ssutil

1.0.0

Sample Size Calculation Tools

0packages depend

1.9Kdownloads / year

89.0%test coverage

12/13checks pass

Overview

About

Maintained by John J. AponteFirst published 2025-06-121 releasesCRAN page ↗GitHub ↗

Functions for sample size estimation and simulation in clinical trials. Includes methods for selecting the best group using the Indifference-zone approach, as well as designs for non-inferiority, equivalence, and negative binomial models. For the sample size calculation for non-inferiority of vaccines, the approach is based on Fleming, Powers, and Huang (2021) doi:10.1177/1740774520988244. The Indifference-zone approach is based on Sobel and Huyett (1957) doi:10.1002/j.1538-7305.1957.tb02411.x and Bechhofer, Santner, and Goldsman (1995, ISBN:978-0-471-57427-9).

Install

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

install.packages("ssutil", 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("johnaponte/ssutil")

Development version from johnaponte/ssutil. 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-ssutil

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-ssutil

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-ssutil

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

Health

CRAN checks

1NOTE12OK

Failing flavors

NOTE r-devel-linux-x86_64-debian-gcc

Slowest check: 5.3 min · r-oldrel-windows-x86_64

Code health

Yes

Tests · ratio 0.74

89.0%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

NOTE2026-08-01
12 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-06-09
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-06-07
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 163 wordsVignettesYes · dynamicpkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 94%
Documented parameters: 100%
Return-value docs: 100%
References docs: 13%

Downloads

1.9K

CRAN downloads in the past year

Rank #21,321 · ~5/day · ~159/mo

Releases R versions

Daily download trend is not available in this view yet.

13630 days

52390 days

1.9K1 year

Compare downloads with other packages →

Also on89 r2u

Repository

GitHub ↗ johnaponte/ssutil

0Stars

0Forks

0Open issues

0Open PRs

1Releases

96Commits

1Contributors

License AGPL-3.0 · 96 commits · Last activity 2025-06-15

Releases over time

2025-06-10 · 12026-07-07 · 1

Repository practices

Upstream repositoryBeta

1 development-tooling and community-health practice detected across 1 family in the upstream repository

Checks run against github.com/johnaponte/ssutil on 2026-07-31.

Continuous integration (1)

GitHub Actions

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

Dependencies

Declared dependencies

9 external dependencies (excludes base and recommended)

Depends (1)

R >= 4.1

Imports (7)

statsstringr broomMASSgsDesign mvtnorm tibble

LinkingTo (0)

none

Suggests (4)

knitr rmarkdown spelling testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

People & History

People (2)

Maintainer (1)

John J. Aponte

Author, Maintainer

Authors (1)

John J. Aponte

Author, Maintainer

Contributors (1)

Chris Gast

Contributor

Package Timeline

1 release. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
1.0.0Latest
2026-03-10 · current release
R
R 4.5.0 released · 2025-04-11

Package metadata

First published: 2025-06-12
Total releases: 1 / 1 yrs
License: AGPL (>= 3) OSI
Minimum R: ≥ 4.1
Download size: 329 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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