Hi again,
I just found the "Guide to the "Unbend specimens" module in tpsUtil" by 
Travis C. Haas, and now everything is much clearer.
I will still be happy to hear about guidelines or what case are suitable 
(and which are not) for using the unbending tool.
Thanks,
Avi

On Tuesday, April 17, 2018 at 11:24:30 PM UTC+3, Avi Koplovich wrote:
>
> Hi all,
>
> I'm trying to use the unbending tool in tpsUtil, and after reading the 
> help of that program I realized I'll need a nts file that contains the LM 
> for the quadratic curve. But I'm not sure how do I get/create this kind of 
> file. Is it something I can create from my tps file using tpsUtil (or any 
> other program of that package)? I tried converting tps to nts - is this the 
> way? or maybe I can just edit a text file and eventually change its 
> extension to nts (as tps files can be read by notepad)? if yes, what is the 
> exact format I should make it?
>
> Another, though more theoretic question: what are the guidelines or what 
> cases are suitable for using the unbending tool? I digitized extra 
> semi-LM's along a pigment on my tadpoles, starting at the tail tip and 
> ending at the eye. The pigment curve changes according to the body posture 
> (the curve is composed of 7 semi-LM's) so my idea was to unbend the body 
> according to the pigment after the pigment is straighten. Is it possible to 
> use the unbending tool like that? if not, can I unbend it using the pigment 
> in R (any of the GMM packages or else)? How exactly does the unbending tool 
> works: does it unbend fixed and semi LM according to the distance beween 
> the pigment curve and a straight line that goes through all pigment curve 
> semi-LM's? I'm not sure I got this.
>
> Thanks,
>
> Avi
>
>

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