Usually, PCA is used for a large number of features. FactoMineR [1] package provides a couple of examples, check for temperature example. But you may want to consult to basic PCA material as well, I suggest a book from Chris Bishop [2].
[1] https://cran.r-project.org/web/packages/FactoMineR/vignettes/clustering.pdf [2] http://www.springer.com/de/book/9780387310732?referer=www.springer.de ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
