I will have to check to see what the conflicts may be. It may take a day or two 
because I expect to be out tomorrow. I have not looked that export option for a 
while. Always a chance for a bug! 


F. James Rohlf                                    
Distinguished Professor, Emeritus and Research Professor
Depts: Anthropology and Ecology & Evolution
Stony Brook University
On 3/13/2021 6:57:45 PM, Andrés Felipe Garzón Agudelo <[email protected]> 
wrote:
Hello everyone, I have a couple of questions about tpsRelw and MorphoJ that I 
hope someone could answer.

I performed a GPA with sliding semilandmarks in tpsRelw v 1.71, after that, my 
intention was to proceed with the analysis in MorphoJ. So, I saved the "Scaled 
aligned specimens" file in order to import the shape and size information in 
MorphoJ. But I found something odd at this point. I saved the "Scaled 
specimens" in .tps and .nts formats and the values of the coordinates are 
different in the two files (i think this may be a bug).

The coordinates in the .nts file seem to make more sense, however, I don't 
understand where they come from. I thought they simply would be equal to the 
coordinates in the "aligned specimens" file multiplied by the centroid size 
values. Could someone explain this to me?


Then I continued using the .nts file in MorphoJ. I did another GPA and exported 
the centroid size values to compare them with the ones I got in tpsRelw. They 
are very different and I don't understand why.


I would appreciate your comments on this. I attach the files I mentioned in 
case anyone wants to take a look at them.  


Best,
Felipe Garzón

GPA parameters used in tpsRelw:
* PCA align reference
* Slide semilandmarks by Chord-min BE
* Scale aligned---1
* Projection---None
* Alignment---Procrustes

--

Felipe Garzón Agudelo
Biólogo
Universidad Nacional de Colombia
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