eTimeOptTrack: Track eTimeOpt r2 maxima

In astrochron: A Computational Tool for Astrochronology

Track eTimeOpt r2 maxima

Description

Track eTimeOpt r2 maxima.

Usage

eTimeOptTrack(res,threshold=0,ydir=-1,genplot=T,verbose=T)

Arguments

res	eTimeOpt r2 results. Must have the following format: column 1=sedimentation rate; remaining columns (2 to n)=r2; titles for columns 2 to n must be the location (depth or height). Note that this format is ouput by function eTimeOpt.
threshold	Threshold r2-value for analysis and plotting.
ydir	Direction for y-axis in plots (depth or height). -1 = values increase downwards (slower plotting!), 1 = values increase upwards.
genplot	Generate summary plots? (T or F)
verbose	Verbose output? (T or F)

Details

Please see function eTimeOpt for details.

References

S.R. Meyers, 2015, The evaluation of eccentricity-related amplitude modulations and bundling in paleoclimate data: An inverse approach for astrochronologic testing and time scale optimization: Paleoceanography, v.30, 1625-1640.

S.R. Meyers, 2019, Cyclostratigraphy and the problem of astrochronologic testing: Earth-Science Reviews v.190, 190-223.

See Also

timeOpt, and eTimeOpt

Examples

## Not run: 
# generate a test signal with precession and eccentricity
ex=cycles(freqs=c(1/405.6795,1/130.719,1/123.839,1/98.86307,1/94.87666,1/23.62069, 
1/22.31868,1/19.06768,1/18.91979),end=4000,dt=5)

# convert to meters with a linearly increasing sedimentation rate from 0.01 m/kyr to 0.03 m/kyr
ex=sedRamp(ex,srstart=0.01,srend=0.03)

# interpolate to median sampling interval
ex=linterp(ex)

# evaluate precession & eccentricity power, and precession modulations
res=eTimeOpt(ex,win=20,step=1,fit=1,output=1)

# extract the optimal fits for the power optimization
sedrates=eTimeOptTrack(res[2])

# extract the optimal fits for the envelope*power optimization
sedrates=eTimeOptTrack(res[3])

# you can also interactively track the results using functions 'trackPeak' and 'tracePeak'
#  evaluate the results from the power optimization
sedrates=trackPeak(res[2])
sedrates=tracePeak(res[2])

#  evaluate the results from the envelope*power optimization optimization
sedrates=trackPeak(res[3])
sedrates=tracePeak(res[3])

## End(Not run)

astrochron documentation built on Sept. 30, 2024, 9:14 a.m.