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# IGraph R package
# Copyright (C) 2005-2012 Gabor Csardi <csardi.gabor@gmail.com>
# 334 Harvard street, Cambridge, MA 02139 USA
#
# 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.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA
#
###################################################################
are.connected <- function(graph, v1, v2) {
if (!is.igraph(graph)) {
stop("Not a graph object")
}
on.exit( .Call("R_igraph_finalizer", PACKAGE="igraph") )
.Call("R_igraph_are_connected", graph, as.igraph.vs(graph, v1)-1,
as.igraph.vs(graph, v2)-1,
PACKAGE="igraph")
}
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