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IsoplotR

IsoplotR is a free and open-source substitute for Kenneth Ludwig's popular Isoplot add-in to Microsoft Excel. This Github repository contains the code for IsoplotR's core commands. A graphical user interface is provided in a separate repository at https://github.com/pvermees/IsoplotRgui.

Prerequisites

You must have R installed on your system (see http://r-project.org). Additionally, to install IsoplotR from Github, you also need the devtools package. This can be installed by typing the following code at the R command line prompt:

install.packages('devtools')

Installation

The most recent stable version of IsoplotR is available from CRAN at https://cran.r-project.org/package=IsoplotR and can be installed on your system as follows:

install.packages('IsoplotR')

Alternatively, to install the current development version of IsoplotR from Github, type:

library(devtools)
install_github('pvermees/IsoplotR')

Further information

See http://isoplotr.london-geochron.com

Author

Pieter Vermeesch

License

This project is licensed under the MIT License

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Version

Install

install.packages('IsoplotR')

Monthly Downloads

976

Version

0.17

License

GPL-2

Maintainer

Pieter Vermeesch

Last Published

September 5th, 2017

Functions in IsoplotR (0.17)

central

Calculate U-Th-He and fission track central ages and compositions
concordia

Concordia diagram
examples

Example datasets for testing IsoplotR
helioplot

Visualise U-Th-He data on a logratio plot or ternary diagram
ellipse

Get coordinates of error ellipse for plotting
evolution

Th-U evolution diagram
IsoplotR-internal

Internal code objects
age

Calculate isotopic ages
agespectrum

Plot a (40Ar/39Ar) release spectrum
cad

Plot continuous data as cumulative age distributions
settings

Load settings to and from json
read.data

Read geochronology data
ludwig

Linear regression of X,Y,Z-variables with correlated errors, taking into account decay constant uncertainties.
isochron

Calculate and plot isochrons
kde

Create (a) kernel density estimate(s)
peakfit

Finite mixture modelling of geochronological datasets
radialplot

Visualise heteroscedastic data on a radial plot
titterington

Linear regression of X,Y,Z-variables with correlated errors
set.zeta

Calculate the zeta calibration coefficient for fission track dating
weightedmean

Calculate the weighted mean age
york

Linear regression of X,Y-variables with correlated errors
mds

Multidimensional Scaling