Pi-Change: Change Point Detection with Prior-Informed Penalties R package PiChange version 0.0.6 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>. Software Depends: R (>= 4.1.0) Imports: grid, ggplot2, Rcpp (>= 1.0.10), rlang, stats LinkingTo: Rcpp Suggests: knitr, rmarkdown, testthat (>= 3.0.0) Shanshan Chen <schen3@vcu.edu> Comprehensive R Archive Network (CRAN) Jonathon Jacobs [aut, cph], Shanshan Chen [aut, cre, cph] MIT + file LICENSE (https://CRAN.R-project.org/package=PiChange/LICENSE) 2026-07-28 application/tgz https://CRAN.R-project.org/package=PiChange doi:10.32614/CRAN.package.PiChange