Please read ?princomp to understand more about loadings and their arbitrary signs.
On Tue, 22 Nov 2005, Roy Little wrote: > Dear list, > I have a question concerning the above mentioned methods in the pls > package with respect to the loadings matrix produced by the call. In > some work I am doing I have found that the values produced are nearly of > the same magnitude but of opposite sign. When I use the example data > (sensory) I find this result reproduced. I am prepared to work this > through but I have a feeling that there could be a possible error in the > code. (?!) > > > > > sens.pcr$loadings > Comp 1 Comp 2 Comp 3 Comp 4 > yellow 75.186621 -0.4780473 3.212149 1.750123 > green -90.490256 8.5880530 1.634961 1.042239 > brown -2.861241 -11.3600509 -15.920789 -1.105799 > glossy 13.347090 19.3103902 -3.121693 2.781282 > transp 20.126987 24.0653312 -6.656764 -1.842907 > syrup -7.199972 -5.3436196 -5.073675 5.620454 > > sens.pls$loadings > > Loadings: > Comp 1 Comp 2 Comp 3 Comp 4 > yellow -74.448 -10.519 3.169 -1.056 > green 88.299 21.627 -0.521 -0.976 > brown 4.959 -14.253 -12.761 -0.371 > glossy -15.798 15.914 -7.574 3.504 > transp -23.049 18.673 -12.214 -2.068 > syrup 8.045 -5.313 -3.698 2.181 > > Thank you for your help. -- Brian D. Ripley, [EMAIL PROTECTED] 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 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
