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I am trying to study the social network of the center where I am working. I have done a compilation of relation between personal from programed meeting, formal working team, etc. to analyze structural relevant positions. I recapitulated all these information in a matrix of incidence: a square symmetric matrix which entries are related with the time two persons stay together. This matrix is in Excel.

I am looking for free software which draws a graph from the incidence matrix via importation of Excel file.

Any help?

Thank you in advance

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    Yup, looks like R will do it. I've added an answer with links to it and the necessary package.2012-06-02

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So it looks like R can generated the graph youre looking for via graph.incidence in the igraph package, which can be found in CRAN. To get the incidence matrix, you can just do:

x=read.csv("C:/yourfilenale.csv") matrix.pickaname <- as.matrix(x) 

Though, it seems that this solution only works if the .csv is only the data, no headers. If you still have string values in the file, it gets imported as a data.frame.

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    The documentation I linked indicates it takes an incidence matrix. This isn't exactly my area though, so I can't attest to it. R is free though, and very effective so I'd give it a shot.2012-06-02