scale function

methods

Scaling and Centering of Compositional Data

## S4 method for signature 'CompositionMatrix'
scale(x, center = TRUE, scale = TRUE)

Arguments

• x: A CompositionMatrix object.
• center: A logical scalar or a numeric vector giving the center to be substracted.
• scale: A logical scalar or a length-one numeric vector giving a scaling factor for multiplication.

Returns

A CompositionMatrix object.

Examples

## Data from Aitchison 1986
data("hongite")

## Coerce to compositional data
coda <- as_composition(hongite)

## Center and scale
scaled <- scale(coda, center = TRUE, scale = TRUE)
mean(scaled)
head(scaled)

References

Aitchison, J. (1986). The Statistical Analysis of Compositional Data. London: Chapman and Hall, p. 64-91.

Boogaart, K. G. van den & Tolosana-Delgado, R. (2013). Analyzing Compositional Data with R. Berlin Heidelberg: Springer-Verlag. tools:::Rd_expr_doi("10.1007/978-3-642-36809-7") .

See Also

Other statistics: aggregate(), condense(), covariance(), dist, mahalanobis(), margin(), mean(), pip(), quantile(), variance(), variance_total(), variation()

Author(s)

N. Frerebeau