Hi folks, I signal you this new publication: Piras P, Profico A, Pandolfi L, Raia P, Di Vincenzo F, Mondanaro A, Castiglione S and Varano V (2020). Current Options for Visualization of Local Deformation in Modern Shape Analysis Applied to Paleobiological Case Studies. Front. Earth Sci. 8:66. doi: 10.3389/feart.2020.00066
There we present basic theory behind visualization of local deformation in both 2D and 3D borrowed, basically, from continuum mechanics as well as examples in paleontology. We also discuss some aspect of deformation' interpretation in 3D cases when shapes are represented by triangular meshes having a shell-like structure. The use of first and second order gradient tensors, directly calculated or obtained from the computation of TPS' first and second partial derivatives, allows to replicate all anlayes presented in the paper by means of R functions available in Supplementary Information that allows to replicate all illustrated examples. Any script is intended to work "stand alone" and all landmarks necessary for analyses are defined within the scripts so that no workspace loading is necessary. The ad hoc built functions will be present in a future package that is under development. Some basic functions (not related to the core math) are wrappers or hacking of functions present in existing packages; others, mainly regarding speed optimization, are inspired by some Stackoverflow comments. Also, function names are not of course in a "CRAN style" and may change in future. If some warnings appear they can be quietly ignored. The scripts serve to reproduce the figures present in the paper; however, the functions can have numerous options not all of which are shown in the paper' examples. For any question about functions' options or alternative usages contact me (Paolo Piras: [email protected]; [email protected]) in order to have required explanations. All the best Polo -- You received this message because you are subscribed to the Google Groups "Morphmet" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/morphmet2/CAAdPgfPNChyJbQG_nZ8A__3UZEFtvgy2OPR7i1GGEOWrJ%2BL9WA%40mail.gmail.com.
