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Hi, I have optimized the shrinkage parameter (GCV)for ridge and got my r2 value is 70% . to check the sensitivity of the result, I did permutation test. I permuted the response vector and run for 1000 times and draw a distribution. But now, I get r2 values highest 98% and some of them more than 70 %. Is it expected from such type of test? *I was under impression that, r2 with real data set

I want learn permutation test and resampleing, etc. There are a few references listed below. I'm wondering what is the best book on this topic. Can somebody give me some advice. Thank you! http://en.wikipedia.org/wiki/Resampling_%28statistics%29#Permutation_test

CRAN (and crantastic) updates this week New packages ------------ * EffectStars (1.0) Maintainer: Unknown Author(s): Gunther Schauberger License: GPL-2 http://crantastic.org/packages/EffectStars The package provides functions to visualize regression models with categorical response. The effects of the covariates are plotted with star plots in order to allow for an optical

...nca. The package also includes routines for the simulation of the bivariate, p-generalized uniform distribution on the p-generalized unit circle and the simulation of the corresponding angular distribution. * RcmdrPlugin.SCDA (0.0) Maintainer: Isis Bulte Author(s): Isis Bulte and Patrick Onghena License: GPL (>= 2) http://crantastic.org/packages/RcmdrPlugin-SCDA This package provides a GUI for the SCVA, SCRT and SCMA packages. It is written as an Rcmdr plugin. * ri (0.9) Maintainer: Cyrus Samii Author(s): Peter M. Aronow <peter.aronow at yale.edu> and Cyrus Samii...