rbacon: accrate.age – R documentation

Become an expert in R — Interactive courses, Cheat Sheets, certificates and more!

accrate.age

Obtain estimated accumulation rates for any age of a core.

Description

Obtain accumulation rates (in years per cm, so actually sedimentation times) as estimated by the MCMC iterations for any age of a core.

Usage

accrate.age(
  age,
  set = get("info"),
  cmyr = FALSE,
  ages = c(),
  BCAD = set$BCAD,
  silent = TRUE
)

Arguments

`age`	The age for which the accumulation rates need to be returned.
`set`	Detailed information of the current run, stored within this session's memory as variable `info`.
`cmyr`	Accumulation rates can be calculated in cm/year or year/cm. By default `cmyr=FALSE` and accumulation rates are calculated in year per cm.
`ages`	The ages of the age-depth model. Not provided by default, but can be provided to speed things up if the function is called repeatedly
`BCAD`	The calendar scale of graphs and age output-files is in `cal BP` by default, but can be changed to BC/AD using `BCAD=TRUE`.
`silent`	Warn when ages are outside the core's range. Default `silent=TRUE`.

Details

Considering accumulation rates is crucial for age-depth modelling, and even more so if they are subsequently used for calculating proxy influx values, or interpreted as proxy for environmental change such as carbon accumulation. See also accrate.age.ghost, accrate.depth and accrate.depth.ghost. Bacon deals explicitly with accumulation rate and its variability through defining prior distributions. This function obtains accumulation rates (in years per cm, so actually sedimentation times) as estimated by the MCMC iterations for any age of a core. Deals with only 1 age at a time. See also accrate.depth.

Value

all MCMC estimates of accumulation rate of the chosen age.

Author(s)

Maarten Blaauw, J. Andres Christen

Examples

## Not run: 
  Bacon(run=FALSE, coredir=tempfile())
  agedepth(yr.res=50, d.res=50, d.by=10)
  accrate.a5000 = accrate.age(5000)
  plot(accrate.a5000, pch='.')
  hist(accrate.a5000)

## End(Not run)

rbacon

Age-Depth Modelling using Bayesian Statistics

v2.5.5

GPL (>= 2)

Authors

Maarten Blaauw [aut, cre], J. Andres Christen [aut, ctb, cph], Marco A. Aquino Lopez [aut], Judith Esquivel Vazquez [ctb], Oscar M. Gonzalez V. [ctb], Ted Belding [cph], James Theiler [cph], Brian Gough [cph], Charles Karney [cph]

Initial release

2021-05-04