Provides a general framework for highdimensional undirected graph estimation. It integrates data preprocessing, neighborhood screening, graph estimation, and model selection techniques into a pipeline. In preprocessing stage, the nonparanormal(npn) transformation is applied to help relax the normality assumption. In the graph estimation stage, the graph structure is estimated by MeinshausenBuhlmann graph estimation or the graphical lasso, and both methods can be further accelerated by the lossy screening rule preselecting the neighborhood of each variable by correlation thresholding. We target on highdimensional data analysis usually d >> n, and the computation is memoryoptimized using the sparse matrix output. We also provide a computationally efficient approach, correlation thresholding graph estimation. Three regularization/thresholding parameter selection methods are included in this package: (1)stability approach for regularization selection (2) rotation information criterion (3) extended Bayesian information criterion which is only available for the graphical lasso.
Package details 


Author  Tuo Zhao, Xingguo Li, Han Liu, Kathryn Roeder, John Lafferty, Larry Wasserman 
Date of publication  20150916 10:05:23 
Maintainer  Tuo Zhao <tzhao5@jhu.edu> 
License  GPL2 
Version  1.2.7 
Package repository  View on CRAN 
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