igraph

I have a database with all the users and their roles, i've made a table that has usera, role, userb. i'm trying to give each user a color based on their team. the SQL code below can be used to create a similar dataset select concat('H',ABS(Checksum(NewID()) % 999999)) acentralacc, CONCAT('Role_',CHAR( FLOOR(65 + (RAND() * 25))))role,concat('H',ABS(Checksum(NewID()) % 999999))bcentralacc select concat('H',ABS(Checksum(NewID()) % 999999)) centralaccountname, CONCAT('Team_',CHAR( FLOOR(65 + (RAND() * 25))))team ' #get library's install.packages("igraph") library("igraph") #edges (connection

I have an igraph object g made from dataframe df : df <- data.frame(c(0,1,2,2,4), c(1,2,3,4,5), c(0.01, 0.03, 0.05, 0.01, 0.02)) colnames(df) <- c('parent_id', 'id', 'dt') g <- graph_from_data_frame(df) Edges are made between parent_id and id . > g IGRAPH DN-- 6 5 -- + attr: name (v/c), dt (e/n) + edges (vertex names): [1] 0->1 1->2 2->3 2->4 4->5 Change in thickness dt is the edge attribute. This can be thought of as the change in thickness between a 'parent' and 'child' iceberg (this is my problem/project). list.edge.attributes(g) [1] "dt" to visualize: plot(g, edge.label=E(g)$dt) Example of

I'm working on R on a graph and I'd like to have a hierarchical plot, based on the values in the vector S (a value for each node). lay2 <- layout_with_sugiyama(grafo, attributes="all", layers = S, hgap=10, vgap=10) plot(lay2$extd_graph, vertex.label.cex=0.5) However, the paramaters hgap e vgap are not taken and the graph is really confused (even because I've got 162 nodes). I'm doing something wrong or there is another way in which I can do a hierarchical graph? I believe that layout_with_sugiyama is working just fine, but you may be misinterpreting the output. Since you do not provide any

I have the following toy graph that represents, for instance, a forum thread: import igraph as ig g = ig.Graph(n = 12, directed=True) g.add_edges([(1,0),(2,1), (3,2), (4,3), (5,1), (6,2), (7,6), (8,7), (9,0), (10,0), (11,10)]) g.vs["label"] = ["A", "B", "A", "B", "C", "F", "C", "B", "D", "C", "D", "F"] ig.plot(g, layout="kk") However, there seems to be no layout that places the root vertex (id 0, label A) into the top and grows downwards. Am I missing something? OK, I'll just add this as an answer, for the comments. So the Reingold-Tilford layout works: http://igraph.sourceforge.net/doc/python

I am trying to create a simple forceNetwork , but the plot won't render. I keep getting the following warning: Warning message: It looks like Source/Target is not zero-indexed. This is required in JavaScript and so your plot may not render. How do I fix this? Note that simpleNetwork works fine so the problem seems to be in how I am specifying my data. library(igraph) library(networkD3) set.seed(42) temp<-data.frame(source=c(1,2,3,4),target=c(2,3,4,4))#csv[1:500,] links<-data.frame(source=temp$source,target=temp$target) g<-graph.data.frame(cbind(temp$source,temp$target), directed=T) nodes<-data