Joining R-bloggers.com

Today I was invited by Tal Galili, to join the great www.R-bloggers.com network of R blogs. Now all my posts categorized under Statistics/R, will be automagically published to www.R-bloggers.com. In case you don’t know R-bloggers yet, I highly encourage you to visit it. It’s an amazing resource,...

Equality of Covariances Matrices Test in R (varcomp)

This is a piece of code I implemented in 2004, which was supposed to be part of an R-package in multivariate testing (to be named, rather creatively, mvttests). Time has flown, I haven’t still got around to implementing the said package, but people keep asking me for the varcomp function, so here it...

Sphericity Test for Covariance Matrices in R (sphericity.test)

This is a piece of code I implemented in 2004, which was supposed to be part of an R-package in multivariate testing (to be named, rather creatively, mvttests). Time has flown, I haven’t still got around to implementing the said package, but people keep asking me for the sphericity.test function, so...