snvecR: Calculate Earth’s Obliquity and Precession in the Past

Easily calculate precession and obliquity from an orbital solution (defaults to ZB18a from Zeebe and Lourens (2019) <doi:10.1126/science.aax0612>) and assumed or reconstructed values for tidal dissipation (Td) and dynamical ellipticity (Ed). This is a translation and adaptation of the 'C'-code in the supplementary material to Zeebe and Lourens (2022) <doi:10.1029/2021PA004349>, with further details on the methodology described in Zeebe (2022) <doi:10.3847/1538-3881/ac80f8>. The name of the 'C'-routine is 'snvec', which refers to the key units of computation: spin vector s and orbit normal vector n.

Version:	3.10.1
Depends:	R (≥ 3.6.0)
Imports:	deSolve, cli (≥ 3.4.0), stats, dplyr, tibble, purrr, readr, tidyselect, rlang (≥ 0.4.11), glue, tools, backports (≥ 1.1.6), stringr
Suggests:	astrochron, ggplot2, tidyr, testthat, roxygen2, knitr, withr, curl, rmarkdown
Published:	2025-03-06
DOI:	10.32614/CRAN.package.snvecR
Author:	Ilja Kocken [aut, cre, trl, cph], Richard Zeebe [aut]
Maintainer:	Ilja Kocken <ikocken at hawaii.edu>
BugReports:	https://github.com/japhir/snvecR/issues
License:	GPL (≥ 3)
URL:	https://japhir.github.io/snvecR/, https://github.com/japhir/snvecR
NeedsCompilation:	no
Citation:	snvecR citation info
Materials:	README NEWS
CRAN checks:	snvecR results

Documentation:

Reference manual:	snvecR.pdf
Vignettes:	Analyze a grid of Td and Ed values (source, R code) Compare R and C implementations (source, R code)

Downloads:

Package source:	snvecR_3.10.1.tar.gz
Windows binaries:	r-devel: snvecR_3.10.1.zip, r-release: snvecR_3.10.1.zip, r-oldrel: snvecR_3.10.1.zip
macOS binaries:	r-devel (arm64): snvecR_3.10.1.tgz, r-release (arm64): snvecR_3.10.1.tgz, r-oldrel (arm64): snvecR_3.10.1.tgz, r-devel (x86_64): snvecR_3.10.1.tgz, r-release (x86_64): snvecR_3.10.1.tgz, r-oldrel (x86_64): snvecR_3.10.1.tgz
Old sources:	snvecR archive

Linking:

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