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compositions (version 0.9-11)

Compositional Data Analysis

Description

The package provides functions for the consistent analysis of compositional data (e.g. portions of substances) and positive numbers (e.g. concentrations) in the way proposed by Aitchison.

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Version

Install

install.packages('compositions')

Monthly Downloads

17,456

Version

0.9-11

License

GPL version 2 or newer

Maintainer

K Gerald van den Boogaart

Last Published

August 21st, 2025

Functions in compositions (0.9-11)

Convert between clr and ilr, and between cpt and ipt. Acts in vectors and in bilinear forms.

Perturbation of compositions

Draws straight lines from point to point.

Internal functions of the compositions package

Simple treatment of real vectors

Uncentered log transform

Spliting datasets in groups given by factors

Internal function: Compute a desired compositional margin

Additive log ratio transform

Closure of a composition

Normalize vectors to norm 1

Principal component analysis for real amounts

kingTetrahedron

Ploting composition into rotatable tetrahedron

Displaying amounts in scatterplots

Variances and covariances of amounts and compositions

Internal functions: Parallel operations of single and multiple datasets

Internal variable: Negligible differences

Internal function: Convert to plain vector or matrix

Internal function: A panel displaying a label only

Isometric log transform

gsi.isSingleRow

Internal function: Can something be considered as a single multivariate data item?

Internal functions of the compositions package

Internal functions of the compositions package

Compositions as elements of the Simplex embedded in the D-dimensional real space

inner product for datasets with vector scale

gsi.diagGenerate

Internal functions: Generate a diagonal matrix

Isometric planar transform

Internal function: give an object a derived subclass

Loadings of relations of two amounts

Dirichlet distribution

Internal functions: Storing integers as reals

The multivariate lognormal distribution

Summarizing a compositional dataset in terms of ratios

Additive planar transform

Draws infinite straight lines.

Correlations of amounts and compositions

Normal distributions on special spaces

vectorial arithmetic for datasets in a classical vector scale

Summaries of amounts

Hydrochemical composition data set of Llobregat river basin water (NE Spain)

gsi.expandrcomp

Internal function: Scaling rcomp

Distances in variouse approaches

Power transform in Aitchisons simplex

Group amounts of parts

Isometric default transform

The geometric mean

Marginal compositions in Aitchison Compositions

The canonical basis in the clr plane used for ilr and ipt transforms.

Internal functions: A conditional drop

SimulatedAmounts

Simulated amount datasets

inner product for matrices and vectors

Principal component analysis for Aitchison compositions

Amounts analysed in log-scale

Centered log ratio transform

Vector space norm

Arithmetic operations for composition in real geometry

Metric summary statistics of real, amount or compositional data

Internal functions of the compositions package

Internal functions of the compositions package

Centered planar transform

Arithmetik of rplus-scale

Isometric log ratio transform

The arithmetic mean of rows or columns

Displaying compositions in ternary diagrams

Internal functions of the compositions package

gsi.diagExtract

Internal functions: Get the diagonal of a matrix

Internal function: Invert a permutation

Variation matrices of amounts and compositions

Centered default transform

Mean amounts and mean compositions

Normal quantile plots for compositions and amounts

endpointCoordinates

Amounts in barytic-coordinates

Read standard data files

Reads a data file in a geoeas format

Barcharts of amounts

Internal function: Reshape an object to the shape type of another

Check for compositional data type

Amounts i.e. positive numbers analysed as objects of the real vector space

Aitchison compositions

powerofpsdmatrix

power transform of a matrix

Convert "compositions" classes to data frames

vectorial arithmetic for datasets with aplus class

Normalizing datasets by centering and scaling

Interal function: Get number of samples and number of parts in a compositional object

Treating single compositions as one-row datasets

Displaying compositions and amounts by boxplots

Principle component analysis for Real data

Isometric identity transform

acompscalarproduct

inner product for datasets with a vector space structure

Principal component analysis for real compositions

Internal functions of the compositions package

Marginal compositions in real geometry

Principal component analysis for amounts in log geometry

The names of the parts

Total sum of amounts

Draws connected lines from point to point.

isoPortionLines

Isoportion- and Isoproportion-lines

Parallel scalar products

The uniform distribution on the simplex

Summary of compositions in real geometry