ilr_basis {coda.base} | R Documentation |
Build an isometric log-ratio basis for a composition with k+1 parts
h[i] = √(i/(i+1)) ( log(x[1] … x[i])/i - log(x[i+1]) )
for i in 1… k.
ilr_basis(dim, type = "default")
dim |
number of components |
type |
if different than 'pivot' (pivot balances) or 'cdp' (codapack balances) default balances are returned, which computes a triangular Helmert matrix as defined by Egozcue et al., 2013. |
Modifying parameter type (pivot or cdp) other ilr basis can be generated
matrix
Egozcue, J.J., Pawlowsky-Glahn, V., Mateu-Figueras, G. and Barceló-Vidal C. (2003). Isometric logratio transformations for compositional data analysis. Mathematical Geology, 35(3) 279-300
ilr_basis(5)