Re: (non) Missing data problem in GeoMorph

[morphmet_moderator]

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

Date: Fri, 21 Mar 2014 20:35:15 -0700
From: morphmet_modera...@morphometrics.org
Reply-To: morphmet_modera...@morphometrics.org
Subject: Re: (non) Missing data problem in GeoMorph
To: morphmet@morphometrics.org

----- Forwarded message from David Katz <dck...@ucdavis.edu> -----

Date: Wed, 12 Mar 2014 11:14:07 -0400
From: David Katz <dck...@ucdavis.edu>
Reply-To: David Katz <dck...@ucdavis.edu>
Subject: Re: (non) Missing data problem in GeoMorph
To: "morphmet@morphometrics.org" <morphmet@morphometrics.org>

I assume gpagen is reading for 999 values prior to translation, rotation, etc.... So why not translate everything far away from 999 by adding an obscenely large value (eg 10000) to all coordinates of all specimens before submitting the matrix to gpagen? 

On Wednesday, March 12, 2014, <morphmet_modera...@morphometrics.org> wrote:

----- Forwarded message from Leandro Aristide <leandroari...@gmail.com> -----

Date: Thu, 6 Feb 2014 13:02:26 -0500
From: Leandro Aristide <leandroari...@gmail.com>
Reply-To: Leandro Aristide <leandroari...@gmail.com>
Subject: (non) Missing data problem in GeoMorph
To: morphmet@morphometrics.org

Hi all!

I'm working with geomorph to perform a GPA including landmarks and surface semilandmarks in 3D. Unfortunately, some of the specimens include a few coordinate values of -999.xxx, which are interpreted by the gpagen function as missing values:

if (length(grep("-999", A)) != 0) {
        stop("Data matrix contains missing values. Estimate these first(see 'estimate.missing').")
    }

does anyone have an idea on how to circumvent this?

thanks!

Leandro

--

Lic. Leandro Arístide

Biólogo

División Antropología - Museo de La Plata
Facultad de Ciencias Naturales y Museo - Universidad de La Plata
CONICET
http://www.evomorfologica.com.ar/

----- End forwarded message -----

--
David Katz
Doctoral Candidate
Department of Anthropology--Evolutionary Wing
University of California, Davis
Young Hall 204

----- End forwarded message -----

----- End forwarded message -----