i have data frame, edge list r/igraph: node_one node_two weight group 1 2 1 175221 3 4 1 175221 5 6 1 175221 7 8 1 175221 9 10 1 576546 11 12 2 576546 13 14 2 576546 15 16 2 789535 17 18 2 789535 19 20 2 789535 i want loop through df according different value of hee_provn1, create multiple graphs , graph measures. my code here: # install packages library(dplyr) library(igraph) df <- data.frame(node_one=seq(1,19,2), node_two=seq(2,20,2), weight = c(rep(2,5),rep(2,5)), group=c(rep(175221,4),rep(576546,3),rep(789535,3))) final.df1 <- c() for(x in unique(df$group)){ df2 <- subset(df, subset = group == x) # create graph g <- graph_from_data_frame(df2, directed=false) d = degree(g) # number of vertex's adjacent edges c = closen...