----- Forwarded message from al cardini -----
Date: Sat, 6 Oct 2012 03:54:46 -0400
From: al cardini
Reply-To: al cardini
Subject: Re: MorphoJ question
To: [email protected]
Dear Daniela,
although there will be a (probably negligible) difference in the kind
of information you're using when you compare your original symmetric
dataset to your additional dataset with just one side, I'd do the
opposite: instead of removing one side from the original dataset, you
mirror the paired landmarks of the 'one-side-only' configuration and
remove the small asymmetries on the midplane. This way you will get
mirror-reflected one-side-only configurations that you can use with
your old data (where, I guess, you were only using the symmetric
component). Working with 'symmetrized' half skulls, when one hasn't
got a chance to get both sides (which would be better but takes more
time), is also likely to have an advantage in terms of superimposition
(landmarks on the midplane are constrained to be in the midplane and
can't go off it) and certainly in terms of visualization (much nicer
with the entire skull).
We might have written something about how to do it using xls +
Morpheus. Maybe give a look at Cardini et al., 2010 (with Elton,
Polly, Diniz-Filho), book chapter on biogeography. There's should be a
pdf in my webpage (publication section).
Good luck
Andrea
On 5 October 2012 21:13, <[email protected]> wrote:
>
> ----- Forwarded message from Daniela Sanfelice -----
>
> Date: Thu, 4 Oct 2012 10:54:42 -0400
> From: Daniela Sanfelice
> Reply-To: Daniela Sanfelice
> Subject: MorphoJ question
> To: [email protected]
>
> Hey dear morphometricians!
>
> To improve my samples size, I will recalculate all my projects and results
> about morphological integration in pinnipeds skulls using just one skull
> side.
>
> So... no more object symmetry! However, superposition was done considering
> object symmetry...
>
> Can I just exclude the landmarks anyway, and after include the new specimens
> (with only the left side information)?
>
> I suppose not... but if I can´t do this way, how can I do it?
>
> Should I exclude the landmarks from all the raw data file by hand or there
> is another easier way?
>
> Many thanks for your help and contributions!
>
> Cheers, Daniela Sanfelice.
>
>
>
> ----- 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
Honorary Fellow
Functional Morphology and Evolution Unit, Hull York Medical School
University of Hull, Cottingham Road, Hull, HU6 7RX, UK
University of York, Heslington, York YO10 5DD, UK
Adjunct Associate Professor
Centre for Forensic Science , The University of Western Australia
35 Stirling Highway, Crawley WA 6009, Australia
E-mail address: [email protected], [email protected],
[email protected], [email protected]
Webpage: http://sites.google.com/site/hymsfme/drandreacardini
Datasets:
http://ads.ahds.ac.uk/catalogue/archive/cerco_lt_2007/overview.cfm#metadata
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 -----
