IsoplotR (version 0.8)

read.data: Read geochronology data

Description

Cast a .csv file or a matrix into one of IsoplotR's data classes

Usage

read.data(x, ...)
"read.data"(x, method = "U-Pb", format = 1, ...)
"read.data"(x, method = "U-Pb", format = 1, ...)

Arguments

x

a file name (.csv format) or matrix

...

optional arguments to the read.csv function

method

one of 'U-Pb', 'Ar-Ar', 'detritals' 'U-Th-He', 'fissiontracks' or 'other'

format

formatting option, depends on the value of method.

- if method = 'Ar-Ar', then format is one of either:

1. 39/40, s[39/40], 36/40, s[36/40], 39/36, s[39/36]
2. 39, 39/40, s[39/40], 36/40, s[36/40], 39/36, s[39/36]

- if method = 'fissiontracks', then format is one of either:

1. the External Detector Method (EDM), which requires a $\zeta$-calibration constant and its uncertainty, the induced track density in a dosimeter glass, and a table with the spontaneous and induced track densities.

LA-ICP-MS-based fission track data using the $\zeta$-calibration method, which requires a 'session $\zeta$' and its uncertainty and a table with the number of spontaneous tracks, the area over which these were counted and one or more U/Ca- or U-concentration measurements and their analytical uncertainties.

LA-ICP-MS-based fission track data using the 'absolute dating' method, which only requires a table with the the number of spontaneous tracks, the area over which these were counted and one or more U/Ca- or U-concentration measurements and their analytical uncertainties.

Value

an object of class UPb, ArAr, UThHe, detritals fissiontracks or other

Examples

# load one of the built-in .csv files:
data(examples)
concordia(examples$UPb)