Re: [R] principle component values on PCA plots do not match

2014-08-19 Thread David L Carlson
Try using scale=0 with the biplot function). David C -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Jinsong Zhao Sent: Monday, August 18, 2014 7:42 PM To: r-help@r-project.org Subject: Re: [R] principle component values on PCA

Re: [R] principle component values on PCA plots do not match

2014-08-18 Thread Jinsong Zhao
Hi, There is a scale factor associated with biplot when plotting the PCA result. Please read the help page of biplot.princomp or/and the source code of this function. HIH, Jinsong On 2014/8/18 16:31, John Romansic wrote: Hi all, I am using prcomp to do Principle Components Analysis and hav

[R] principle component values on PCA plots do not match

2014-08-18 Thread John Romansic
Hi all, I am using prcomp to do Principle Components Analysis and have run into a problem regarding the scale of the axes on my plots. I am using prcomp to analyze a set of 25 morphological measurements taken on each of 161 individual frogs. I used the biplot function to produce a figure of PC1 v