search for: betweenness

Hello, I am calculating 'Betweenness' of a large network using R. Currently, I have the node-node information (City1-City2) in an excel file, present in two columns where column A has City1 and column B has City2 that city1 is connected to. These are the steps that I go through to calculate betweenness of my network. a) Convert t...

I am getting some unexpected results from some functions of igraph and it is possible that I am misinterpreting the vertex numbers. Eg., the max betweenness measure seems to be from a vertex that is not connected to a single other vertex. Below if my code snippet: require(igraph) my.graph <- graph.adjacency(adjmatrix = my.adj.matrix, mode=c("undirected")) most.between.vert <- colnames(my.adj.matrix)[which(betweenness(graph = my.grap...

Hi, I have the following problem. I have 5 phones behind the same nat (canreinvite=yes). it works fine to receive calls and to make calls. sound quality is good, so everything works fine. The poblem is that the phone behind nat cant call each other. It works if canreinvite=no. But i want to do this. Does anyone have an idea? Regards, cjk.

...0,dim=c(4,4)) a<-1 while(a<=length(matrixmy)) { i=matrixmy[a] a<-a+1 j=matrixmy[a] a<-a+1 k=matrixmy[a] arr[i,j]<-k arr[j,i]<-k a<-a+1 } Created matrix mat1<-matrix(data=arr,nrow=4,ncol=4) g<-graph.adjacency(adjmatrix=mat1,mode=c("undirected")) betweenness(g) The answer I get is 0 0 0 0 I was expecting Node 1 will have high value. Can someone tell me why it is happening like this. Thanks in advance. Nathna -- View this message in context: http://www.nabble.com/Weighted-Graph-Link-strength-%28-I-am-making-mistake-please-help%29-tp22707957p2...

Samba 4.0.4 installed, provisioned by classicupgrade, running on Debian Squeeze: -------------------------------------------------------------------------------- The issue is, that changes to the roaming profile is not transferred after log ins/outs between Win2K and XP machine. In example: I log into the W2k machine with my testuser and create a "testdir1" and "testdir2" on

...e fast greedy community finding algorithm, etc. - We have a new graph layout algorithm called 'graphopt'. - A bunch of new functions are added: biconnected components and articulation points, dyad and triad census, functions for vertex similarity, functions for estimating closeness, betweenness and edge betweenness, etc. - igraph can write files in the DOT format now. - Some graphics improvements, e.g. it is possible to draw graphs on top of each other, etc. - Many bugs were fixed, the most important one is probably that now memory is always properly deallocated when CTRL+C (E...

...e fast greedy community finding algorithm, etc. - We have a new graph layout algorithm called 'graphopt'. - A bunch of new functions are added: biconnected components and articulation points, dyad and triad census, functions for vertex similarity, functions for estimating closeness, betweenness and edge betweenness, etc. - igraph can write files in the DOT format now. - Some graphics improvements, e.g. it is possible to draw graphs on top of each other, etc. - Many bugs were fixed, the most important one is probably that now memory is always properly deallocated when CTRL+C (E...

I would like to apply network measures (such as betweenness centrality, upper boundedness, etc.) to a weighted graph with non-integer weights, defined by a euclidean distance matrix. The package sna provides the measures that I want to use, but seems only to operate on binary graphs. I have read work by Mark Newman (http://aps.arxiv.org/abs/cond-mat/040750...

...Eccentricity (eccentricity()), and radius (radius()) calculations. - Shortest path calculations with get.shortest.paths() can now return the edges along the shortest paths. - get.all.shortest.paths() now supports edge weights. Centrality ---------- - Centralization scores for degree, closeness, betweenness and eigenvector centrality. See centralization.scores(). - Personalized Page-Rank scores, see page.rank(). - Subgraph centrality, subgraph.centrality(). - Authority (authority.score()) and hub (hub.score()) scores support edge weights now. - Support edge weights in betweenness and closeness cal...

...Eccentricity (eccentricity()), and radius (radius()) calculations. - Shortest path calculations with get.shortest.paths() can now return the edges along the shortest paths. - get.all.shortest.paths() now supports edge weights. Centrality ---------- - Centralization scores for degree, closeness, betweenness and eigenvector centrality. See centralization.scores(). - Personalized Page-Rank scores, see page.rank(). - Subgraph centrality, subgraph.centrality(). - Authority (authority.score()) and hub (hub.score()) scores support edge weights now. - Support edge weights in betweenness and closeness cal...

Hi everyone, I have successfully created and analyzed my network data. I am new to R, and Network Analysis too, but I want to color my vertex based on some of the centrality measures calculated. Can someone point me in the right direction? Again, I am new to R, but given how powerful R appears to be, I figure this is probably pretty easy to do, I just wish I could figure it out. Many thanks

...dgelist") # Plot the network: gplot(dat.edg, displaylabels = TRUE, label.cex = 0.9, arrowhead.cex = 0.9, vertex.col = "red") Is there any way you know of scaleing the size of the nodes in the graph? I was hoping to scale the nodes according to their individual betweeness score. Betweenness can be calculated for each node in the example above, using: betweenness (dat.edg) # Giving the output: [1] 4 0 3 0 0 0 0 0 3 0 Hope you can help ... many thanks, tom Thomas Rawdon, Incursion Investigator (Animals) Investigation and Diagnostic Centre | Investigation Readiness and Respon...

...#initialize table ??? #loop through files for(f in myfiles[-1]) { netMat <- read.table( f, sep" " ) netMat <-as.matrix(netMat) # calculate the needed Stats gden(netMat)->density centralization(netMat, degree) -> Gdegree centralization(netMat, betweenness) -> Gbetweenness centralization(netMat, closeness) -> Gcloseness #store into table ???? } So my questions are two First how can I initialize the table (it will be a 4 X 1001 table) without filling it out first. Second how can I store each value in the table (i.e...

Hi, I had asterisk installed, ISDN-adapter, some x-lite software-phones and I can call betweens the softphone- and 'normal' phones during the ISDN-card. 2 questions now 1) Is it posible to create policies, so that some SIP-users can dial ALL numbers, and some SIP-users not are allowed to dial eg. 900xxx-numbers, 30xxxxxx (mobilphones), 40xxxx(long distance) and if possible on time

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Dear List, I am sorry if this perhaps a too basic question, but I have not found an answer in Google or in the R help system. I am trying to use R to do a very simple analysis of some data (RT-PCR and Western analysis) with a T-test and to plot the results as a histogram with error bars. (I have pasted an example script at the bottom of this mail). In order to use this for publication, I would

...Building/Updating help pages for package 'sna' Formats: text html latex example add.isolates text html latex example bbnam text html latex example bbnam.bf text html latex example betweenness text html latex example bicomponent.dist text html latex example blockmodel text html latex example blockmodel.expand text html latex example bn text...

Hello All, I went through lot of searching for papers to do clustering on Co-Authroship.I ran SNA metrics on my Undirected Graph(betweenness,Closeness,Eigen Vector) using R. After running the sna Metrics I found important nodes and did clustering on those nodes based on Binding strength .This clustering is done through if they are connected.I would like to do clustering based on Weight of the link. Example lets say 5 nodes have publ...

Hi I am having trouble with the setup of Oblivion 1. I copied my cd into an ISO file 2. I than transferred it to my computer 3. I used the command "mkdir /mnt/oblivion" 4. I used the command "mount -o loop -t iso9660 The.Elder.Scrolls.IV.Oblivion.ISO /mnt/oblivion" (it did tell me that the information was read-only) 5. I used "cd /mnt/oblivion" 6. "ls" it

I''ve implemented jQuery UI tabs, and I get an error: When i submit a ajax form or link, it gets submitted multiple times. As seen in this Doom console output: DELETE http://localhost:3000/innmeldings/101 404 (Not Found) DELETE http://localhost:3000/innmeldings/101 404 (Not Found) DELETE http://localhost:3000/innmeldings/101 404 (Not Found) DELETE http://localhost:3000/innmeldings/101