Greenacre's power transformation: Greenacre's power transformation
Description
Greenacre's power transformation.
Usage
green(x, theta)
Arguments
x
A matrix with the compositional data.
theta
The value of the power transformation, it has to be between -1 and 1. If zero values are present it has to
be greater than 0. If \(\theta=0\) the log transformation is applied.
Value
A matrix with the power transformed data.
Details
Greenacre's transformation is applied to the compositional data.
References
Greenacre, M. (2009). Power transformations in correspondence analysis. Computational Statistics & Data Analysis, 53(8): 3107-3116.
http://www.econ.upf.edu/~michael/work/PowerCA.pdf