Computes inverse log-ratio transformations.
Usage
transform_inverse(object, ...)
# S4 method for CLR
transform_inverse(object)
# S4 method for ALR
transform_inverse(object)
# S4 method for ILR
transform_inverse(object)Arguments
- object
A CompositionMatrix object.
- ...
Currently not used.
Value
A CompositionMatrix object.
References
Aitchison, J. (1986). The Statistical Analysis of Compositional Data. London: Chapman and Hall. doi:10.1007/978-94-009-4109-0 .
Egozcue, J. J., Pawlowsky-Glahn, V., Mateu-Figueras, G. & Barceló-Vidal, C. (2003). Isometric Logratio Transformations for Compositional Data Analysis. Mathematical Geology, 35(3), 279-300. doi:10.1023/A:1023818214614 .
Fišerová, E. & Hron, K. (2011). On the Interpretation of Orthonormal Coordinates for Compositional Data. Mathematical Geosciences, 43(4), 455‑468. doi:10.1007/s11004-011-9333-x .
Greenacre, M. J. (2019). Compositional Data Analysis in Practice. Boca Raton: CRC Press.
See also
Other log-ratio transformations:
transform_alr(),
transform_clr(),
transform_ilr(),
transform_lr(),
transform_plr()
Examples
## Coerce to compositional data
data("hongite")
coda <- as_composition(hongite)
## Pairwise log-ratio
lr <- transform_lr(coda)
## Centered log-ratio
clr <- transform_clr(coda)
## Additive log-ratio
alr <- transform_alr(coda)
## Isometric log-ratio
ilr <- transform_ilr(coda)
plr <- transform_plr(coda)
## Inverse transformation
inv_clr <- transform_inverse(clr)
all.equal(coda, inv_clr)
#> [1] TRUE
inv_alr <- transform_inverse(alr)
all.equal(coda, inv_alr)
#> [1] TRUE
inv_ilr <- transform_inverse(ilr)
all.equal(coda, inv_ilr)
#> [1] TRUE
inv_plr <- transform_inverse(plr)
all.equal(coda, inv_plr)
#> [1] TRUE