statsIso {GCDkit}R Documentation

Statistical plots of isotopic ratios/model ages

Description

Plots a boxplot or stripplot for a given isotopic parameter, respecting groups.

Usage

boxplotIso()

stripplotIso()

Arguments

None.

Details

The boxplot portrays realistically a statistical distribution of the data. The box represents, for each of the groups, the two quartiles, the line inside is a median, the whiskers show the whole range without outliers.

Stripplot shows 1D scatter plots for each of the groups, with some artificial noise (jitter) added to make the individual points better visible. Stripplots are a good alternative to boxplots when sample sizes are small.

The variables to choose from are:

Menu item

Explanation

87Sr/86Sri

Initial Sr isotopic ratios

143Nd/144Ndi

Initial Nd isotopic ratios

EpsNdi

Initial

ε(Nd)

values

1 stg DM model ages

(Goldstein et al. 1988)

Single-stage DM Nd model ages

1 stg DM model ages

(Liew & Hofmann 1988)

Single-stage DM Nd model ages

2 stg DM model ages

(Liew & Hofmann 1988)

Two-stage DM Nd model ages

Value

None.

Plugin

SrNd.r

Author(s)

Vojtech Janousek, vojtech.janousek@geology.cz

References

Liew T C & Hofmann A W (1988) Precambrian crustal components, plutonic associations, plate environment of the Hercynian Fold Belt of Central Europe: indications from a Nd and Sr isotopic study. Contrib Mineral Petrol 98: 129-138

Goldstein S L, O'Nions R K & Hamilton P J (1984) A Sm-Nd isotopic study of atmospheric dusts and particulates from major river systems. Earth Planet Sci Lett 70: 221-236


[Package GCDkit version 3.00 Index]