R/class.ind.R

In BART: Bayesian Additive Regression Trees

# copyright (C) 1994-2013 Bill Venables and Brian Ripley
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 or 3 of the License
#  (at your option).
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  A copy of the GNU General Public License is available at
#  http://www.r-project.org/Licenses/
#

class.ind <- function(cl)
{
    n <- length(cl)
    cl <- as.factor(cl)
    x <- matrix(0, n, length(levels(cl)) )
    x[(1L:n) + n*(unclass(cl)-1L)] <- 1
    dimnames(x) <- list(names(cl), levels(cl))
    x
}