`library(clustAnalytics)`

The package includes efficient implementations of the clustering coefficient and transitivity for weighted networks introduced by . As they can be applied to weighted graphs in general and not only to their partition into communities, they are simply called with the graph as the only argument:

```
data(karate, package="igraphdata")
weighted_clustering_coefficient(karate)
#> [1] 0.8127164
```

To be able to obtain the result for every community in the graph, we provide the function *apply_subgraphs*; which given a graph, a membership vector and a scalar function, applies the function to every community and returns the vector of results. In this case it works as follows:

```
apply_subgraphs(karate, V(karate)$Faction, weighted_clustering_coefficient)
#> [1] 0.9514233 0.7783815
```