Nothing

```
# Copyright 2012 Paolo Martini <paolo.martini@unipd.it>
#
#
# This file is part of clipper.
#
# clipper is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License
# version 3 as published by the Free Software Foundation.
#
# clipper 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public
# License along with clipper. If not, see <http://www.gnu.org/licenses/>.
getJunctionTreePaths <- function(graph, root=NULL) {
if (sum(diag(as(graph,"matrix")))!=0){
graph <- removeSelfLoops(graph)
}
ripped <- rip(triangulate(mmmoralize(graph)), root=root)
if (length(ripped)==0){
warning("The DAG provided can not be ripped. Please check if your input graph is a DAG.")
return(NULL)
}
cliques <- ripped$cliques
if (length(cliques) == 1){
warning("The DAG presents only one clique.")
return(list(1))
}
parents <- ripped$parents
edges <- cbind(parents,1:length(parents))
edges <- edges[edges[,1] != 0,, drop=FALSE]
if (nrow(edges) == 0){
warning("The DAG presents cliques that are not connected.")
return(NULL)
}
startingCliques <- extractStarts(edges, 1:length(parents))
endingCliques <- extractEnds(edges, 1:length(parents))
junctionTree <- graph(edgeList(edges), directed=FALSE)
paths <- NULL
for (s in startingCliques) {
shPaths <- get.all.shortest.paths(junctionTree, s, endingCliques)$res
shPaths <- lapply(shPaths, as_ids)
paths <- c(paths, shPaths)
}
return(paths)
}
```

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