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(what=NULL)

stripplotIso(what=NULL)

Arguments

what

the variable name; see Details.

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. boxplotIso.png

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. stripplotIso.png

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

In addition, any variable names starting with the text "delta" will appear in this list.

The variable names can be specified also upon the function call, as the parameter "what". The possibilities are "87Sr/86Sri", "143Nd/144Ndi", "EpsNdi", "TDM.Gold", "TDM" or "TDM.2stg".

Value

a list object with data produced by the function 'boxplot'.

Plugin

SrNd.r

Author(s)

Vojtěch Janoušek, vojtech.janousek@geology.cz

References

Goldstein SL, O'Nions RK & Hamilton PJ (1984) A Sm-Nd isotopic study of atmospheric dusts and particulates from major river systems. Earth Planet Sci Lett 70: 221-236 doi: 10.1016/0012-821X(84)90007-4

Liew TC & Hofmann AW (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 doi: 10.1007/BF00402106

See Also

srnd boxplot

Examples

    data(blatna_iso)
    accessVar("blatna_iso")
    groupsByLabel("Intrusion")
    
    boxplotIso("EpsNdi")

    stripplotIso("EpsNdi")

[Package GCDkit version 6.1 Index]