centered logratio transformation

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Description

A data transformation according to the centered logratio transformation is done.

Usage

1
clr(X)

Arguments

X

numeric data frame or matrix

Details

The clr transformation is one possibility to transform compositional data to a real space. Afterwards, the transformed data can be analyzed in the usual way.

Value

Returns the transformed data matrix with the same dimension as X.

Author(s)

Peter Filzmoser <P.Filzmoser@tuwien.ac.at>

References

K. Varmuza and P. Filzmoser: Introduction to Multivariate Statistical Analysis in Chemometrics. CRC Press, Boca Raton, FL, 2009.

See Also

alr,ilr

Examples

1
2
data(glass)
glass_clr <- clr(glass)

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