# graph_from_graphnel

From igraph v1.0.0
by Gabor Csardi

##### 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
attribute called `name`

`name`

##### Usage

```
graph_from_graphnel(graphNEL, name = TRUE, weight = TRUE,
unlist.attrs = TRUE)
```

##### Arguments

- graphNEL
- The graphNEL graph.
- name
- Logical scalar, whether to add graphNEL vertex names as an
igraph vertex attribute called
.`name`

- weight
- Logical scalar, whether to add graphNEL edge weights as an
igraph edge attribute called
. (graphNEL graphs are always weighted.)`weight`

- unlist.attrs
- 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.

##### Details

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.

##### Value

`graph_from_graphnel`

returns an igraph graph object.

##### See Also

`as_graphnel`

for the other direction,
`as_adj`

, `graph_from_adjacency_matrix`

,
`as_adj_list`

and `graph.adjlist`

for other
graph representations.

##### Examples

```
## 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
#'
```

*Documentation reproduced from package igraph, version 1.0.0, License: GPL (>= 2)*

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