robCompositions (version 1.3.2)

invilr: Inverse isometric log-ratio transformation

Description

The inverse transformation of ilr().

Usage

invilr(x.ilr)

Arguments

x.ilr

data frame or matrix

Value

• The transformed data.

Details

For details on the choice of the balances, please, see at the research report for which the link is given below.

References

Egozcue J.J., V. Pawlowsky-Glahn, G. Mateu-Figueras and C. Barcel'o-Vidal (2003) Isometric logratio transformations for compositional data analysis. Mathematical Geology, 35(3) 279-300 \

Hron, K. and Templ, M. and Filzmoser, P. (2008) Imputation of missing values for compositional data using classical and robust methods Research Report SM-2008-4, Vienna University of Technology, 15 pages.

See Also

ilr

Examples

require(MASS)
Sigma <- matrix(c(5.05,4.95,4.95,5.05), ncol=2, byrow=TRUE)
set.seed(123)
z <- mvrnorm(100, mu=c(0,2), Sigma=Sigma)
invilr(z)