----- Forwarded message from morphmet_modera...@morphometrics.org -----
Date: Thu, 19 Jun 2014 21:10:19 -0700
From: morphmet_modera...@morphometrics.org
Reply-To: morphmet_modera...@morphometrics.org
Subject: Re: landmark configuration reflection
To: morphmet@morphometrics.org
----- Forwarded message from andrea cardini <alcard...@gmail.com> -----
Date: Tue, 17 Jun 2014 02:38:19 -0400
From: andrea cardini <alcard...@gmail.com>
Reply-To: andrea cardini <alcard...@gmail.com>
Subject: Re: landmark configuration reflection
To: morphmet@morphometrics.org, morphmet@morphometrics.org
Not sure if I had replied yet. If so, my apologies for re-replying.
We wrote a mini-tutorial about how to do this
'exploiting' some of the options of the old Morpheus et al.:
Cardini A., Diniz Filho J. A. F., Polly P. D.,
Elton S., 2010 -
<http://docs.google.com/fileview?id=0B7MW9En7Pb3VYWQ5NWM3YzktOGU3Ny00YTE1LTg3YTYtZmFjOGNmZDVmZGIx&hl=en_GB>Biogeographic
analysis using geometric morphometrics: clines in
skull size and shape in a widespread African
arboreal monkey. A. M. T. Elewa (Ed.),
Morphometrics for Nonmorphometricians, Lecture
Notes in Earth Sciences 124, Springer-Verlag
Publishers, Heidelberg, Germany. DOI 10.1007/978-3-540-95853-6_8.
For 2D data it's even easier using a baseline
superimposition (and then rescaling back the
specimens) as an intermediate step. I don't think
I wrote somewhere how to do it step by step by,
again, it can be done in both PAST and Morpheus with a tiny bit of effort.
Contrary to something (inaccurate) I may have
written in older papers, I would do all analyses
using the 'symmetrized' left side (or right side,
whatever ...) after removing small asymmetries on
the midplane (assuming one is not working on
dolphins or the like and asymmetries are really
small). One gets a better superimposition where
midplane landmarks cannot be off the midplane (as
it happens using just one side). Data contains
redundant info but that can be dealt with either
using PCs with non-zero eigenvalues or using resampling methods for testing.
Cheers
Andrea
At 21:50 13/06/2014, morphmet_modera...@morphometrics.org wrote:
>----- Forwarded message from Carmelo Fruciano <c.fruci...@unict.it> -----
>
> Date: Tue, 10 Jun 2014 04:01:02 -0400
> From: Carmelo Fruciano <c.fruci...@unict.it>
> Reply-To: Carmelo Fruciano <c.fruci...@unict.it>
> Subject: Re: landmark configuration reflection
> To: morphmet@morphometrics.org
>
>morphmet_modera...@morphometrics.org ha scritto:
>
> >
> > ----- Forwarded message from Miguel Eduardo Delgado Burbano -----
> >
> > Date: Thu, 5 Jun 2014 17:59:15 -0300
> > From: Miguel Eduardo Delgado Burbano
> > Reply-To: Miguel Eduardo Delgado Burbano
> > Subject: landmark configuration reflection
> > To: morphmet_modera...@morphometrics.org
> >
> > Hi all
> >
> > I am performing a 2D geometric morphometric study using human
> > skulls. In a previous research I digitized several landmarks and
> > semilandmarks in the right half of the face, but now I am trying to
> > perform an analysis using the complete face (i.e both halfs), so in
> > order to not digitized again perhaps I can reflect the right
> > landmark configuration on the left side. Since the reflection is
> > performed during the procrustes (GPA) perhaps a particular software
> > allows to reflect the landmark configuration  TPS, MorphoJ, GeoMorph
> > etc??Â
> >
> > Â Â any suggestions?
>
>Hi Miguel,
>Normally these days when I have to do these reflections I use Matlab.
>For an older paper (Fruciano et al. 2011 - It J Zool) I think I used
>LMedit from the IMP package (it's been a while now).
>However, if your data is only on half of the face, I would perform the
>analysis only on half the face and then use reflection across a
>symmetry axis only to display the results...
>Best,
>Carmelo
>
>--
>Carmelo Fruciano
>Marie Curie Fellow - University of Konstanz - Konstanz, Germany
>Honorary Fellow - University of Catania - Catania, Italy
>e-mail c.fruci...@unict.it
>http://www.fruciano.it/research/
>
>----- End forwarded message -----
Dr. Andrea Cardini
Researcher in Animal Biology, Dipartimento di
Scienze Chimiche e Geologiche, Università di
Modena e Reggio Emilia, l.go S. Eufemia 19, 41121 Modena, Italy
Adjunct Associate Professor, Centre for Forensic
Science , The University of Western Australia, 35
Stirling Highway, Crawley WA 6009, Australia
E-mail address: alcard...@gmail.com, andrea.card...@unimore.it
WEBPAGE: http://sites.google.com/site/hymsfme/drandreacardini
Summary of research interests at:
http://www.dscg.unimore.it/site/home/ricerca/aree-di-ricerca/evolution-taxonomy-and-forensics.html
FREE Yellow BOOK on Geometric Morphometrics:
http://www.italian-journal-of-mammalogy.it/issue/view/405
or full volume at:
http://www.italian-journal-of-mammalogy.it/public/journals/3/issue_241_complete_100.pdf
Editorial board for:
Zoomorphology:
http://www.springer.com/life+sciences/animal+sciences/journal/435
Journal of Zoological Systematics and
Evolutionary Research: http://www.wiley.com/bw/journal.asp?ref=0947-5745&site=1
Hystrix, the Italian Journal of
Mammalogy: http://www.italian-journal-of-mammalogy.it/
----- End forwarded message -----
----- End forwarded message -----
