invilr {robCompositions} | R Documentation |
The inverse transformation of ‘ilr()’.
invilr(x.ilr)
x.ilr |
data frame or matrix |
For details on the choice of the balances, please, see at the research report for which the link is given below.
The transformed data.
Karel Hron
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. (2010) Imputation of missing values for compositional data using classical and robust methods Computational Statistics and Data Analysis, In Press, Corrected Proof, ISSN: 0167-9473, DOI:10.1016/j.csda.2009.11.023
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)