spec_pgram

calculate the spectra and cross-spectra

spec_pgram(x, spans = NULL, kernel = NULL, taper = 0.1, pad = 0,
  fast = TRUE, demean = FALSE, detrend = TRUE, plot = TRUE,
  na.action = na.fail, ...)

Arguments

x

univariate or multivariate time series.
spans

vector of odd integers giving the widths of modified Daniell smoothers to be used to smooth the periodogram.
kernel

alternatively, a kernel smoother of class "tskernel".
taper

specifies the proportion of data to taper. A split cosine bell taper is applied to this proportion of the data at the beginning and end of the series.
pad

proportion of data to pad. Zeros are added to the end of the series to increase its length by the proportion pad.
fast

logical; if TRUE, pad the series to a highly composite length.
demean

logical. If TRUE, subtract the mean of the series.
detrend

logical. If TRUE, remove a linear trend from the series. This will also remove the mean.
plot

plot the periodogram?
na.action

NA action function.
...

graphical arguments passed to plot.spec.

Value

array of spectra