Re: (non) Missing data problem in GeoMorph

morphmet_moderator Sun, 23 Mar 2014 01:03:59 -0700

----- Forwarded message from [email protected] -----

Date: Fri, 21 Mar 2014 20:35:15 -0700
From: [email protected]
Reply-To: [email protected]
Subject: Re: (non) Missing data problem in GeoMorph
To: [email protected]

----- Forwarded message from David Katz <[email protected]> -----

Date: Wed, 12 Mar 2014 11:14:07 -0400
From: David Katz <[email protected]>
Reply-To: David Katz <[email protected]>
Subject: Re: (non) Missing data problem in GeoMorph
To: "[email protected]" <[email protected]>

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, <[email protected]> wrote:

----- Forwarded message from Leandro Aristide <[email protected]> -----

Date: Thu, 6 Feb 2014 13:02:26 -0500
From: Leandro Aristide <[email protected]>
Reply-To: Leandro Aristide <[email protected]>
Subject: (non) Missing data problem in GeoMorph
To: [email protected]

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 -----

Re: (non) Missing data problem in GeoMorph

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