ETRep: Analysis of Elliptical Tubes Under the Relative Curvature Condition

Analysis of elliptical tubes with applications in biological modeling. The package is based on the references: Taheri, M., Pizer, S. M., & Schulz, J. (2024) "The Mean Shape under the Relative Curvature Condition." Journal of Computational and Graphical Statistics <doi:10.1080/10618600.2025.2535600> and arXiv <doi:10.48550/arXiv.2404.01043>. Mohsen Taheri Shalmani (2024) "Shape Statistics via Skeletal Structures", PhD Thesis, University of Stavanger, Norway <doi:10.13140/RG.2.2.34500.23685>. Key features include constructing discrete elliptical tubes, calculating transformations, validating structures under the Relative Curvature Condition (RCC), computing means, and generating simulations. Supports intrinsic and non-intrinsic mean calculations and transformations, size estimation, plotting, and random sample generation based on a reference tube. The intrinsic approach relies on the interior path of the original non-convex space, incorporating the RCC, while the non-intrinsic approach uses a basic robotic arm transformation that disregards the RCC.

Version:	1.2.1
Depends:	R (≥ 4.0.0)
Imports:	rgl, shapes, Morpho, matlib, RSpincalc, rotations, Rvcg, fields, truncnorm, htmlwidgets
Published:	2025-09-27
DOI:	10.32614/CRAN.package.ETRep
Author:	Mohsen Taheri Shalmani [aut, cre], Jörn Schulz [aut], Stephen M. Pizer [aut]
Maintainer:	Mohsen Taheri Shalmani <MohsenTaheriShalmani at gmail.com>
License:	MIT + file LICENSE
URL:	https://github.com/MohsenTaheriShalmani/Elliptical_Tubes
NeedsCompilation:	no
Materials:	NEWS
CRAN checks:	ETRep results

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