R Observatory: Metrics for NPCDTools version 1.2.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

NPCDTools

1.2.0Package record

The Nonparametric Classification Methods for Cognitive Diagnosis

0packages depend

2.2Kdownloads / year

–test coverage

13/13flavors OK

Overview

About

Maintained by Weixuan XiaoCRAN page ↗

Statistical tools for analyzing cognitive diagnosis (CD) data collected from small settings using the nonparametric classification (NPCD) framework. The core methods of the NPCD framework includes the nonparametric classification (NPC) method developed by Chiu and Douglas (2013) DOI:10.1007/s00357-013-9132-9 and the general NPC (GNPC) method developed by Chiu, Sun, and Bian (2018) DOI:10.1007/s11336-017-9595-4 and Chiu and Köhn (2019) DOI:10.1007/s11336-019-09660-x. An extension of the NPCD framework included in the package is the nonparametric method for multiple-choice items (MC-NPC) developed by Wang, Chiu, and Koehn (2023) DOI:10.3102/10769986221133088. Functions associated with various extensions concerning the evaluation, validation, and feasibility of the CD analysis are also provided. These topics include the completeness of Q-matrix, Q-matrix refinement method, as well as Q-matrix estimation.

Changes in 1.2.0

Renamed the NPC() output component alpha.est to att.est for consistency with GNPC(). This is a breaking change: code using NPC(...)$alpha.est must now use NPC(...)$att.est.

From NEWS.md in the release

Install

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

install.packages("NPCDTools", 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-npcdtools

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

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-NPCDTools

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-NPCDTools

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13OK

CRAN check page ↗

Slowest check: 1.2 min · r-oldrel-windows-x86_64

Status changes

OK13 OK2026-09-08
ERROR12 OK, 1 ERROR2026-09-07
OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 1.2.0

READMENoVignettesNoNEWSYes · 100% structured · mentions 1.2.0Citation fileNoWebsitenot declared in DESCRIPTION

Help pages: 26
Examples that run: 0%9 never run · 4 hold no code
Exported functions with examples: 63%
Documented parameters: 99%
Return-value docs: 95%
Help pages citing references: 35%

How these are measured

Downloads

2.2K

CRAN downloads in the past year

Rank #19,691 · ~6/day · ~185/mo

Releases R versions

Daily download trend is not available in this view yet.

25730 days

66790 days

2.2K1 year

Compare downloads with other packages →

Also on90 r2u4 autocran

How downloads are counted

Dependencies

Declared dependencies

4 external dependencies (excludes base and recommended)

Installing NPCDTools adds 60 packages (31 with compiled code, 45 MB of source tarballs). Heaviest: ggplot2 6.0 MB, bslib 5.6 MB, promises 3.1 MB.

Depends (1)

R >= 2.10

Imports (8)

GDINA psychstatsutilsgtoolsMatrixshinyMASS

LinkingTo (0)

none

Suggests (0)

none

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

How these are counted

Code & Tests

Datasets

People & History

People (5)

Weixuan Xiao

Author, Maintainer since 1.0 (2024)

Chia-Yi Chiu

Author, Copyright holder

Hans Friedrich Köhn

Author · added in 1.1.0

Yu Wang

Author

Xiran Wen

Author

Releases (3)

Pick two releases to compare their code metrics.

1.2.0Latest
record
2026-08-31 · current release · diff ↗ ·
added 3 exports
MCNPC, mcQ.generate, mcdat.generate
R
R 4.6.0 released · 2026-04-24
1.1.0
record
2026-03-03 · diff ↗ ·
added 5 exports
Q.completeness, Q.implausible, Q.improper, distractor.check, run_gnpc_app
R
R 4.5.0 released · 2025-04-11
1.0
record
2024-09-23
R
R 4.4.0 released · 2024-04-24

Package metadata

First published: 2024-09-23
Total releases: 3 / 2 yrs
License: GPL-3 OSI
Minimum R: ≥ 2.10
Bundled data: 0.3 KB / 1 file
Download size: 79 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("NPCDTools")

Format

Xiao, W., Chiu, C., Köhn, H. F., Wang, Y., & Wen, X. (2026). NPCDTools: The Nonparametric Classification Methods for Cognitive Diagnosis (Version 1.2.0) [Computer software]. https://doi.org/10.32614/CRAN.package.NPCDTools

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

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 NPCDTools version 1.2.0 [Data set]. HJJB, LLC. Data release v2026-10-21. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-21, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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