$spec)*diff(ss$freq[1:2]), "\n")

[Package oce version 1.0-1 Index]