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qgraph (version 1.9.2)

wi2net: Converts precision matrix to partial correlation matrix

Description

A small function that converts a precision matrix (inverse of covariance matrix) to a partial correlatin matrix. This can be done by standardizing the precision matrix and changing the sign of the offdiagonal entries. Many methods exist for obtaining a precision matrix (Such as the glasso package; Friedman, Hastie and Tibshirani, 2011) but the partial correlation matrix is easier interpretable and better usuable in qgraph.

Usage

wi2net(x)

Value

A partial correlation matrix

Arguments

x

A precision matrix

Author

Sacha Epskamp <mail@sachaepskamp.com>

References

Jerome Friedman, Trevor Hastie and Rob Tibshirani (2011). glasso: Graphical lasso-estimation of Gaussian graphical models. R package version 1.7. http://CRAN.R-project.org/package=glasso