thank you Gabor, I don't understand the difference between weights=NULL and weights =TRUE then when I create a graph object.
Can you pls explain? Thank you very much Marko Il giorno 13/mag/2013, alle ore 02:51, Gábor Csárdi <[email protected]> ha scritto: > Hi, > > weights = NULL means that the weights will be used if they are present. > You'll need to remove them, or set all of them to 1 if you want to ignore > them. > > Gabor > > > On Sun, May 12, 2013 at 6:27 PM, Antoniazzi Marco > <[email protected]> wrote: > Hi all, > > I have two matrices which look as following: > > Matrix A: 14*14 with weighted edges. > > Matrix B: 14*14 where I changed all the weighted edges with 1. > > I wanted to check whether igraph results are correct but I can't figure out > the explanations to the following problem: > > GraphA <- graph.adjacency(MatrixA, mode=c("directed"),weighted = NULL ) > Betweenness <- betweenness ( GraphA, directed = TRUE, > weights = NULL, normalized=TRUE) > > GraphB <- graph.adjacency(MatrixB, mode=c("directed"), weighted= NULL) > BetweennessN <- betweenness ( GraphB, directed = TRUE, > weights = NULL, normalized=TRUE) > > from which I should get exactly the same results as I specify weighted=NULL > but indeed the results are different one from the other. > I have tried to remove 'normalized' argument to see whether it is biased but > I get different results as well... > > Any thoughts? > > Thank you very much for your help!! > Marko > _______________________________________________ > igraph-help mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/igraph-help > > > > -- > Gabor Csardi <[email protected]> MTA KFKI RMKI > _______________________________________________ > igraph-help mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/igraph-help
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