odr

1.8.3

Optimal Design and Statistical Power for Experimental Studies Investigating Main, Mediation, and Moderation Effects

1packages depend

3.8Kdownloads / year

–test coverage

13/13checks pass

Overview

About

Maintained by Zuchao ShenFirst published 2017-09-1713 releasesCRAN page ↗

Calculate the optimal sample size allocation that uses the minimum resources to achieve targeted statistical power in experiments. Perform power analyses with and without accommodating costs and budget. The designs cover single-level and multilevel experiments detecting main, mediation, and moderation effects (and some combinations). The references for the proposed methods include: (1) Shen, Z., & Kelcey, B. (2020). Optimal sample allocation under unequal costs in cluster-randomized trials. Journal of Educational and Behavioral Statistics, 45(4): 446-474. doi:10.3102/1076998620912418. (2) Shen, Z., & Kelcey, B. (2022b). Optimal sample allocation for three-level multisite cluster-randomized trials. Journal of Research on Educational Effectiveness, 15 (1), 130-150. doi:10.1080/19345747.2021.1953200. (3) Shen, Z., & Kelcey, B. (2022a). Optimal sample allocation in multisite randomized trials. The Journal of Experimental Education, 90(3), 693-711. doi:10.1080/00220973.2020.1830361. (4) Shen, Z., Leite, W., Zhang, H., Quan, J., & Kuang, H. (2025). Using ant colony optimization to identify optimal sample allocations in cluster-randomized trials. The Journal of Experimental Education, 93(1), 167-185. doi:10.1080/00220973.2024.2306392. (5) Shen, Z., Li, W., & Leite, W. (in press). Statistical power and optimal design for randomized controlled trials investigating mediation effects. Psychological Methods. doi:10.1037/met0000698. (6) Champely, S. (2020). pwr: Basic functions for power analysis (Version 1.3-0) [Software]. Available from https://CRAN.R-project.org/package=pwr.

Install

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

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

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

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-odr

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-odr

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-odr

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

Health

CRAN checks

13OK

Slowest check: 4.0 min · r-oldrel-macos-x86_64

Code health

None

Tests · ratio 0.00

not tracked

Coverage

100%

Documentation · exports

Dependencies · direct

Check history

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

Documentation

READMENoVignettesYes · dynamicpkgdown siteNoNEWSNoCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 100%
Return-value docs: 94%
References docs: 34%

Downloads

3.8K

CRAN downloads in the past year

Rank #14,816 · ~11/day · ~320/mo

Releases R versions

Daily download trend is not available in this view yet.

22430 days

75190 days

3.8K1 year

Compare downloads with other packages →

Also on133 r2u32 autocran103 c2d4u

Dependencies

Declared dependencies

4 external dependencies (excludes base and recommended)

Depends (4)

R >= 3.3.0statsgraphicsbase(>= 3.0.0)

Imports (0)

none

LinkingTo (0)

none

Suggests (3)

rmarkdown knitr markdown

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

1direct

0indirect

anomo

Code & Tests

People & History

People (2)

Maintainer (1)

Zuchao Shen

Author, Maintainer

Authors (2)

Zuchao Shen

Author, Maintainer

Benjamin Kelcey

Author · added in 1.2.1

Listed in earlier versions (1)

Ben Kelcey

no longer listed · 1.0.0 to 1.0.2

Package Timeline

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

R
R 4.6.0 released · 2026-04-24
1.8.3Latest
2026-02-11 · current release · diff ↗
1.7.3
2025-10-31 · diff ↗
1.6.3
2025-08-20 · diff ↗
1.5.0
2025-05-29 · diff ↗
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
1.4.4
2023-08-08 · diff ↗
1.4.2
2023-04-24 · diff ↗
R
R 4.3.0 released · 2023-04-21
1.4.1
2023-04-02 · diff ↗
1.3.1
2022-04-30 · diff ↗
R
R 4.2.0 released · 2022-04-22
1.2.1
2021-09-16 · diff ↗
R
R 4.1.0 released · 2021-05-18
R
R 4.0.0 released · 2020-04-24

Show 7 earlier events

1.0.2
2020-03-13 · diff ↗
R
R 3.6.0 released · 2019-04-26
1.0.0
2018-10-03 · diff ↗
R
R 3.5.0 released · 2018-04-23
0.7.3
2018-01-03 · diff ↗
0.3.2
2017-09-17
R
R 3.4.0 released · 2017-04-21

Package metadata

First published: 2017-09-17
Total releases: 13 / 9 yrs
License: GPL-3 OSI
Minimum R: ≥ 3.3.0
Download size: 144 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Appears in task views

Design of Experiments (DoE) & Analysis of Experimental Data

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