Re: [igraph] question about edge weights

[Tamás Nepusz]

> The nodes are the first two columns (ID and var). These represent survey 
> respondents and their contacts.

In this case, take a look at the graph.data.frame function, which creates a 
graph out of a data frame directly:

> test <- data.frame(id=23002:23007, var="Chief", value=c(4,4,3,3,3,2))
> g <- graph.data.frame(test)

The created graph will have the names in the id and var columns as the vertex 
names (see V(g)$name); the value column is assigned to an edge attribute named 
"value":

> E(g)$value
[1] 4 4 3 3 3 2

To reassign this to an edge attribute named "weight":

> E(g)$weight <- E(g)$value

Best,
T.