Assessment Tools for Regression Models with Discrete and Semicontinuous Outcomes R package assessor version 1.3.1 Provides assessment tools for regression models with discrete and semicontinuous outcomes proposed in Yang (2021) <doi:10.1080/10618600.2021.1910042>, Yang (2024) <doi:10.1080/10618600.2024.2303336>, Yang (2024) <doi:10.1093/biomtc/ujae007>, and Yang (2026) <doi:10.1002/cjs.70046>. It calculates the double probability integral transform (DPIT) residuals. It also constructs QQ plots of residuals the ordered curve for assessing mean structures, quasi-empirical distribution function for overall assessment, and a formal goodness-of-fit test. Software Depends: R (>= 3.5) Imports: tweedie, MASS, VGAM, np, pscl Suggests: statmod, rmarkdown, knitr, AER, testthat (>= 3.0.0), mgcv Jeonghwan Lee <lee03938@umn.edu> Comprehensive R Archive Network (CRAN) Lu Yang [aut], Jeonghwan Lee [cre, aut] GPL (>= 3) 2026-04-20 application/tgz https://CRAN.R-project.org/package=assessor doi:10.32614/CRAN.package.assessor