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message: 'To cite package "spaAlign" in publications use:'
type: software
license: MIT
title: 'spaAlign: Stratigraphic Plug Alignment for Integrating Plug-Based and XRF
  Data'
version: 0.0.6
doi: 10.32614/CRAN.package.spaAlign
abstract: Implements the Stratigraphic Plug Alignment (SPA) procedure for integrating
  sparsely sampled plug-based measurements (e.g., total organic carbon, porosity,
  mineralogy) with high-resolution X-ray fluorescence (XRF) geochemical data. SPA
  uses linear interpolation via the base approx() function with constrained extrapolation
  (rule = 1) to preserve stratigraphic order and avoid estimation beyond observed
  depths. The method aligns all datasets to a common depth grid, enabling high-resolution
  multivariate analysis and stratigraphic interpretation of core-based datasets such
  as those from the Utica and Point Pleasant formations. See R Core Team (2025) <https://stat.ethz.ch/R-manual/R-devel/library/stats/html/stats-package.html>
  and Omodolor (2025) <http://rave.ohiolink.edu/etdc/view?acc_num=case175262671767524>
  for methodological background and geological context.
authors:
- family-names: Omodolor
  given-names: Hope E.
  email: hopeomodolor@gmail.com
  orcid: https://orcid.org/0009-0005-7842-406X
- family-names: Yarus
  given-names: Jeffrey M.
repository: https://omodolor.r-universe.dev
repository-code: https://github.com/Omodolor/spaAlign
commit: 8b19fe42d1836db42a5507bbe5ccb2bc90747967
url: https://omodolor.github.io/spaAlign/
date-released: '2026-01-29'
contact:
- family-names: Omodolor
  given-names: Hope E.
  email: hopeomodolor@gmail.com
  orcid: https://orcid.org/0009-0005-7842-406X