curtailment

0.2.6

Finds Binary Outcome Designs Using Stochastic Curtailment

0packages depend

3.2Kdownloads / year

–test coverage

13/13checks pass

Overview

About

Maintained by Martin LawFirst published 2021-08-053 releasesCRAN page ↗GitHub ↗

Finds single- and two-arm designs using stochastic curtailment, as described by Law et al. (2022) doi:10.1080/10543406.2021.2009498 and Law et al. (2021) doi:10.1002/pst.2067 respectively. Designs can be single-stage or multi-stage. Non-stochastic curtailment is possible as a special case. Desired error-rates, maximum sample size and lower and upper anticipated response rates are inputted and suitable designs are returned with operating characteristics. Stopping boundaries and visualisations are also available. The package can find designs using other approaches, for example designs by Simon (1989) doi:10.1016/0197-2456(89)90015-9 and Mander and Thompson (2010) doi:10.1016/j.cct.2010.07.008. Other features: compare and visualise designs using a weighted sum of expected sample sizes under the null and alternative hypotheses and maximum sample size; visualise any binary outcome design.

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("curtailment", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("martinlaw/curtailment")

Development version from martinlaw/curtailment. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-curtailment

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-curtailment

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-curtailment

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 3.0 min · r-devel-linux-x86_64-fedora-clang

Code health

None

Tests · ratio 0.00

not tracked

Coverage

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 301 wordsVignettesNopkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 73%
Documented parameters: 95%
Return-value docs: 100%
References docs: 18%

Downloads

3.2K

CRAN downloads in the past year

Rank #14,217 · ~9/day · ~269/mo

Releases R versions

Daily download trend is not available in this view yet.

25430 days

77490 days

3.2K1 year

Compare downloads with other packages →

Also on102 r2u24 autocran

Repository

GitHub ↗ martinlaw/curtailment

0Stars

1Forks

1Open issues

0Open PRs

12Releases

118Commits

1Contributors

118 commits · Last activity 2026-05-22

Forks over time

2022-02-25 · 12026-07-07 · 1

Repository practices

Upstream repositoryBeta

4 development-tooling and community-health practices detected across 3 families in the upstream repository

Checks run against github.com/martinlaw/curtailment on 2026-07-19.

CRAN release process (2)

cran-comments.mdrevdep/

Docs source (1)

README.Rmd

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

5 external dependencies (excludes base and recommended)

Depends (0)

none

Imports (6)

ggplot2 gridExtra ggthemes data.table pkgcondstats

LinkingTo (0)

none

Suggests (0)

none

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Code Composition

R 6,494 (92%)Rd 581 (8%)

Code characteristics

Object systems

S34

Cyclomatic complexity: 4.0 median / 40 max

Test coverage

Line coverage

–

Expression

–

Tests / Examples

–

Functions

75 11 exported

Complexity

7 avg / 40 max

Call network

75 nodes / 42 edges

Call graph

Open call graph →

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Lowest coverage

Per-function coverage is not measured for this package yet.

People & History

People (1)

Maintainer (1)

Martin Law

Author, Maintainer

Authors (1)

Martin Law

Author, Maintainer

Package Timeline

3 releases. Pick two to compare their code metrics. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
0.2.6Latest
2023-10-25 · current release · diff ↗
R
R 4.3.0 released · 2023-04-21
0.2.0
2022-08-05 · diff ↗
R
R 4.2.0 released · 2022-04-22
0.1.1
2021-08-05
R
R 4.1.0 released · 2021-05-18

Package metadata

First published: 2021-08-05
Total releases: 3 / 5 yrs
License: GPL (>= 3) OSI
Download size: 97 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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