Tools for evaluating collinearity "perturb" evaluates collinearity by adding random noise to selected variables. "colldiag" calculates condition numbers and variance decomposition proportions to test for collinearity and uncover its sources. Software Suggests: car, rms John Hendrickx <John_Hendrickx@yahoo.com> John Hendrickx GPL (>= 2) 2012-02-19 application/tgz http://CRAN.R-project.org/package=perturb