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.


News

astrochron v0.9 (Release date: 2019-01-08)

New functions:

  • diffAccum
  • imbrie
  • synthStrat
  • testTilt
  • timeOptTemplate
  • timeOptTemplateSim

Other changes:

  • function getLaskar: added 65 deg. North insolation, summer solstice
  • function tune: added new warning message when control has only one line
  • function getData: added data sets 607-18O, AEB-18O, Newark-rank, CDL-rank, DVCP2017-18O
  • function testPrecession: significance testing algorithm updated
  • function read: added verbose option
  • function multiTest: added output option
  • function mtmPL: corrected for round-off error on default flow estimation
  • function detrend: added option to output linear trend
  • function sortNave: if averaging is performed, original data points are plotted for comparison.
  • function read: if averaging is performed, original data points are plotted for comparison.
  • function mtm: added option to allow log frequency plotting (option pl).
  • function mtmML96: added option to allow log frequency plotting (option pl).
  • function lowspec: added option to allow log frequency plotting (option pl).
  • function mtmPL: added option to allow log frequency plotting (option pl), fixed default flow issue.
  • function ar1etp: updated plots (option pl), and added option to exclusively evaluate noise (wtAR<0)
  • help pages for taner, bandpass, and lowpass now demonstrate notch filter and highpass filtering.

astrochron v0.8 (Release date: 2018-05-16)

New functions:

  • calcPeriods
  • confAdjust
  • eTimeOpt
  • eTimeOptTrack
  • makeNoise
  • mtmPL
  • multiTest
  • pwrLaw
  • pwrLawFit
  • testBackground
  • timeOptMCMC
  • tracePeak
  • trackPeak

Other changes:

  • function getData: new data added: "graptolite" and "Xiamaling-CuAl".
  • function lowspec: when output=2, order has been changed to match other mtm-based functions.
  • function lowspec: Harmonic_F-test_CL renamed Harmonic_CL
  • function periodogram: replaced ar1 option with background, allowing ar1 or pwrLaw fit.
  • function timeOpt: new option fitModPwr
  • function timeOptSim: implementation of new p-value estimation procedure.
  • function timeOptSim: the function is now parallelized.
  • function timeOptSim: when output=2, now only one column is output, containing r2opt results from all simulations.
  • function timeOptSim: order of options on function call has been changed.
  • check option added to functions linterp, sedrate2time, taner, tune, read, readMatrix, hilbert, timeOpt

Reference manual

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install.packages("astrochron")

0.9 by Stephen Meyers, 3 months ago


Browse source code at https://github.com/cran/astrochron


Authors: Stephen Meyers [aut,cre] , Alberto Malinverno [ctb] , Linda Hinnov [ctb] , Christian Zeeden [ctb] , Vincent Moron [ctb]


Documentation:   PDF Manual  


Task views: Chemometrics and Computational Physics


GPL-3 license


Imports multitaper, IDPmisc, fields, doParallel, parallel, iterators, foreach


Suggested by StratigrapheR, multitaper.


See at CRAN