Two-/Three-Stage Designs for Phase 1&2 Clinical Trials R package tsdf version 1.1-9 Calculates Zhong's optimal two-/three-stage Phase II designs for single-arm trials, generates target-toxicity decision tables for two-/three-stage Phase I dose-finding, and supports dose-finding simulations using custom decision tables. The Phase II design is based on Zhong (2012) <doi:10.1016/j.cct.2012.07.006>. Software Suggests: knitr, rmarkdown Wenchuan Guo <wguo1017@gmail.com> Comprehensive R Archive Network (CRAN) Wenchuan Guo [aut, cre], Jianan Hui [aut], Bob Zhong [aut] GPL-2 2026-04-26 application/tgz https://CRAN.R-project.org/package=tsdf doi:10.32614/CRAN.package.tsdf