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2011 Aug 05
1
matrix into vector with vertex names
Using Igraph, I create shortest paths, then convert the matrix into three column vectors - "vertex1", "vertex2", "shortestpath" - as the code below shows. #code for generating shortest path matrix and creating a 3 columns from an igraph graph object "y" y_s<-shortest.paths(y, weights = NULL) y_s <- melt(y_s)[melt(upper.tri(y_s))$value,] #Step 2: this is where the trouble with memory occurs y_s[,1] <- V(y)$name[y_s[,1]] y_s[,2] <- V(y)$name[y_s[,2]] names(y_s)<-c("vertex1", "vertex2", "shortestpath") Howev...