----- Forwarded message from [email protected] ----- Date: Wed, 05 Feb 2014 22:37:11 -0800 From: [email protected] Reply-To: [email protected] Subject: RE: PCA in R vs RWA in tpsRelW To: [email protected]
----- Forwarded message from andrea cardini <[email protected]> ----- Date: Mon, 3 Feb 2014 03:09:04 -0500 From: andrea cardini <[email protected]> Reply-To: andrea cardini <[email protected]> Subject: RE: PCA in R vs RWA in tpsRelW To: [email protected] Eugenia, if you send me the data, I can try to check when I have a spare minute. The last time I played with geomorph was probably one year ago. I had compared Relw and geomorph and remember that I found no difference but I did it quickly and it was a much older version. Cheers Andrea PS The P of the Mantel test is irrelevant in this context but the r says that there are some differences in the shape distances. With exactly the same options in the two programs, this should not happen. At 05:29 01/02/2014, you wrote: >----- Forwarded message from Eugenia Gold <[email protected]> ----- > >Date: Fri, 17 Jan 2014 16:54:40 -0500 >From: Eugenia Gold <[email protected]> >Reply-To: Eugenia Gold <[email protected]> >Subject: RE: PCA in R vs RWA in tpsRelW >To: "[email protected]" <[email protected]> > >Hello everyone (again), >After trying some things, I still end up with a >different result in R and in TPS when I try to >run a PCA/RWA on sliding semilandmarks. The >dataset is identical for both. I have tried >aligning with both bending energy and with >procrustes in both programs. I ran a Mantel test >in PAST, as per a suggestion I received from my >earlier message, and got an R of 0.9784 and >p=0.5. I was wondering if anyone has encountered >this on their own data and if you have any other >potential explanations for the cause of the >difference? Thanks for any and all help! I greatly appreciate it. > >-Eugenia > >Doctoral Candidate >Richard Gilder Graduate School >American Museum of Natural History >New York, NY 10024 > > >---------- >From: [email protected] >[[email protected]] >Sent: Tuesday, January 14, 2014 5:22 PM >To: [email protected] >Subject: PCA in R vs RWA in tpsRelW > > >----- Forwarded message from Eugenia Gold <[email protected]> ----- > >Date: Tue, 14 Jan 2014 16:12:12 -0500 >From: Eugenia Gold <[email protected]> >Reply-To: Eugenia Gold <[email protected]> >Subject: PCA in R vs RWA in tpsRelW >To: "[email protected]" <[email protected]> > >Hi everyone! >I'm working on a project in which I use sliding >semilandmarks. I've run the dataset through the >tpsRelW software and through R using the >geomorph package, but I get different results >using each. I've fixed the slider file to allow >for sliding semilandmarks in geomorph. My >understanding is the RWA is equivalent to PCA, >so would there be a difference in a PC1vPC2 versus a RW1vRw2 plot? > >Thanks for the help! >-Eugenia > >M. Eugenia L. Gold >Doctoral Candidate >Richard Gilder Graduate School >Division of Paleontology >American Museum of Natural History >New York, NY 10024 > > > >----- End forwarded message ----- > > > > > >----- End forwarded message ----- > > Dr. Andrea Cardini Researcher in Animal Biology, Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, l.go S. Eufemia 19, 41121 Modena, Italy Honorary Fellow, Centre for Anatomical and Human Sciences, University of Hull, Cottingham Road, Hull, HU6 7RX, UK & University of York, Heslington, York YO10 5DD, UK Adjunct Associate Professor, Centre for Forensic Science , The University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia E-mail address: [email protected], [email protected] WEBPAGE: http://sites.google.com/site/hymsfme/drandreacardini Summary of research interests at: http://www.dscg.unimore.it/site/home/ricerca/aree-di-ricerca/evolution-taxonomy-and-forensics.html FREE Yellow BOOK on Geometric Morphometrics: http://www.italian-journal-of-mammalogy.it/issue/view/405 or full volume at: http://www.italian-journal-of-mammalogy.it/public/journals/3/issue_241_complete_100.pdf Editorial board for: Zoomorphology: http://www.springer.com/life+sciences/animal+sciences/journal/435 Journal of Zoological Systematics and Evolutionary Research: http://www.wiley.com/bw/journal.asp?ref=0947-5745&site=1 Hystrix, the Italian Journal of Mammalogy: http://www.italian-journal-of-mammalogy.it/ ----- End forwarded message ----- ----- End forwarded message -----
