student.t: Comparison dates calibrated using both the student-t...
In GPawi/clamsy: Classical Age-Depth Modelling of Cores from Deposits

Description Usage Arguments Details Author(s) Examples

Visualise how a date calibrates using the student-t distribution and the the normal distribution.

student.t(
  y = 2450,
  error = 50,
  t.a = 3,
  t.b = 4,
  cc = 1,
  postbomb = NULL,
  cc1 = "IntCal13",
  cc2 = "Marine13",
  cc3 = "SHCal13",
  cc4 = "mixed",
  ccdir = "",
  Cutoff = 1e-05,
  times = 8
)

`y`	The reported mean of the date.
`error`	The reported error of the date.
`t.a`	Value for the student-t parameter `a`.
`t.b`	Value for the student-t parameter `b`.
`cc`	calibration curve for C14 dates (1, 2 or 3).
`postbomb`	Which postbomb curve to use for negative 14C dates
`cc1`	For northern hemisphere terrestrial C14 dates.
`cc2`	For marine C14 dates.
`cc3`	For southern hemisphere C14 dates.
`cc4`	A custom calibration curve
`ccdir`	Directory where the calibration curves for C14 dates `cc` are allocated. By default `ccdir=""`. Use `ccdir="."` to choose current working directory. Use `ccdir="Curves/"` to choose sub-folder `Curves/`.
`Cutoff`	Threshold above which calibrated probabilities are plotted
`times`	8 by default.

Radiocarbon and other dates are usually modelled using the normal distribution (red curve). The student-t approach (grey distribution) however allows for wider tails and thus tends to better accommodate outlying dates. This distribution requires two parameters, called 'a' and 'b'.

Maarten Blaauw