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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

Vermeesch, P., 2018, IsoplotR: a free and open toolbox for geochronology. Geoscience Frontiers, doi: 10.1016/j.gsf.2018.04.001 (in press).

Author

Pieter Vermeesch

License

This project is licensed under the GPL-3 License

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Version

Install

install.packages('IsoplotR')

Monthly Downloads

652

Version

1.2

License

GPL-3

Maintainer

Pieter Vermeesch

Last Published

May 1st, 2018

Functions in IsoplotR (1.2)

age

Calculate isotopic ages
concordia

Concordia diagram
agespectrum

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

Get coordinates of error ellipse for plotting
isochron

Calculate and plot isochrons
cad

Plot continuous data as cumulative age distributions
set.zeta

Calculate the zeta calibration coefficient for fission track dating
radialplot

Visualise heteroscedastic data on a radial plot
mds

Multidimensional Scaling
settings

Load settings to and from json
peakfit

Finite mixture modelling of geochronological datasets
read.data

Read geochronology data
titterington

Linear regression of X,Y,Z-variables with correlated errors
central

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

Create (a) kernel density estimate(s)
york

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

Calculate the weighted mean age
ludwig

Linear regression of U-Pb data with correlated errors, taking into account decay constant uncertainties.
IsoplotR

library(IsoplotR)
evolution

Th-U evolution diagram
examples

Example datasets for testing IsoplotR
IsoplotR-internal

Internal code objects
helioplot

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