I have constructed a gene co-expression network from RNA-seq data. The network file is in edge list format of memory around 1gb which was created by calculating Pearson correlation of each gene pairs and the gene pairs which having correlation >95% were selected to create the edge list.
I have clustered this gene network (edge list) using igraph R package "cluster_louvian" community detection algorithm and obtained 534 subclusters.
c <- cluster_louvian(g) c$membership
to get largest subcluster
sub1 <- induced.subgraph(g, membership(cl) ==order(-sizes(cl)))
I am finding difficulty to write the subcluster into a text file as an edge list How can I save each subcluster in separate files (text files) as edge list?