astrochron: A Computational Tool for Astrochronology

Routines for astrochronologic testing, astronomical time scale construction, and time series analysis. Also included are a range of statistical analysis and modeling routines that are relevant to time scale development and paleoclimate analysis.

Install the latest version of this package by entering the following in R:
AuthorStephen Meyers
Date of publication2017-03-20 10:51:32 UTC
MaintainerStephen Meyers <>

View on CRAN

Man pages

anchorTime: Anchor a floating astrochronology to a radioisotopic age

ar1: Generate AR(1) surrogates

ar1etp: AR(1) + ETP simulation Routine

arcsinT: Arcsine Transformation of Stratigraphic Series

armaGen: Generate Autoregressive Moving-average Model

asm: Average Spectral Misfit

astrochron-package: astrochron: A Computational Tool for Astrochronology

autoPlot: Automatically plot multiple stratigraphic series, with...

bandpass: Bandpass Filter Stratigraphic Series

bergerPeriods: Obliquity and Precession Periods of Berger et al. (1992)

cb: Combine Multiple Vectors

clipIt: Create non-linear response by clipping stratigraphic series

constantSedrate: Apply a constant sedimentation rate model to transform a...

cosTaper: Apply Cosine Taper to Stratigraphic Series

cycles: Generate Harmonic Model

delPts: Interactively Delete Points in Plot

demean: Remove Mean Value from Stratigraphic Series

detrend: Subtract Linear Trend from Stratigraphic Series

divTrend: Divide by Linear Trend in Stratigraphic Series

dpssTaper: Apply DPSS Taper to Stratigraphic Series

eAsm: Evolutive Average Spectral Misfit

eAsmTrack: Track ASM Null Hypothesis significance level minima in eASM...

eha: Evolutive Harmonic Analysis

etp: Generate Eccentricity-Tilt-Precession Models

extract: Extract record from EHA time-frequency output or eAsm output

flip: Flip stratigraphic series

freq2sedrate: Convert record of local spatial frequency (from EHA) to...

gausTaper: Apply Gaussian Taper to Stratigraphic Series

getColor: Query R for color information

getData: Download file from astrochron data server

getLaskar: Download Laskar et al. (2004, 2011a, 2011b) astronomical...

hannTaper: Apply Hann Taper to Stratigraphic Series

headn: List Column Numbers for Each Variable

hilbert: Hilbert Transform of Stratigraphic Series

idPts: Interactively Identify Points in Plot

integratePower: Determine the total power within a given bandwidth

iso: Isolate Data from a Specified Stratigraphic Interval

linage: Tune stratigraphic series to an astronomical target using...

linterp: Piecewise Linear Interpolation of Stratigraphic Series

logT: Log Transformation of Stratigraphic Series

lowpass: Lowpass Filter Stratigraphic Series

lowspec: Robust Locally-Weighted Regression Spectral Background...

modelA: Example stratigraphic model series

mtm: Multitaper Method Spectral Analysis

mtmAR: Intermediate spectrum test of Thomson et al. (2001)

mtmML96: Mann and Lees (1996) robust red noise MTM analysis

noKernel: Remove Gaussian Kernel Smoother from Stratigraphic Series

noLow: Fit and Remove Lowess Smoother from Stratigraphic Series

pad: Pad Stratigraphic Series with Zeros

peak: Identify maxima of peaks in series, filter at desired...

periodogram: Simple Periodogram

pl: Set Up Plots

plotEha: Create color time-frequency plots from eha results. Also a...

plS: Set default plotting parameters for vertical stratigraphic...

prewhiteAR: Prewhiten Stratigraphic Series with Autoregressive Filter,...

prewhiteAR1: Prewhiten Stratigraphic Series with AR1 filter, using...

rankSeries: Create lithofacies rank series from bed thickness data

read: Read Data from File

readMatrix: Read Data Matrix from File

repl0: Replace Values < 0 with 0

replEps: Replace Values <= 0 with Smallest Positive Value

resample: Resample Stratigraphic Series

rmNA: Remove stratigraphic levels that contain one or more NAs

s: Standardize variable in Stratigraphic Series

sedRamp: Apply 'ramping' sedimentation rate model to convert time to...

sedrate2time: Integrate sedimentation rate curve to obtain time-space map

sortNave: Remove Missing Entries, Sort Data, Average Duplicates

stepHeat: Ar/Ar Geochronology: Generate an Ar/Ar age spectrum and...

strats: Summary Statistics for Stratigraphic Series

surrogateCor: Estimate correlation coefficient and significance for...

surrogates: Generate phase-randomized surrogate series as in Ebisuzaki...

taner: Apply Taner Bandpass or Lowpass Filter to Stratigraphic...

testPrecession: Astrochronologic testing via the amplitude modulation...

timeOpt: TimeOpt: Evaluation of eccentricity-related amplitude...

timeOptSim: Monte Carlo Simulation for TimeOpt

tones: Calculate all possible difference and combinations tones

traceFreq: Frequency-domain minimal tuning: Use interactive graphical...

trackFreq: Frequency-domain minimal tuning: Use interactive graphical...

trim: Remove Outliers from Stratigraphic Series

trimAT: Remove Outliers from Stratigraphic Series

trough: Identify minima of troughs in series, filter at desired...

tune: Tune Stratigraphic Series

writeCSV: Write CSV File

writeT: Write Tab-delimited File

wtMean: Ar/Ar Geochronology: calculate weighted mean age, age...

xplot: Generate Cross-plot with Density Estimates on Axes

zoomIn: Dynamically explore cross-plot, zoom-in into specified region


anchorTime Man page
ar1 Man page
ar1etp Man page
arcsinT Man page
armaGen Man page
asm Man page
astrochron Man page
astrochron-package Man page
autoPlot Man page
bandpass Man page
bergerPeriods Man page
cb Man page
clipIt Man page
constantSedrate Man page
cosTaper Man page
cycles Man page
delPts Man page
demean Man page
detrend Man page
divTrend Man page
dpssTaper Man page
eAsm Man page
eAsmTrack Man page
eha Man page
etp Man page
extract Man page
flip Man page
freq2sedrate Man page
gausTaper Man page
getColor Man page
getData Man page
getLaskar Man page
hannTaper Man page
headn Man page
hilbert Man page
idPts Man page
integratePower Man page
iso Man page
linage Man page
linterp Man page
logT Man page
lowpass Man page
lowspec Man page
modelA Man page
mtm Man page
mtmAR Man page
mtmML96 Man page
noKernel Man page
noLow Man page
pad Man page
peak Man page
periodogram Man page
pl Man page
plotEha Man page
plS Man page
prewhiteAR Man page
prewhiteAR1 Man page
rankSeries Man page
read Man page
readMatrix Man page
repl0 Man page
replEps Man page
resample Man page
rmNA Man page
s Man page
sedRamp Man page
sedrate2time Man page
sortNave Man page
stepHeat Man page
strats Man page
surrogateCor Man page
surrogates Man page
taner Man page
testPrecession Man page
timeOpt Man page
timeOptSim Man page
tones Man page
traceFreq Man page
trackFreq Man page
trim Man page
trimAT Man page
trough Man page
tune Man page
writeCSV Man page
writeT Man page
wtMean Man page
xplot Man page
zoomIn Man page


R/FUNCTION-rankSeries_v3.R R/FUNCTION-hannTaper_v4.R R/FUNCTION-plotEha_v4.R R/FUNCTION-writeCSV_v3.R R/FUNCTION-ar1etp_v9.R R/FUNCTION-detrend_v3.R R/FUNCTION-clipIt_v2.R R/FUNCTION-extract_v5.R R/FUNCTION-cosTaper_v10.R R/FUNCTION-idPts_v10.R R/FUNCTION-eha_v21a.R R/FUNCTION-timeOpt_v8c.R R/FUNCTION-logT_v6.R R/FUNCTION-mtm_v18a.R R/FUNCTION-arcsinT_v6.R R/FUNCTION-surrogates_v2.R R/FUNCTION-etp_v7.R R/FUNCTION-resample_v5.R R/FUNCTION-freq2sedrate_v2.R R/FUNCTION-plS.R R/FUNCTION-prewhiteAR_v6.R R/FUNCTION-eAsmTrack_v2.R R/astrochron_pkg.R R/FUNCTION-s_v2.R R/FUNCTION-bergerPeriods_v3.R R/FUNCTION-ar1_v8.R R/FUNCTION-timeOptSim_v7c.R R/FUNCTION-getColor.R R/FUNCTION-anchorTime_v3.R R/FUNCTION-noLow_v5.R R/FUNCTION-pad_v3.R R/FUNCTION-cb_v3.R R/FUNCTION-taner_v7.R R/FUNCTION-cycles_v5.R R/FUNCTION-noKernel_v3.R R/FUNCTION-tones.R R/FUNCTION-wtMean_v13.R R/FUNCTION-writeT_v3.R R/FUNCTION-lowpass_v11.R R/FUNCTION-delPts_v6.R R/FUNCTION-rmNA_v2.R R/FUNCTION-constantSedrate_v3.R R/FUNCTION-tune_v7b.R R/FUNCTION-strats_v13.R R/FUNCTION-pl_v6.R R/FUNCTION-gausTaper_v9.R R/FUNCTION-repl0_v4.R R/FUNCTION-iso_v10.R R/FUNCTION-eAsm_v3.R R/FUNCTION-sedRamp_v3.R R/FUNCTION-read_v28a.R R/FUNCTION-flip.R R/FUNCTION-zoomIn_v2.R R/FUNCTION-peak_v6a.R R/FUNCTION-traceFreq_v6.R R/FUNCTION-armaGen_v5.R R/FUNCTION-mtmAR_v7.R R/FUNCTION-linage_v2.R R/FUNCTION-sortNave_v7a.R R/FUNCTION-dpssTaper_v4.R R/FUNCTION-stepHeat_v5.R R/FUNCTION-mtmML96_v14a.R R/FUNCTION-trough_v2a.R R/FUNCTION-headn_v3.R R/FUNCTION-bandpass_v14.R R/FUNCTION-replEps_v5.R R/FUNCTION-lowspec_v19a.R R/FUNCTION-integratePower_v9.R R/FUNCTION-readMatrix_v7.R R/FUNCTION-sedrate2time_v2.R R/FUNCTION-testPrecession_v4.R R/FUNCTION-demean_v3.R R/FUNCTION-prewhiteAR1_v5.R R/FUNCTION-periodogram_v13.R R/FUNCTION-trim_v5.R R/FUNCTION-surrogateCor_v6e.R R/FUNCTION-asm_v10b.R R/FUNCTION-trimAT_v4.R R/FUNCTION-linterp_v9.R R/FUNCTION-xplot_v4.R R/FUNCTION-divTrend_v4.R R/FUNCTION-autoPlot_v9.R R/FUNCTION-getData.R R/FUNCTION-hilbert_v15.R R/FUNCTION-trackFreq_v8.R R/FUNCTION-getLaskar_v3.R
man/repl0.Rd man/plotEha.Rd man/trimAT.Rd man/asm.Rd man/clipIt.Rd man/ar1.Rd man/delPts.Rd man/tune.Rd man/strats.Rd man/xplot.Rd man/sortNave.Rd man/surrogateCor.Rd man/modelA.Rd man/timeOpt.Rd man/traceFreq.Rd man/logT.Rd man/lowspec.Rd man/arcsinT.Rd man/timeOptSim.Rd man/cb.Rd man/eAsmTrack.Rd man/getLaskar.Rd man/pad.Rd man/demean.Rd man/stepHeat.Rd man/plS.Rd man/dpssTaper.Rd man/anchorTime.Rd man/ar1etp.Rd man/mtm.Rd man/mtmML96.Rd man/cycles.Rd man/etp.Rd man/readMatrix.Rd man/surrogates.Rd man/armaGen.Rd man/replEps.Rd man/hannTaper.Rd man/lowpass.Rd man/autoPlot.Rd man/testPrecession.Rd man/pl.Rd man/divTrend.Rd man/rankSeries.Rd man/resample.Rd man/sedrate2time.Rd man/integratePower.Rd man/writeT.Rd man/sedRamp.Rd man/detrend.Rd man/gausTaper.Rd man/headn.Rd man/taner.Rd man/idPts.Rd man/trough.Rd man/cosTaper.Rd man/eha.Rd man/wtMean.Rd man/writeCSV.Rd man/periodogram.Rd man/astrochron-package.Rd man/prewhiteAR1.Rd man/iso.Rd man/prewhiteAR.Rd man/bergerPeriods.Rd man/rmNA.Rd man/trim.Rd man/noLow.Rd man/read.Rd man/freq2sedrate.Rd man/noKernel.Rd man/getColor.Rd man/tones.Rd man/s.Rd man/mtmAR.Rd man/zoomIn.Rd man/trackFreq.Rd man/peak.Rd man/flip.Rd man/bandpass.Rd man/hilbert.Rd man/getData.Rd man/extract.Rd man/linage.Rd man/linterp.Rd man/constantSedrate.Rd man/eAsm.Rd

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