Convert graphNEL objects from the graph package to igraph
The graphNEL class is defined in the
graph package, it is another
way to represent graphs.
graph_from_graphnel takes a graphNEL
graph and converts it to an igraph graph. It handles all
graph/vertex/edge attributes. If the graphNEL graph has a vertex
graph_from_graphnel(graphNEL, name = TRUE, weight = TRUE, unlist.attrs = TRUE)
- The graphNEL graph.
- Logical scalar, whether to add graphNEL vertex names as an
igraph vertex attribute called
- Logical scalar, whether to add graphNEL edge weights as an
igraph edge attribute called
. (graphNEL graphs are always weighted.)
- Logical scalar. graphNEL attribute query functions
return the values of the attributes in R lists, if this argument is
TRUE(the default) these will be converted to atomic vectors, whenever possible, before adding them to the igraph graph.
Because graphNEL graphs poorly support multiple edges, the edge attributes of the multiple edges are lost: they are all replaced by the attributes of the first of the multiple edges.
graph_from_graphnelreturns an igraph graph object.
## Undirected g <- make_ring(10) V(g)$name <- letters[1:10] GNEL <- as_graphnel(g) g2 <- graph_from_graphnel(GNEL) g2 ## Directed g3 <- make_star(10, mode="in") V(g3)$name <- letters[1:10] GNEL2 <- as_graphnel(g3) g4 <- graph_from_graphnel(GNEL2) g4 #'