plot.GPA

Plots the group configuration of a Generalised Procrustes Analysis

Bundles a number of established statistical methods to facilitate the visual interpretation of large datasets in sedimentary geology. Includes functionality for adaptive kernel density estimation, principal component analysis, correspondence analysis, multidimensional scaling, generalised procrustes analysis and individual differences scaling using a variety of dissimilarity measures. Univariate provenance proxies, such as single-grain ages or (isotopic) compositions are compared with the Kolmogorov-Smirnov, Kuiper, Wasserstein-2 or Sircombe-Hazelton L2 distances. Categorical provenance proxies such as chemical compositions are compared with the Aitchison and Bray-Curtis distances,and count data with the chi-square distance. Varietal data can either be converted to one or more distributional datasets, or directly compared using the multivariate Wasserstein distance. Also included are tools to plot compositional and count data on ternary diagrams and point-counting data on radial plots, to calculate the sample size required for specified levels of statistical precision, and to assess the effects of hydraulic sorting on detrital compositions. Includes an intuitive query-based user interface for users who are not proficient in R.

Pieter Vermeesch

provenance

Statistical Toolbox for Sedimentary Provenance Analysis

plot.GPA function

<dl><dt>x</dt>
<dd>an object of class <code>GPA</code></dd>
<dt>pch</dt>
<dd>plot symbol</dd>
<dt>pos</dt>
<dd>position of the sample labels relative to the plot
symbols if pch != NA</dd>
<dt>col</dt>
<dd>plot colour (may be a vector)</dd>
<dt>bg</dt>
<dd>background colour (may be a vector)</dd>
<dt>cex</dt>
<dd>relative size of plot symbols</dd>
<dt>...</dt>
<dd>optional arguments to the generic <code>plot</code> function</dd></dl>

Arguments

Plot a Procrustes configuration — plot.GPA

<dl>

<dt>x</dt>
<dd>an object of class <code>GPA</code></dd>


<dt>pch</dt>
<dd>plot symbol</dd>


<dt>pos</dt>
<dd>position of the sample labels relative to the plot
symbols if pch != NA</dd>


<dt>col</dt>
<dd>plot colour (may be a vector)</dd>


<dt>bg</dt>
<dd>background colour (may be a vector)</dd>


<dt>cex</dt>
<dd>relative size of plot symbols</dd>


<dt>...</dt>
<dd>optional arguments to the generic <code>plot</code> function</dd>

</dl>

plot.GPA: Plot a Procrustes configuration

Description

Usage

Arguments

See Also

Examples