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## ewLasso.R (2013-04-02)
## Lasso Tree
## Copyright 2013 Andrei-Alin Popescu
## This file is part of the R-package `ape'.
## See the file ../COPYING for licensing issues.
ewLasso <- function(X, phy)
{
if (is.matrix(X)) X <- as.dist(X)
X[is.na(X)] <- -1
X[X < 0] <- -1
X[is.nan(X)] <- -1
if (is.rooted(phy)) {
phy <- unroot(phy)
warning("'phy' is rooted: it was unrooted for this operation")
}
N <- attr(X, "Size")
labels <- attr(X, "Labels")
if (is.null(labels)) labels <- as.character(1:N)
ans <- .C(C_ewLasso, as.double(X), as.integer(N),
as.integer(phy$edge[, 1]), as.integer(phy$edge[, 2]),
NAOK = TRUE)
}
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