R Observatory: Metrics for NPCD version 1.0-11

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

NPCD

1.0-11

Nonparametric Methods for Cognitive Diagnosis

1packages depend

3Kdownloads / year

–test coverage

13/13checks pass

Overview

About

Maintained by Yi ZhengFirst published 2012-12-2212 releasesCRAN page ↗

An array of nonparametric and parametric estimation methods for cognitive diagnostic models, including nonparametric classification of examinee attribute profiles, joint maximum likelihood estimation (JMLE) of examinee attribute profiles and item parameters, and nonparametric refinement of the Q-matrix, as well as conditional maximum likelihood estimation (CMLE) of examinee attribute profiles given item parameters and CMLE of item parameters given examinee attribute profiles. Currently the nonparametric methods in the package support both conjunctive and disjunctive models, and the parametric methods in the package support the DINA model, the DINO model, the NIDA model, the G-NIDA model, and the R-RUM model.

Install

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

install.packages("NPCD", 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-npcd

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-NPCD

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-NPCD

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

Health

CRAN checks

13OK

Slowest check: 1.0 min · r-oldrel-windows-x86_64

Code health

None

Tests · ratio 0.00

not tracked

Coverage

100%

Documentation · exports

2

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

Documentation

READMENoVignettesNopkgdown siteNoNEWSNoCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 98%
Return-value docs: 100%
References docs: 40%

Downloads

3K

CRAN downloads in the past year

Rank #12,818 · ~8/day · ~252/mo

Releases R versions

Daily download trend is not available in this view yet.

15030 days

78690 days

3K1 year

Compare downloads with other packages →

Also on88 r2u14 autocran

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Depends (2)

R >= 2.14.2BB

Imports (1)

R.methodsS3

LinkingTo (0)

none

Suggests (0)

none

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

1direct

0indirect

cdcatR

Code & Tests

People & History

People (3)

Maintainer (1)

Yi Zheng

Author, Maintainer

Authors (2)

Yi Zheng

Author, Maintainer

Chia-Yi Chiu

Author

Contributors (1)

Jeffrey A. Douglas

Contributor · added in 1.0-5

Package Timeline

12 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
R
R 4.3.0 released · 2023-04-21
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
R
R 4.0.0 released · 2020-04-24
1.0-11Latest
2019-11-15 · current release · diff ↗
R
R 3.6.0 released · 2019-04-26
R
R 3.5.0 released · 2018-04-23
R
R 3.4.0 released · 2017-04-21
1.0-10
2016-10-18 · diff ↗
R
R 3.3.0 released · 2016-05-03
1.0-9
2015-10-03 · diff ↗
1.0-8
2015-05-02 · diff ↗
R
R 3.2.0 released · 2015-04-16

Show 11 earlier events

1.0-7
2014-12-03 · diff ↗
1.0-6
2014-05-02 · diff ↗
R
R 3.1.0 released · 2014-04-10
1.0-5
2014-02-13 · diff ↗
1.0-4
2013-07-26 · diff ↗
1.0-3
2013-05-30 · diff ↗
1.0-2
2013-04-05 · diff ↗
R
R 3.0.0 released · 2013-04-03
1.0-1
2013-02-05 · diff ↗
1.0-0
2012-12-22
R
R 2.15.0 released · 2012-03-30

Package metadata

First published: 2012-12-22
Total releases: 12 / 14 yrs
License: LGPL (>= 2.1)
Minimum R: ≥ 2.14.2
Bundled data: 7.9 KB / 3 files
Download size: 47 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("NPCD")

Format

Zheng, Y., Chiu, C., & Douglas, J. A. (2019). NPCD: Nonparametric Methods for Cognitive Diagnosis (Version 1.0-11) [Computer software]. https://doi.org/10.32614/CRAN.package.NPCD

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 NPCD version 1.0-11 [Data set]. HJJB, LLC. Data release v2026-08-17. https://doi.org/10.5281/zenodo.21843040

From data release v2026-08-17, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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