Re: geomorph gpagen coordinates

Wed, 19 Mar 2014 22:08:35 -0700


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Date: Wed, 19 Mar 2014 09:46:09 -0700
From: [email protected]
Reply-To: [email protected]
Subject: Re: geomorph gpagen coordinates
To: [email protected]


----- Forwarded message from Antigoni Kaliontzopoulou <[email protected]> -----

Date: Sun, 9 Mar 2014 06:21:15 -0400
From: Antigoni Kaliontzopoulou <[email protected]>
Reply-To: Antigoni Kaliontzopoulou <[email protected]>
Subject: Re: geomorph gpagen coordinates
To: [email protected]

Hi Alejo,

in reality gpagen by default projects the specimens into tangent space (option Proj=TRUE of the function). Unless you change that option to Proj=FALSE, which does not seem like a good idea for most practical applications, the coordinates that gpagen provides are superimposed coordinates IN tangent space.

Antigoni


On Sun, Mar 9, 2014 at 5:16 AM, <[email protected]> wrote:


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Date: Wed, 05 Feb 2014 22:39:42 -0800
From: [email protected]
Reply-To: [email protected]
Subject: geomorph gpagen coordinates
To: [email protected]


----- Forwarded message from "Alejo ." <[email protected]> -----

Date: Mon, 3 Feb 2014 17:26:56 -0200
From: "Alejo ." <[email protected]>
Reply-To: "Alejo ." <[email protected]>
Subject: geomorph gpagen coordinates
To: morphmet <[email protected]>

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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--


Antigoni Kaliontzopoulou

CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos
Campus Agrário de Vairão, 4485-661 Vairão
PORTUGAL
Department of Ecology, Evolution, and Organismal Biology
Iowa State University, Ames,
Iowa 50011, USA

tel: +351 91 3086188
mail to: [email protected]
            [email protected]



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