Hi, thank you for your answer, I didn't write the whole matrix in the table just for semplication, but it is a square matrix. So everything should be fine right?
thank you! 2013/5/3 Tamás Nepusz <[email protected]> > Hi, > > > Import the txt file which looks as following (The first row specifies > the code for the different nodes, the other rows specifies the weights of > edges). > How come that your input file is not a square matrix? It seems to have 8 > rows and 13 columns -- where are the 5 missing rows and the 5 missing node > names? > > Otherwise what you do seems okay for me. > > > IS it ok for igraph to have the name of the nodes just in the first row > and not in the first column to generate an adjacency matrix? i have read > somewhere it is the same as having the first column with 'A','B','C',etc > igraph doesn't care -- it does not read your file, it reads the matrix > that you loaded with read.table. If the matrix looks fine in R, then it > should be okay for igraph as well. > > > I want then to calculate the betweenness, that will return a result for > each node, but I am not sure whether the weights are inserted correctly in > the function. > Seems okay for me, assuming that your input matrix is correct -- which is > still a bit weird for me because of the missing rows. > > > Is there a way I can check the results using other programs? > Of course -- find another program that can calculate weighted betweenness > scores and compare the results ;) One possible option is the NetworkX > module for Python if you know the Python language. (igraph also has a > Python interface but it would be quite useless to compare igraph in Python > vs igraph in R because they use the same implementation). > > -- > T. > _______________________________________________ > igraph-help mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/igraph-help >
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