-------- Original Message -------- Subject: RE: scaling eigenvectors according to 1/SQRT of eigenvalues Date: Wed, 14 Mar 2012 18:23:48 -0400 From: F. James Rohlf <[email protected]> Reply-To: <[email protected]> Organization: Stony Brook University To: <[email protected]> That simply gives you the scaled eigenvectors of the inverse of the covariance matrix. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - F. James Rohlf, John S. Toll Professor, Stony Brook University The much revised 4th editions of Biometry and Statistical Tables are now available: http://www.whfreeman.com/Catalog/product/biometry-fourthedition-sokal http://www.whfreeman.com/Catalog/product/statisticaltables-fourthedition-roh lf
-----Original Message----- From: morphmet [mailto:[email protected]] Sent: Tuesday, March 13, 2012 9:11 AM To: morphmet Subject: scaling eigenvectors according to 1/SQRT of eigenvalues -------- 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#meta data 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/
