## ewLasso.R (2013-03-30)

##   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

    N <- attr(X, "Size")
    labels <- attr(X, "Labels")
    if (is.null(labels)) labels <- as.character(1:N)
    ans <- .C("ewLasso", as.double(X), as.integer(N),
              phy$edge[, 1], phy$edge[, 2],
              DUP = FALSE, NAOK = TRUE, PACKAGE = "ape")
}