R Observatory: Metrics for ltm version 1.2-0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

ltm

1.2-0

Latent Trait Models under IRT

23packages depend

91.2Kdownloads / year

–test coverage

11/13checks pass

Overview

About

Maintained by Dimitris RizopoulosFirst published 2005-03-1437 releasesCRAN page ↗GitHub ↗

Analysis of multivariate dichotomous and polytomous data using latent trait models under the Item Response Theory approach. It includes the Rasch, the Two-Parameter Logistic, the Birnbaum's Three-Parameter, the Graded Response, and the Generalized Partial Credit Models.

Install

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

install.packages("ltm", 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("drizopoulos/ltm")

Development version from drizopoulos/ltm. 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-ltm

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-ltm

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-ltm

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

Health

CRAN checks

2NOTE11OK

Failing flavors

NOTE r-devel-linux-x86_64-debian-clang
NOTE r-devel-linux-x86_64-debian-gcc

Slowest check: 3.4 min · r-devel-windows-x86_64

Code health

None

Tests · ratio 0.00

not tracked

Coverage

100%

Documentation · exports

3

Dependencies · direct

Check history

NOTE2026-03-10
12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesNopkgdown siteNoNEWSNoCode of conductNoContributing guideNo

Examples that run: 97%
Documented parameters: 95%
Return-value docs: 93%
References docs: 58%

Downloads

91.2K

CRAN downloads in the past year

Rank #1,636 · ~250/day · ~7.6K/mo

Releases R versions

Daily download trend is not available in this view yet.

3.6K30 days

15.5K90 days

91.2K1 year

Compare downloads with other packages →

Also on287 r2u16 autocran77 c2d4u

Repository

GitHub ↗ drizopoulos/ltm

30Stars

11Forks

1Open issues

0Open PRs

0Releases

17Commits

4Contributors

17 commits · Last activity 2022-03-06

Stars over time

2024-04-10 · 302026-07-07 · 30

Repository practices

Upstream repositoryBeta

1 development-tooling and community-health practice detected across 1 family in the upstream repository

Checks run against github.com/drizopoulos/ltm on 2026-08-09.

Git structural (1)

.gitattributes

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

Dependencies

Declared dependencies

2 external dependencies (excludes base and recommended)

Depends (4)

R >= 3.0.0MASSmsm polycor

Imports (0)

none

LinkingTo (0)

none

Suggests (0)

none

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

23direct

7indirect

GPCMlasso IMTest PCMRS PerFit UPCM catSurv integIRTy irtoys kequate subscore CTTShiny IRTShiny PsyControl RSP difR irtreliability tcl RMX ShinyItemAnalysis catIrt equateIRT equateMultiple latdiag

Code & Tests

Datasets

People & History

People (0)

Author records are not tracked yet for this package.

Listed in earlier versions (1)

Dimitris Rizopoulos

no longer listed · 0.1-0 to 1.2-0

Package Timeline

37 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
1.2-0Latest
2022-02-18 · current release · diff ↗
R
R 4.1.0 released · 2021-05-18
R
R 4.0.0 released · 2020-04-24
R
R 3.6.0 released · 2019-04-26
R
R 3.5.0 released · 2018-04-23
1.1-1
2018-04-17 · diff ↗
1.1-0
2017-09-11 · diff ↗
R
R 3.4.0 released · 2017-04-21
R
R 3.3.0 released · 2016-05-03
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R 3.2.0 released · 2015-04-16
R
R 3.1.0 released · 2014-04-10

Show 51 earlier events

1.0-0
2013-12-20 · diff ↗
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R 3.0.0 released · 2013-04-03
0.9-9
2012-09-17 · diff ↗
0.9-8
2012-08-17 · diff ↗
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R 2.15.0 released · 2012-03-30
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R 2.14.0 released · 2011-10-31
0.9-7
2011-10-18 · diff ↗
0.9-6
2011-09-19 · diff ↗
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R 2.13.0 released · 2011-04-13
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R 2.12.0 released · 2010-10-15
0.9-5
2010-09-30 · diff ↗
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R 2.11.0 released · 2010-04-22
0.9-4
2010-03-16 · diff ↗
0.9-3
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R 2.10.0 released · 2009-10-26
0.9-2
2009-10-12 · diff ↗
0.9-1
2009-06-19 · diff ↗
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R 2.9.0 released · 2009-04-17
0.9-0
2009-03-02 · diff ↗
0.8-9
2009-01-08 · diff ↗
0.8-8
2008-12-15 · diff ↗
0.8-7
2008-11-17 · diff ↗
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R 2.8.0 released · 2008-10-20
0.8-6
2008-09-15 · diff ↗
0.8-5
2008-06-09 · diff ↗
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R 2.7.0 released · 2008-04-22
0.8-4
2008-04-14 · diff ↗
0.8-3
2008-03-03 · diff ↗
0.8-2
2007-12-03 · diff ↗
R
R 2.6.0 released · 2007-10-03
0.8-1
2007-07-16 · diff ↗
0.8-0
2007-05-07 · diff ↗
R
R 2.5.0 released · 2007-04-24
0.7-1
2007-02-11 · diff ↗
0.7-0
2006-11-28 · diff ↗
0.6-1
2006-10-03 · diff ↗
R
R 2.4.0 released · 2006-10-03
0.6-0
2006-09-05 · diff ↗
0.5-1
2006-06-12 · diff ↗
0.5-0
2006-05-02 · diff ↗
R
R 2.3.0 released · 2006-04-24
0.4-1
2006-04-03 · diff ↗
0.4-0
2006-03-13 · diff ↗
0.3-1
2005-11-28 · diff ↗
R
R 2.2.0 released · 2005-10-06
0.3-0
2005-09-26 · diff ↗
0.2-1
2005-05-09 · diff ↗
R
R 2.1.0 released · 2005-04-18
0.1-1
2005-03-30 · diff ↗
0.1-0
2005-03-14
R
R 2.0.0 released · 2004-10-04

Package metadata

First published: 2005-03-14
Total releases: 37 / 21 yrs
License: GPL (>= 2) OSI
Minimum R: ≥ 3.0.0
Bundled data: 65 KB / 7 files
Download size: 280 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Appears in task views

Missing Data Psychometric Models and Methods

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("ltm")

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 ltm version 1.2-0 [Data set]. HJJB, LLC. Data release v2026-08-15. https://doi.org/10.5281/zenodo.21843040

From data release v2026-08-15, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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