GroupSeq: Group Sequential Design Probabilities - With Graphical User Interface

Computes probabilities related to group sequential designs for normally distributed test statistics. Enables to derive critical boundaries, power, drift, and confidence intervals of such designs. Supports the alpha spending approach by Lan-DeMets (1994) <doi:10.1002/sim.4780131308>.

Version: 1.4.3
Imports: tcltk, tcltk2, mvtnorm
Suggests: knitr, tinytest, rmarkdown, ggplot2, gridExtra
Published: 2024-02-03
DOI: 10.32614/CRAN.package.GroupSeq
Author: Roman Pahl [aut, cre]
Maintainer: Roman Pahl <roman.pahl at>
License: GPL-3
NeedsCompilation: no
Materials: README NEWS
In views: ExperimentalDesign
CRAN checks: GroupSeq results


Reference manual: GroupSeq.pdf
Vignettes: Introduction to GroupSeq
-1- Compute Bounds
-2- Compute Drift given Power and Bounds
-3- Compute Probabilities given Bounds and Drift
-4- Compute Confidence Interval
Understanding group sequential designs


Package source: GroupSeq_1.4.3.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): GroupSeq_1.4.3.tgz, r-oldrel (arm64): GroupSeq_1.4.3.tgz, r-release (x86_64): GroupSeq_1.4.3.tgz, r-oldrel (x86_64): GroupSeq_1.4.3.tgz
Old sources: GroupSeq archive


Please use the canonical form to link to this page.