Optimal Two-Period Multiarm Platform Design with New Experimental Arms Added During the Trial R package PlatformDesign version 2.1.4 Design parameters of the optimal two-period multiarm platform design (controlling for either family-wise error rate or pair-wise error rate) can be calculated using this package, allowing pre-planned deferred arms to be added during the trial. More details about the design method can be found in the paper: Pan, H., Yuan, X. and Ye, J. (2022) "An optimal two-period multiarm platform design with new experimental arms added during the trial". Manuscript submitted for publication. For additional references: Dunnett, C. W. (1955) <doi:10.2307/2281208>. Software Imports: mvtnorm, stats Suggests: knitr, rmarkdown, ggplot2, testthat (>= 3.0.0) Xiaomeng Yuan <xiaomeng.yuan@stjude.org> Comprehensive R Archive Network (CRAN) Xiaomeng Yuan [aut, cre], Haitao Pan [aut] GPL (>= 3) 2022-12-15 application/tgz https://CRAN.R-project.org/package=PlatformDesign doi:10.32614/CRAN.package.PlatformDesign