standard: define an isotopic reference standards

In pvermees/simplex: Data Reduction Software for Secondary Ion Mass Spectrometry

define an isotopic reference standards

Description

specify the isotopic composition of a reference material for SIMS data calibration.

Usage

standard(preset, tst, measured, del, ref)

Arguments

preset	(optional) text string. One of either U-Pb age standards: 'Plesovice-t', Qinghu-t, Penglai-t, '44069-t', 'Temora-t', O-isotope standards: 'Plesovice-O', 'NBS28-O', 'Qinghu-O', 'Penglai-O', or S-isotope standards: 'Sonora-S'.
tst	two element with the standard's age and its standard error.
measured	logical. Only relevant for geochronological data. If TRUE, stores the composition of the standard as a measured isotopic composition. If FALSE, stores the composition as a mixture of common Pb and radiogenic Pb.
del	Stable isotope composition of a standard in conventional delta notation, specified as a two-item list containing a vector val of \delta-values and its covariance matrix cov.
ref	Logratio composition of a reference standard such as Vienna Standard Mean Ocean Water (VSMOW) or troilite. A two-item list containing a vector val of logratio-values and its covariance matrix cov.

Value

an object of class standard

Examples

data(Cameca_UPb,package="simplex")
st <- standard(preset="Plesovice-t")
cal <- calibration(lr=Cameca_UPb,stand=st)
plot(cal)

pvermees/simplex documentation built on Sept. 2, 2023, 12:40 p.m.