PiChange: Pi-Change: Change Point Detection with Prior-Informed Penalties

PI-Change is a prior-informed multiple change point detection method that incorporates prespecified plausible change point locations through a time-varying penalized likelihood. The method extends multiple change point detection beyond purely data-driven segmentation by allowing external knowledge about plausible change point locations to enter the objective function; see Jacobs and Chen (2026) <doi:10.48550/arXiv.2605.01003>.

Version:	0.0.6
Depends:	R (≥ 4.1.0)
Imports:	grid, ggplot2, Rcpp (≥ 1.0.10), rlang, stats
LinkingTo:	Rcpp
Suggests:	knitr, rmarkdown, testthat (≥ 3.0.0)
Published:	2026-07-28
DOI:	10.32614/CRAN.package.PiChange
Author:	Jonathon Jacobs [aut, cph], Shanshan Chen [aut, cre, cph]
Maintainer:	Shanshan Chen <schen3 at vcu.edu>
License:	MIT + file LICENSE
NeedsCompilation:	yes
Citation:	PiChange citation info
Materials:	README, NEWS
CRAN checks:	PiChange results

Documentation:

Reference manual:	PiChange.html , PiChange.pdf
Vignettes:	Getting Started with Pi-Change (source, R code) Pi-Change: Google Mobility Application (source, R code) Pi-Change: Oil Price Application (source, R code)

Downloads:

Package source:	PiChange_0.0.6.tar.gz
Windows binaries:	r-devel: PiChange_0.0.6.zip, r-release: PiChange_0.0.6.zip, r-oldrel: PiChange_0.0.6.zip
macOS binaries:	r-release (arm64): PiChange_0.0.6.tgz, r-oldrel (arm64): PiChange_0.0.6.tgz, r-release (x86_64): PiChange_0.0.6.tgz, r-oldrel (x86_64): PiChange_0.0.6.tgz

Linking:

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