-------- Original Message --------
Subject: Re: predicting selection response - thanks
Date: Fri, 25 Mar 2011 15:42:11 -0400
From: Dennis E. Slice <[email protected]>
To: [email protected]
On 3/25/11 3:35 PM, morphmet wrote:
-------- Original Message --------
Subject: Re: predicting selection response - thanks
Date: Fri, 25 Mar 2011 15:08:17 -0400
From: Mercedes Okumura <[email protected]>
To: [email protected]
Dear morphometricians
I am currently working with archaeological projectile points from
Southern Brazil, trying to figure out how size and shape change
according to chronology and region.
How do I use landmarks together with semilandmarks? I want to use
landmarks (which are "homologous" among points: tip, shoulder, base,
etc) and insert a specific number of semilandmarks between these
landmarks (let´s say, 30 semiLM between the tip and the shoulder, etc).
I have tried to combine these on TPSDig, but the final file comes up
with nothing (LM=0). I have successfully used LM and semiLM in separated
analysis (using TPSDig), but putting them together has been a problem.
If I understand correctly, you need to realize that semilandmarks are a
type of landmark in the eyes of morphometrics. The autosampling features
of tpsDig, I think, produce curve points, not landmarks. If I am
remembering correctly, you need to set the landmarks by hand. In later
analyses you specify which you want to slide and how via "sliders" files
you can construct via tpsUtil.
Also, the alpha version of Morpheus has a function Points|Sample|From
Curve that will produce landmarks spaced along a specified curve.
My second question is regarding correlation and p value. Is it possible
to get information on statistical significance (p value) when I run a
correlation, for example, between centroid size and shape variables
(using TPSPls)?
Look at the randomization options.
Hope this helps at least a little, -ds
Thank you very much in advance for your help.
Kind regards
Mercedes
===
Dr. Mercedes Okumura
Postdoctoral researcher
Museu de Arqueologia e Etnologia
Universidade de São Paulo
Avenida Professor Almeida Prado, 1466
05508-070
São Paulo - SP
Brazil
http://usp-br.academia.edu/MMOkumura
--
Dennis E. Slice
Associate Professor
Dept. of Scientific Computing
Florida State University
Dirac Science Library
Tallahassee, FL 32306-4120
-
Guest Professor
Department of Anthropology
University of Vienna
-
Software worth having/learning/using...
Linux (Operating System: Ubuntu, CentOS, openSUSE, etc.)
OpenOffice (Office Suite: http://www.openoffice.org/)
R package (Stats/Graphics environment: http://www.r-project.org/)
Eclipse (Java/C++/etc IDE: http://www.eclipse.org/)
Netbeans (Java/C++/etc IDE: http://netbeans.org/)
Zotero (FireFox bibliographic extension: http://www.zotero.org/)
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