RE: geomorph gpagen coordinates

[morphmet_moderator]

----- Forwarded message from "Adams, Dean [EEOBS]" <dcad...@iastate.edu> -----

Date: Sun, 9 Mar 2014 13:01:42 -0400
From: "Adams, Dean [EEOBS]" <dcad...@iastate.edu>
Reply-To: "Adams, Dean [EEOBS]" <dcad...@iastate.edu>
Subject: RE: geomorph gpagen coordinates
To: "morphmet@morphometrics.org" <morphmet@morphometrics.org>

Alejo,

The default in gpagen() aligns the coordinates and then projects into Tangent space. Thus they are Procrustes Tangent coordinates (see help file).  One can disable the projection step using the option Proj=FALSE.

Dean

--
Dr. Dean C. Adams
Professor
Department of Ecology, Evolution, and Organismal Biology
Department of Statistics
Iowa State University
Ames, Iowa
50011
www.public.iastate.edu/~dcadams/
phone: 515-294-3834

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From: morphmet_modera...@morphometrics.org [morphmet_modera...@morphometrics.org]
Sent: Saturday, March 08, 2014 11:16 PM
To: morphmet@morphometrics.org
Subject: geomorph gpagen coordinates

----- Forwarded message from morphmet_modera...@morphometrics.org -----

Date: Wed, 05 Feb 2014 22:39:42 -0800
From: morphmet_modera...@morphometrics.org
Reply-To: morphmet_modera...@morphometrics.org
Subject: geomorph gpagen coordinates
To: morphmet@morphometrics.org

----- Forwarded message from "Alejo ." <alejo.c.scar...@gmail.com> -----

Date: Mon, 3 Feb 2014 17:26:56 -0200
From: "Alejo ." <alejo.c.scar...@gmail.com>
Reply-To: "Alejo ." <alejo.c.scar...@gmail.com>
Subject: geomorph gpagen coordinates
To: morphmet <morphmet_modera...@morphometrics.org>

Hi all, first thanks for a so useful package! I have a question about "gpagen". I understand that the resulting coordinates of this command are in shape space, so for statistical analisys one must project them to tangent space. But the command "plotTangetSpace" runs "prcomp" directly over gpagen's coordinates. The gpagen's resulting coordinates are already on tangent space? Thanks a lot in advance

Alejo

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