Weighted network visualization and analysis, as well as Gaussian graphical model computation. See Epskamp et al. (2012)
This is the developmental version of qgraph. For the stable version please see the CRAN link to the package: http://cran.r-project.org/web/packages/qgraph/index.html For more information, please see the publication in Journal of Statistical Software: http://www.jstatsoft.org/v48/i04/