[R] data network format and grouping analysis

Hi everyone, I have a dataset of friendship with this format: ego alter 47461 2 97421 3 14738 1NA 47472NA 974323 14739 21 4748313 97443 5 14740 314 47494NA 97454NA 14741 4NA 47505NA 9746513

Re: [R] data network format and grouping analysis

The following works to get an igraph object from a matrix edgelist: dat2 - matrix(rep(seq(1,5,1), 4), nrow=10, ncol=2) graph.edgelist( dat2 ) I tried with NA's but graph.edgelist did not allow NA's. Wouldn't you just leave those rows out with NA's in them? An NA means there is no edge, right?