[R] booklet on principal component analysis and linear discriminant analysis

Dear all, I've written a short booklet on how to use R for multivariate analysis, focussing on principal component analysis and linear discriminant analysis: http://little-book-of-r-for-multivariate-analysis.readthedocs.org/ Any comments or corrections will be very welcome. By the way, this has

[R] within-groups variance and between-groups variance

Hello, I have been looking for functions for calculating the within-groups variance and between-groups variance, for the case where you have several numerical variables describing samples from a number of groups. I didn't find such functions in R, so wrote my own versions myself (see below). I ca

[R] sdev value returned by princomp function (used for PCA)

Dear all, I have a question about the 'sdev' value returned by the princomp function (which does principal components analysis). On the help page for princomp it says 'sdev' is 'the standard deviations of the principal components'. However, when I calculate the principal components for the US

[R] booklet on using R for time series analysis

Dear all, I've written a small booklet on using R for time series analysis, available here : http://a-little-book-of-r-for-time-series.readthedocs.org/ It is just a little booklet for beginners like myself (I am studying Stats,

[R] booklet on using R for biomedical statistics

Dear all, I've written a small booklet on using R for biomedical statistics (mostly focussed on cohort and case-control studies), available here under a Creative Commons Attribution 3.0 License : "A Little Book of R for Biomedical Statistics" http://a-little-book-of-r-for-biomedi