Nothing
`rda.formula` <-
function (formula, data, scale = FALSE, na.action = na.fail,
subset = NULL, ...)
{
if (missing(data)) {
data <- parent.frame()
} else {
data <- eval(match.call()$data, environment(formula),
enclos = .GlobalEnv)
}
d <- ordiParseFormula(formula, data = data, na.action = na.action,
subset = substitute(subset))
sol <- rda.default(d$X, d$Y, d$Z, scale)
if (!is.null(sol$CCA) && sol$CCA$rank > 0) {
centroids <- centroids.cca(sol$CCA$wa, d$modelframe)
if (!is.null(sol$CCA$alias))
centroids <- unique(centroids)
if (!is.null(centroids)) {
rs <- rowSums(centroids^2)
centroids <- centroids[rs > 1e-04,, drop = FALSE]
if (length(centroids) == 0)
centroids <- NULL
}
if (!is.null(centroids))
sol$CCA$centroids <- centroids
}
## replace rda.default call
call <- match.call()
call[[1]] <- as.name("rda")
call$formula <- formula(d$terms)
sol$call <- call
if (!is.null(d$na.action)) {
sol$na.action <- d$na.action
sol <- ordiNAexclude(sol, d$excluded)
}
if (!is.null(d$subset))
sol$subset <- d$subset
## drops class in c()
sol <- c(sol,
list(terms = d$terms,
terminfo = ordiTerminfo(d, d$modelframe)))
class(sol) <- c("rda", "cca")
sol
}
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