Hello.
I am new in the field of network analysis and want to explore the idea of the Walktrap algorithm for my data. I fit the Ising models for my data, but now interested in examining the community showing the relationship between nodes. I am using the code underneath, but having warnings from R as:
"Error in igraph::cluster_walktrap(c, weights = c$weight, steps = 4, merges = TRUE, :
Not a graph object!"
Can someone please help me with this.
Thanks in advance.
#read data
x1<-read.csv("random_full_no typ1_only types.csv")
Res2 <- IsingFit(x1,family='binomial',gamma = 0.25, plot=T, AND=F)
Graph_Ising2 <- qgraph(Res2$weiadj, layout = "spring", labels = colnames(x1))
Res2$weiadj
##############
#walktrap algorithm
library("igraph")
c<-Graph_Ising2$Edgelist
igraph::cluster_walktrap(c, weights = c$weight, steps = 4,merges = TRUE, modularity = TRUE)