Hi Andrea,
maybe:
Piras, P., Colangelo P., Adams D.C., Buscalioni A., Cubo J., Kotsakis T.,
Meloro C. & Raia P. (2010) - The Gavialis-Tomistoma debate: the
contribution of skull ontogenetic allometry and growth trajectories to the
study of crocodylian relationships. Evolution and Development, 12:
tance took about 0.06 seconds as opposed to the 1.3 seconds
> required by the paireucdist function, which has more options, obviously.
> Not a big deal here. However, if someone has a large data set (unlike this
> simple one) on which GPA has already been performed, and coordinate data
>
tantamount to
> performing GPA, and subsequently realigning configurations as if all other
> n - 2 configurations do not matter. Whether the other n - 2 configurations
> do not matter might be interesting to discuss.
>
> Cheers!
> Mike
>
>
>
> On Oct 17, 2022, at
I wrote this function in R many years ago that returns the desired pairwise
interlandmarks distances for all individuals present in an array; a single
matrix configuration is allowed too ; put a vector 1:n with n the number of
landmarks to have them all. I think it could be improved in terms of
Hi folks,
here:
https://www.mdpi.com/2227-7390/10/9/1562/pdf
you can find a new paper about geodesics in the TPS space Riemannian
manifold proposed by our group some years ago.
We define an analitical solution for the affine subspace and we show, via
optimization methods, the efficacy of TPS
Hi folks,
we are developing a strategy to properly set mu1 and mu2 parameters when
looking for geodesics in the TPS space. I write you in order to ask for
repositories of 2D and 3D real data digitized via homologous landmarking.
More than one dataset is welcome. We look for a very large
Hi folks,
here
https://link.springer.com/article/10.1007/s10851-021-01030-6
(in open access) you can find this paper that compares different approaches
for the estimation of deformation and for parallel transport. Explaining
that this topic is related more than it seems to a previous one regarding
"Of course, there can be exceptions and a biological signal can be local
and be represented well by a single landmark or a single interlandmark
distance."
I think that a proper evaluation of local deformation could be effective in
interpreting the "localness" of both shape and deformation
I Ian and David,
yes, maybe an ad hoc R package would be great but for reasons not depending
on my merits (or de-merits) I'm not (virtually and hoping for some miracles
that could bring me again in the research field) on the field of scientific
research anymore. So.only if Antonio Profico and
Sorry for the splitted message;
Also...in the cited paper all metrics can be now performed in both 2D and
3D; in the 3D case the two sub-cases of "surface/shell" computation or
"fully 3D volume" computation are faced and differently approached (TPS
first and second derivatives in 3D cannot be
Hi,
Take a look at this for the estimation of relevant metrics:
https://www.frontiersin.org/articles/10.3389/feart.2020.00066/full
Ciao
Paolo
Il ven 4 set 2020, 04:17 Igor Talijančić ha
scritto:
> Greetings!
>
> I am interested in the measurement of local variation in the head shape of
>
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