View source: R/compositionsCompatibility.R
gsi.produceV | R Documentation |
Given a representation specification for compositions, this function creates the matrix of logcontrasts and provides a suitable prefix name for naming variables.
gsi.produceV(
V = NULL,
D = nrow(V),
orignames = rownames(V),
giveInv = FALSE,
prefix = NULL
)
V |
either a matrix of logcontrasts or, most commonly, one of "clr", "ilr" or "alr" |
D |
the number of components of the composition represented |
orignames |
the names of the components |
giveInv |
logical, is the inverse logcontrast matrix desired? |
prefix |
the desired prefix name, if this is wished to be forced. |
A list with at least two elements
V
containing the final matrix of logcontrasts
prefix
containing the final prefix for names of transformed variables
W
eventually, the (transposed, generalised) inverse of V
, if giveInv=TRUE
gsi.produceV("alr", D=3)
gsi.produceV("ilr", D=3, orignames = c("Ca", "K", "Na"))
gsi.produceV("alr", D=3, orignames = c("Ca", "K", "Na"), giveInv = TRUE)
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