Apply a constant sedimentation rate model to transform a spatial series to temporal series
Multitaper Method Spectral Analysis with Power Law (1/f) fit
Prewhiten stratigraphic series with autoregressive filter, order selected by Akaike Information Criterion
Evolutive Harmonic Analysis & Evolutive Power Spectral Analysis
Ar/Ar Geochronology: Generate an Ar/Ar age spectrum and calculate step-heating plateau age.
Adjust spectrum confidence levels for multiple comparisons
Generate eccentricity-tilt-precession models
'Dynamic window' moving average, median and variance of stratigraphic series
Example stratigraphic model series
Arcsine transformation of stratigraphic series
Create non-linear response by clipping stratigraphic series
Prewhiten stratigraphic series with AR1 filter, using 'standard' or unbiased estimate of rho
Read data matrix from file
Calculate all possible difference and combinations tones
Replace values < 0 with 0
Monte Carlo simulation for TimeOpt
Summary statistics for stratigraphic series
Determine 'dynamic moving window' for stratigraphic series, adjusting for changing sample density to maintain a window of constant duration
Download file from astrochron data server
Generate noise surrogates from a theoretical power spectrum
Track ASM null hypothesis significance level minima in eASM results
Dynamically explore cross-plot, zoom-in into specified region
Apply Hann taper to stratigraphic series
Mann and Lees (1996) robust red noise MTM analysis
Isolate data from a specified stratigraphic interval
Multitaper method spectral analysis
Intermediate spectrum test of Thomson et al. (2001)
Calculate eccentricity and precession periods in ka, given g and k in arcsec/yr
Set default plotting parameters for vertical stratigraphic plots
Identify optimal spatial/temporal shift to maximize correlation between two stratigraphic series.
TimeOptMCMC: Evaluation of eccentricity-related amplitude modulation and bundling
in paleoclimate data ("TimeOpt"), with uncertainties via Markov-Chain Monte Carlo
Simple periodogram
Interactively identify points in plot
Apply cosine taper to stratigraphic series
Hilbert transform of stratigraphic series
Apply DPSS taper to stratigraphic series
Identify maxima of peaks in series, filter at desired threshold value
Tune stratigraphic series to an astronomical target using graphical interface
Astrochronologic testing via the amplitude modulation approach of Zeeden et al. (2015).
Apply 'ramping' sedimentation rate model to convert time to stratigraphy
Pad stratigraphic series with zeros
Combine multiple vectors
Piecewise linear interpolation of stratigraphic series
Divide by linear trend in stratigraphic series
Extract record from EHA time-frequency output or eAsm output
Remove outliers from stratigraphic series
Replace values <= 0 with smallest positive value
Adjust spectral p-values for multiple comparisons
Set up plots
Lowpass filter stratigraphic series
Flip stratigraphic series
Create color time-frequency plots from eha results.
Generate cross-plot with kernel density estimates on axes
Remove missing entries, sort data, average duplicates
Remove outliers from stratigraphic series
Resample stratigraphic series
TimeOpt: Evaluation of eccentricity-related amplitude modulation and bundling in paleoclimate data
Write CSV file
Determine the total power within a given bandwidth
Convert record of local spatial frequency (from EHA) to sedimentation rate curve
Write tab-delimited file
Apply Gaussian taper to stratigraphic series
Log transformation of stratigraphic series
Identify minima of troughs in series, filter at desired threshold value
Remove stratigraphic levels that contain one or more NAs
Generate power law (1/f) noise surrogates
Robust Locally-Weighted Regression Spectral Background Estimation
A tool to interactively trace peak trajectories on plots
Frequency-domain minimal tuning: Use interactive graphical interface to trace frequency drift
Apply Taner bandpass or lowpass filter to stratigraphic series
Create lithofacies rank series from bed thickness data
Ar/Ar Geochronology: calculate weighted mean age, age uncertainty, and other associated statistics/plots (with interactive graphics for data culling).
Calculate moving window correlation coefficient for two stratigraphic series, using a 'dynamic window'
Standardize variable in stratigraphic series
Read data from file
TimeOptPlot: Generate summary figure for TimeOpt analyses
Remove Gaussian kernel smoother from stratigraphic series
Evaluate power spectrum false positive rates via Monte Carlo simulation
Tune stratigraphic series
Fit and remove Lowess smoother from stratigraphic series
Estimate power law (1/f) fit to power spectrum
Integrate sedimentation rate curve to obtain time-space map
Estimate correlation coefficient and significance for serially correlated data
Generate phase-randomized surrogate series as in Ebisuzaki (1997)
Frequency-domain minimal tuning: Use interactive graphical interface and sorting to track frequency drift
A tool to interactively select points to track peak trajectories on plots
AR(1) + ETP simulation routine
Automatically plot multiple stratigraphic series, with smoothing if desired
Anchor a floating astrochronology to a radioisotopic age
Obliquity and precession periods of Berger et al. (1992)
Generate AR(1) surrogates
Remove mean value from stratigraphic series
Average Spectral Misfit
Bandpass filter stratigraphic series
Generate autoregressive moving-average model
astrochron: A Computational Tool for Astrochronology
Interactively delete points in plot
Generate harmonic model
Subtract linear trend from stratigraphic series
List column numbers for each variable
Query R for color information
Evolutive Average Spectral Misfit
eTimeOpt: Evolutive implementation of TimeOpt (Meyers, 2015)
Track eTimeOpt r2 maxima
Download Laskar et al. (2004, 2011a, 2011b) astronomical solutions