isochron {GCDkit}R Documentation

Rb-Sr and Sm-Nd isochrons

Description

Plots a Rb-Sr or Sm-Nd isochron diagram and calculates a simple linear fit to the selected data. isochron.png

Usage

isochron()

Arguments

None.

Details

The samples can be selected based on combination of three searching mechanisms (by sample name/label, range or a Boolean condition) - see selectSamples for details.

If empty list is given, all the samples for which the required isotopic data are available are plotted and the user can choose their subset interactively. Then the isochron diagram is redrawn only with those samples.

The data are fitted by simple least-squares linear fit, from which the age and initial ratio are calculated.

Value

Returns a numeric vector with the calculated age and initial ratio.

Plugin

SrNd.r

Author(s)

Vojtech Janousek, vojtech.janousek@geology.cz


[Package GCDkit version 4.0 Index]