R Observatory: Metrics for IRTC version 1.1.1

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

IRTC

1.1.1

Marginal Maximum Likelihood Estimation for Item Response Models

0packages depend

143downloads / year

–test coverage

13/13checks pass

Overview

About

Maintained by Kunxiang MaFirst published 2026-07-241 releasesCRAN page ↗GitHub ↗

Self-contained marginal maximum likelihood (MML) estimation for unidimensional and multidimensional item response models, including the Rasch / one-parameter logistic, partial credit, rating scale, two-parameter logistic and generalised partial credit models, with latent regression, multiple groups and case weights. A parallelised, dimension-factorised streaming estimation engine supports large between-item (simple-structure) multidimensional models with bounded memory and an opt-in controlled-accuracy quadrature mode that reports a measured approximation error. A usability layer serves non-specialists and automated pipelines: one-stop estimation from common file formats ('Excel', delimited text, 'SPSS', 'Stata', 'SAS') with automatic cleaning and answer-key scoring, pre-estimation data checks, classical item statistics and item fit, plain-language quality ratings, bilingual (English/Chinese) output, spreadsheet exports for item banking and cross-year linking, audience-specific 'Word'/'HTML' reports, and machine-readable results with structured error conditions. Methods follow Adams, Wilson and Wang (1997) doi:10.1177/0146621697211001.

Install

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

install.packages("IRTC", 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("weiandata/IRTC")

Development version from weiandata/IRTC. 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-irtc

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-IRTC

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-IRTC

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

Health

CRAN checks

13OK

Slowest check: 11.4 min · r-oldrel-windows-x86_64

Code health

Yes

Tests · ratio 0.50

not tracked

Coverage

100%

Documentation · exports

8

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
OK2026-07-25
6 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesNopkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 88%
Documented parameters: 99%
Return-value docs: 100%
References docs: 5%

Downloads

143

CRAN downloads in the past year

Rank #24,488 · ~0/day · ~12/mo

Releases R versions

Daily download trend is not available in this view yet.

14330 days

14390 days

1431 year

Compare downloads with other packages →

Also on12 r2u9 autocran

Repository

GitHub ↗ weiandata/irtc

0Stars

0Forks

0Open issues

0Open PRs

0Releases

License GPL-2.0 · Last activity 2026-07-31

Issues over time

2026-07-25 · 62026-08-01 · 0

Repository practices

Upstream repositoryBeta

6 development-tooling and community-health practices detected across 4 families in the upstream repository

Checks run against github.com/weiandata/irtc on 2026-08-09.

Continuous integration (1)

GitHub Actions

CRAN release process (1)

cran-comments.md

Lint, format, editor (1)

EditorConfig

Governance and community (3)

Issue templatesSecurity policyCODEOWNERS

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

Dependencies

Declared dependencies

12 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.5.0

Imports (8)

RcppstatsutilsmethodsMASStoolsgraphicsgrDevices

LinkingTo (2)

Rcpp RcppArmadillo

Suggests (9)

testthat mvtnorm sfsmisc readxl writexl haven openxlsx officer jsonlite

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Nothing depends on this yet.

Code & Tests

Datasets

People & History

People (2)

Maintainer (1)

Kunxiang Ma

Author, Maintainer

Authors (1)

Kunxiang Ma

Author, Maintainer

Copyright holders (1)

WEIAN DATA TECH (Beijing) Co., Ltd.

Copyright holder, Funder

Funders (1)

WEIAN DATA TECH (Beijing) Co., Ltd.

Copyright holder, Funder

Package Timeline

1 release. R releases are shown for context.

1.1.1Latest
2026-07-24 · current release
R
R 4.6.0 released · 2026-04-24

Package metadata

First published: 2026-07-24
Total releases: 1 / 1 yrs
License: GPL (>= 2) OSI
Minimum R: ≥ 3.5.0
Bundled data: 15 KB / 3 files
Download size: not tracked yet
Installed size: not tracked yet
With dependencies: not tracked yet

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("IRTC")

Format

Ma, K., & WEIAN DATA TECH (Beijing) Co., Ltd. (2026). IRTC: Marginal Maximum Likelihood Estimation for Item Response Models (Version 1.1.1) [Computer software]. https://doi.org/10.32614/CRAN.package.IRTC

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 IRTC version 1.1.1 [Data set]. HJJB, LLC. Data release v2026-08-10. https://doi.org/10.5281/zenodo.21843040

From data release v2026-08-10, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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