R Observatory: Metrics for NCA version 5.0.2

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

NCA

5.0.2

Necessary Condition Analysis

0packages depend

14.7Kdownloads / year

1.7%test coverage

13/13checks pass

Overview

About

Maintained by Govert BuijsFirst published 2015-07-0224 releasesCRAN page ↗

Performs a Necessary Condition Analysis (NCA). (Dul, J. 2016. Necessary Condition Analysis (NCA). ''Logic and Methodology of 'Necessary but not Sufficient' causality." Organizational Research Methods 19(1), 10-52) doi:10.1177/1094428115584005. NCA identifies necessary (but not sufficient) conditions in datasets, where x causes (e.g. precedes) y. Instead of drawing a regression line ''through the middle of the data'' in an xy-plot, NCA draws the ceiling line. The ceiling line y = f(x) separates the area with observations from the area without observations. (Nearly) all observations are below the ceiling line: y <= f(x). The empty zone is in the upper left hand corner of the xy-plot (with the convention that the x-axis is ''horizontal'' and the y-axis is ''vertical'' and that values increase ''upwards'' and ''to the right''). The ceiling line is a (piecewise) linear non-decreasing line: a linear step function or a straight line. It indicates which level of x (e.g., an effort, a characteristic) is necessary but not sufficient for a (desired or undesired) level of y (e.g., good performance or disease). A quick start guide for using this package can be found here: https://repub.eur.nl/pub/78323/ or https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2624981.

Install

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

install.packages("NCA", 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-nca

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-NCA

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-NCA

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

Health

CRAN checks

13OK

Slowest check: 4.3 min · r-oldrel-windows-x86_64

Code health

Yes

Tests · ratio 0.02

1.7%

Coverage · measured lines

100%

Documentation · exports

12

Dependencies · direct

Check history

OK2026-08-05
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
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
ERROR2026-06-08
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesNopkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 100%
Return-value docs: 13%
References docs: 5%

Downloads

14.7K

CRAN downloads in the past year

Rank #3,159 · ~40/day · ~1.2K/mo

Releases R versions

Daily download trend is not available in this view yet.

98130 days

3.8K90 days

14.7K1 year

Compare downloads with other packages →

Also on153 r2u

Dependencies

Declared dependencies

12 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.5.0

Imports (12)

gplots quantregKernSmoothlpSolve ggplot2 doParallel foreach iterators plotly truncnorm DBI RSQLite

LinkingTo (0)

none

Suggests (1)

testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Datasets

People & History

People (2)

Maintainer (1)

Govert Buijs

Maintainer · added in 4.0.2

Authors (1)

Jan Dul

Author

Package Timeline

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

5.0.2Latest
2026-06-17 · current release · diff ↗
5.0.1
2026-04-28 · diff ↗
R
R 4.6.0 released · 2026-04-24
5.0.0
2026-03-20 · diff ↗
4.0.5
2025-12-21 · diff ↗
4.0.4
2025-11-14 · diff ↗
4.0.3
2025-10-14 · diff ↗
R
R 4.5.0 released · 2025-04-11
4.0.2
2024-11-09 · diff ↗
R
R 4.4.0 released · 2024-04-24
4.0.1
2024-02-23 · diff ↗
4.0.0
2024-02-16 · diff ↗
3.3.3
2023-09-05 · diff ↗
3.3.2
2023-06-27 · diff ↗
R
R 4.3.0 released · 2023-04-21
3.3.1
2023-02-10 · diff ↗

Show 20 earlier events

3.3.0
2023-02-06 · diff ↗
3.2.1
2022-09-15 · diff ↗
R
R 4.2.0 released · 2022-04-22
3.2.0
2022-04-05 · diff ↗
R
R 4.1.0 released · 2021-05-18
3.1.1
2021-05-03 · diff ↗
3.1.0
2021-03-02 · diff ↗
3.0.3
2020-06-11 · diff ↗
R
R 4.0.0 released · 2020-04-24
3.0.2
2019-11-22 · diff ↗
R
R 3.6.0 released · 2019-04-26
3.0.1
2018-08-21 · diff ↗
3.0
2018-08-01 · diff ↗
R
R 3.5.0 released · 2018-04-23
R
R 3.4.0 released · 2017-04-21
2.0
2016-05-18 · diff ↗
R
R 3.3.0 released · 2016-05-03
1.1
2015-10-10 · diff ↗
1.0
2015-07-02
R
R 3.2.0 released · 2015-04-16

Package metadata

First published: 2015-07-02
Total releases: 24 / 11 yrs
License: GPL (>= 3) OSI
Minimum R: ≥ 3.5.0
Bundled data: 1.2 KB / 3 files
Download size: 71 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("NCA")

Format

Buijs, G., & Dul, J. (2026). NCA: Necessary Condition Analysis (Version 5.0.2) [Computer software]. https://doi.org/10.32614/CRAN.package.NCA

This is what citation() produces when a package has no citation file of its own. If it prints something else, use that.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for NCA version 5.0.2 [Data set]. HJJB, LLC. Data release v2026-08-16. https://doi.org/10.5281/zenodo.21843040

From data release v2026-08-16, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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