-------- Original Message -------- Subject: Re: scaling eigenvectors according to 1/SQRT of eigenvalues Date: Thu, 15 Mar 2012 08:13:45 -0400 From: Stefan Schlager <[email protected]> To: [email protected] Dear Andrea, by using the scaled eigenvectors to project the data into PC-space, you will simply get PC-scores scaled to unit variance. Greetings Stefan Stefan Schlager M.A. Anthropologie Medizinische Fakultät der der Albert Ludwigs- Universität Freiburg Hebelstr. 29 79104 Freiburg Anthropology Faculty of Medicine, Albert-Ludwigs-University Freiburg Hebelstr. 29 D- 79104 Freiburg phone +49 (0)761 203-5522 fax +49 (0)761 203-6898 On 13/03/12 20:10, morphmet wrote:
-------- Original Message -------- Subject: scaling eigenvectors according to 1/SQRT of eigenvalues Date: Tue, 13 Mar 2012 12:01:45 -0400 From: andrea cardini <[email protected]> To: [email protected] Dear morphometricians, please, has anyone got any experience of PCAs where eigenvectors are scaled according to 1/SQRT of eigenvalues? What's the aim and typical use? Any introductory reference? Thanks in advance for your help. Cheers Andrea Dr. Andrea Cardini Researcher in Animal Biology Dipartimento di Biologia, Universitá di Modena e Reggio Emilia, via Campi 213, 41100, Modena, Italy tel: 0039 059 2055017 ; fax: 0039 059 2055548 Honorary Fellow Functional Morphology and Evolution Unit, Hull York Medical School 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], [email protected], [email protected] Webpage: http://sites.google.com/site/hymsfme/drandreacardini Datasets: http://ads.ahds.ac.uk/catalogue/archive/cerco_lt_2007/overview.cfm#metadata 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/
