The help for prcomp on R 1.0.0 states that the component sdev of the return value is the eigenvalues of the cov matrix. Am I completely mistaken, or should this be the _square root_ of the eigenvalues? Also, the documentation is not very clear about how tol is used to omit components. (The _code_ is clear, though. :-) -- B/H -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Peter Dalgaard BSA
2000-Jun-14 12:36 UTC
[Rd] Typo in the documentation of prcomp. (PR#569)
bhm@math.uio.no writes:> The help for prcomp on R 1.0.0 states that the component sdev of the > return value is the eigenvalues of the cov matrix. Am I completely > mistaken, or should this be the _square root_ of the eigenvalues?Yup. Will fix for 1.1.0> Also, the documentation is not very clear about how tol is used to omit > components. (The _code_ is clear, though. :-)Hmm. Can't think of a concise way of saying this. Hardly something that needs fixing here and now. -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk) FAX: (+45) 35327907 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Prof Brian Ripley
2000-Jun-14 13:05 UTC
[Rd] Typo in the documentation of prcomp. (PR#569)
> From: Peter Dalgaard BSA <p.dalgaard@biostat.ku.dk> > Date: 14 Jun 2000 14:36:13 +0200 > > bhm@math.uio.no writes: > > > The help for prcomp on R 1.0.0 states that the component sdev of the > > return value is the eigenvalues of the cov matrix. Am I completely > > mistaken, or should this be the _square root_ of the eigenvalues? > > Yup. Will fix for 1.1.0I've just fixed rather a lot of typos ....> > Also, the documentation is not very clear about how tol is used to omit > > components. (The _code_ is clear, though. :-) > > Hmm. Can't think of a concise way of saying this. Hardly something > that needs fixing here and now.I think I have found a way .... -- Brian D. Ripley, ripley@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._