This function and all of its descriptions have been obtained from the igraph package.

`V(graph)`

- graph
The graph (an igraph graph)

A vertex sequence containing all vertices, in the order of their numeric vertex ids.

`V`

for a complete description on this function

```
MyData <- coexpression.data
My_graph <- graph_from_data_frame(MyData)
My_graph_vertices <- V(My_graph)
```