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# File src/library/stats/R/contrast.R
# Part of the R package, http://www.R-project.org
#
# Copyright (C) 1995-2012 The R Core Team
#
# 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 of the License, or
# (at your option) any later version.
#
# 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/
## a fast version of diag(n, .) / sparse-Diagonal() + dimnames
## Originally .Diag in stats:contrast.R
.RDiag <- function (nms, sparse) {
n <- as.integer(length(nms))
d <- c(n, n)
dn <- list(nms, nms)
# if (sparse) {
# requireNamespace("Matrix", quietly = TRUE)
# new("ddiMatrix", diag = "U", Dim = d, Dimnames = dn)
# }
# else
array(c(rep.int(c(1, numeric(n)), n - 1L), 1), d, dn)
}
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