-------- Original Message -------- Subject: Re: ProcGPA in R Date: Thu, 4 Dec 2008 06:47:50 -0800 (PST) From: Ian Dryden <[EMAIL PROTECTED]> To: [email protected] References: <[EMAIL PROTECTED]> If using procGPA() in R with the default options then it carries out Generalized Procrustes Analysis with translation, rotation and scaling. The registered configurations are scaled relatively to each other, but the overall size is arbitrary. If you want to retain the original sizes then use procGPA() with option scale=FALSE. see help(procGPA) for full details. To check on the centroid size of a configuration X you can use centroid.size(X) Regards, Ian Dryden morphmet wrote:
-------- Original Message -------- Subject: ProcGPA in R Date: Wed, 3 Dec 2008 12:07:03 -0800 (PST) From: Murat Maga <[EMAIL PROTECTED]> To: [email protected] References: <[EMAIL PROTECTED]> Hi, I am using procGPA module in R for 3D landmark analysis. Does anyone know of its internal workings of this code? The output for the rotated data is in the original units. After the rotation, scaling and alignment, does it scale it back using the centroid sizes? Also, is there any program out there which would do the outline analysis on a 3D surface model? Thanks, M
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