`graph.strength()`

was renamed to `strength()`

to create a more
consistent API.

## Arguments

- graph
The input graph.

- vids
The vertices for which the strength will be calculated.

- mode
Character string, “out” for out-degree, “in” for in-degree or “all” for the sum of the two. For undirected graphs this argument is ignored.

- loops
Logical; whether the loop edges are also counted.

- weights
Weight vector. If the graph has a

`weight`

edge attribute, then this is used by default. If the graph does not have a`weight`

edge attribute and this argument is`NULL`

, then a`degree()`

is called. If this is`NA`

, then no edge weights are used (even if the graph has a`weight`

edge attribute).