Monthly Archives: November 2007

When I decided to switch from SAS to [tag]R project[/tag], it was because somebody told me that multivariate analysis and plots like [tag]heatmap[/tag] are much easier to do in R. I guess somebody should have told me what I learned … Continue reading →

The one supposedly easy thing to do in [tag]R project[/tag] was [tag]biplot[/tag]. Well, indeed it is, when you have your [tag]Principal Component Analysis[/tag] ([tag]PCA[/tag]) calculated right. Which may not necessarily be easy. Let’s start from easier function [tag]princomp[/tag]. The one … Continue reading →