search for: betweenness

Displaying 20 results from an estimated 29 matches for "betweenness".

2008 Jul 18
1
Calculating Betweenness - Efficiency problem
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...
2008 Mar 05
4
vertex labels in igraph from adjacency matrix
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...
2004 Jun 11
6
phone calls betweens phones behind the same nat
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.
2009 Mar 25
1
Weighted Graph Link strength ( I am making mistake please help)
...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...
2013 Mar 27
1
Samba4 issue: roaming profile mismatch betweens W2k/XP machines due to enabled o
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
2008 Feb 20
0
igraph package, version 0.5
...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...
2008 Feb 20
0
igraph package, version 0.5
...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...
2006 Mar 01
2
Weighted networks and multigraphs
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...
2012 Jun 18
0
igraph 0.6 released
...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...
2012 Jun 18
0
igraph 0.6 released
...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...
2009 Dec 07
1
igraph plot - vertex colors
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
2011 May 23
0
SNA query
...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...
2006 Jun 29
1
initializing table and filling it out
...#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...
2004 Jan 06
3
Policies - deny some nubers
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
2004 Aug 06
2
install instructions for iceS on i.cantcode.com
www.spacialaudio.com - take a look at SAM.. Bryan ----- Original Message ----- From: "Rick Wilson" <colly@undernetlinux.com> To: <icecast@xiph.org> Sent: Tuesday, August 14, 2001 8:21 PM Subject: Re: [icecast] install instructions for iceS on i.cantcode.com > > Hey ya all , > > I am just wondering , if anyone knows of WebSite scripts for ICECAST < that >
2005 Oct 24
1
Basic: setting resolution and size of an R graphic
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
2009 Jul 14
1
Error installing package sna
...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...
2009 Mar 05
0
Undirected to Directed Graph ( Clustering Based on Link Strength)
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...
2011 Aug 26
1
Oblivion -5006
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
2011 Mar 22
0
Error on ajax forms/links in jQuery UI tabs
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