----- Forwarded message from Philipp Mitteröcker <mitte...@univie.ac.at> -----
Date: Mon, 25 Nov 2013 06:19:16 -0500
From: Philipp Mitteröcker <mitte...@univie.ac.at>
Reply-To: Philipp Mitteröcker <mitte...@univie.ac.at>
Subject: Re: missing structures
To: morphmet@morphometrics.org
This is a more fundamental problem that cannot be solved properly by letting
landmarks overlap.
The "hidden landmarks" still have coordinates that affect the statistics and
the deformation grids.
One approach, maybe not the most satisfactory though, is to conduct separate
analyses for the datasets that do have the same number of variables. In Frelat
& Mitteroecker (2011) we tried to combine such separate analyses. See also
Mitteroecker & Huttegger (2009) for a more general discussion of the analysis
of both quantitative and qualitative differences.
Frelat MA, Mitteroecker P (2011) Postnatal ontogeny of tibia and femur form in
two human populations: A multivariate morphometric analysis. American Journal
of Human Biology 23, 796–804
Mitteroecker P, Huttegger S (2009) The Concept of Morphospaces in Evolutionary
and Developmental Biology: Mathematics and Metaphors. Biological Theory 4(1),
54–67
Best,
Philipp
Am 24.11.2013 um 08:07 schrieb morphmet_modera...@morphometrics.org:
>
> ----- Forwarded message from carlo.mel...@unina.it -----
>
> Date: Mon, 18 Nov 2013 09:34:38 -0500
> From: carlo.mel...@unina.it
> Reply-To: carlo.mel...@unina.it
> Subject: Re: missing structures
> To: morphmet@morphometrics.org
>
> Dear Patrick,
>
> you can probably let your missing landmarks overlap with existing ones
> if you think that the structure simply disappeared because of function.
>
> All the best
>
> Carlo
>
> Quoting morphmet_modera...@morphometrics.org:
>
>>
>> ----- Forwarded message from Patrick Arnold
>> <patrick.arn...@uni-jena.de> -----
>>
>> Date: Wed, 13 Nov 2013 04:48:42 -0500
>> From: Patrick Arnold <patrick.arn...@uni-jena.de>
>> Reply-To: Patrick Arnold <patrick.arn...@uni-jena.de>
>> Subject: missing structures
>> To: morphmet@morphometrics.org
>>
>> Dear all,
>>
>> I am examining different vertebrae with GMM. Unfurtunatly in one group
>> of vertebrae (C7) some structures are lacking which are very distinct
>> in all the other groups of vertebrae, thus being very good landmark
>> locations. The structure are definetly missing in C7 because they do
>> not appear in ontogeny (No Tuberculum ventralis because no costal
>> primordium and no Foramen transversum). My problem is now, how to deal
>> with missing structure because I do not want to exclude this landmarks
>> because they are so nice landmarks in all the other vertebrae. Is
>> their any solution in the workflow?
>>
>> Thanks for answering.
>>
>> Patrick Arnold
>> Institute for Systematic Zoology and Evolutionary Biology
>> Friedrich-Schiller-Universität Jena
>> Germany
>>
>> ----------------------------------------------------------------
>> This message was sent through https://webmail.uni-jena.de
>>
>> ----- End forwarded message -----
>>
>>
>>
>>
>
> ----- End forwarded message -----
>
>
___________________________________
Dr. Philipp Mitteroecker
Department of Theoretical Biology
University of Vienna
Althanstrasse 14
A-1090 Vienna, Austria
Tel: +43 1 4277 56705
Fax: +43 1 4277 9544
email: philipp.mitteroec...@univie.ac.at
homepage: http://theoretical.univie.ac.at/people/mitteroecker
----- End forwarded message -----
