Utilities and Helpers for Single Case Experimental Design (SCED) using 'ggplot2' R package ggsced version 0.1.9 Provides specialized visualization tools for Single-Case Experimental Design (SCED) research using 'ggplot2'. SCED studies are a crucial methodology in behavioral and educational research where individual participants serve as their own controls through carefully designed experimental phases. This package extends 'ggplot2' to create publication-ready graphics with professional phase change lines, support for multiple baseline designs, and styling functions that follow SCED visualization conventions. Key functions include adding phase change demarcation lines to existing plots and formatting axes with broken axis appearance commonly used in single-case research. Software Depends: ggplot2, R (>= 3.5.0) Imports: grid, gtable, ggh4x, assert, dplyr Suggests: knitr, rmarkdown, testthat (>= 3.0.0), usethis, tidyverse Shawn Gilroy <sgilroy1@lsu.edu> Comprehensive R Archive Network (CRAN) Shawn Gilroy [aut, cre, cph] (ORCID: <https://orcid.org/0000-0002-1097-8366>) GPL (>= 2) 2026-07-23 application/tgz https://CRAN.R-project.org/package=ggsced doi:10.32614/CRAN.package.ggsced