paleodata_varfromspec: Variance computation by integration of the spectrum, based on...

In paleovar/ptboxproxytools: PTBox proxy tools for time series processing and analysis

Variance computation by integration of the spectrum, based on PaleoSpec::GetVarFromSpectra()

Description

Variance computation by integration of the spectrum, based on PaleoSpec::GetVarFromSpectra()

Usage

paleodata_varfromspec(
  xin,
  freq.start = NULL,
  freq.end = NULL,
  target = "raw",
  interpolation = TRUE,
  interpolation_type = "spectral",
  interpolation_dates = NULL,
  transformation = FALSE,
  transformation_type = "normalize",
  detrend = TRUE,
  df_log = 0.05,
  bLog = FALSE
)

Arguments

xin	Proxytibble with proxy data in 'zoo::zoo' format, or irregular time series object ('zoo::zoo'), xin can be multivariate
freq.start	Vector containing the start frequencies of the fitting interval(s)
freq.end	Vector containing the start frequencies of the fitting interval(s)
target	denotes "raw" or "logsmooth", default "raw"
interpolation	Logical: should interpolation be applied?
interpolation_type	Parameters for interpolation (see paleodata_interpolation)
interpolation_dates	Parameters for interpolation (see paleodata_interpolation). If NULL the interpolation is set to the mean temporal resolution of each proxy time series.
transformation	Logical: should transformation be applied?
transformation_type	Parameters for transformation (see paleodata_transformation)
detrend	Logical: should time series be linearly detrend before computing the spectrum
df_log	Width of the log-smoother in log units
bLog	TRUE: average in the log space of the power, FALSE: arithmetic average

Value

List with estimated variance

See Also

GetVarFromSpectra (from 'PaleoSpec') for regular time series version

paleodata_spectrum (from 'PTBoxProxytools') for computation of spectra

Examples

# Load ice core example data
library(PTBoxProxydata)
mng <- ProxyDataManager()
icecoredata <- load_set(mng,'icecore_testset',zoo_format = 'zoo')
# compute variance
testout <- icecoredata %>% paleodata_varfromspec(.,  target="raw", freq.start = 5e-5, freq.end = 5e-4)
print(testout)

paleovar/ptboxproxytools documentation built on June 9, 2025, 1:40 a.m.