robVariation {robCompositions} | R Documentation |
Estimates the variation matrix with robust methods.
robVariation(x)
x |
data frame or matrix with positive entries |
The variation matrix is estimated for a given compositional data set. Instead of using the classical standard deviations the
MAD
is used.
The robust variation matrix.
Matthias Templ
Aitchison, J. (1986) The Statistical Analysis of Compositional Data Monographs on Statistics and Applied Probability. Chapman & Hall Ltd., London (UK). 416p.
data(aitchison395) robVariation(aitchison395) # require(compositions) # variation(aitchison395)