Printing network properties of nodes with igraph for R

Question

I'm doing SNA with the igraph R package and need to save some network properties of the nodes along with each node's id to a file for further analysis. That is, a document with the first column representing a node id and the other columns its properties. I'm ok with centrality measures but other igraph functions like transitivity for example, return only a vector with the computed network properties as in

transitivity(graph,type=c("local"))

[1] 0.4285714 0.3976608 0.5454545 0.7142857 0.3928571 0.4640523
[7] 0.5620915 0.6095238 0.3571429 0.4743590 0.3416667 0.6023392
[13] 0.6000000 0.5228758 0.4771242 0.4835165 0.3246753 0.5000000
[19] 0.3636364 0.5777778 0.3571429 0.4487179 0.5238095 0.4857143

What I would like to do is to be able to add transitivity to the following data frame of centrality measures:

metrics <- data.frame(
  deg=degree(graph)
  bet=betweenness(graph)
  clo=closeness(graph)
  eig=evcent(graph)$vector
)

which returns:

    deg        bet        clos       eig
001   7  8.6046215 0.009523810 0.1697311
002  19 48.2885279 0.012500000 0.7012156
003  12 10.5285962 0.011111111 0.4280625
004  15  8.6161170 0.011363636 0.7729130

I appreciate any help. Thanks!

Answer 1

Just add the function to your data.frame :

metrics <- data.frame(
  deg=degree(graph),
  bet=betweenness(graph),
  clo=closeness(graph),
  eig=evcent(graph)$vector,
  tra=transitivity(graph,type=c("local"))
)

Answer 2

You can add V(graph)$name to your data frame to get the ids associated with the measures.

 metrics <- data.frame(
   id = V(graph)$name
   deg=degree(graph),
   bet=betweenness(graph),
   clo=closeness(graph),
   eig=evcent(graph)$vector,
   tra=transitivity(graph,type=c("local"))
 )