R Observatory: Metrics for diffIRT version 1.5

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

diffIRT

1.5Package record

Diffusion IRT Models for Response and Response Time Data

0packages dependsuggested by 1

3.6Kdownloads / year

–test coverage

9/13flavors OK

Overview

About

Maintained by Dylan MolenaarCRAN page ↗

Package to fit diffusion-based IRT models to response and response time data. Models are fit using marginal maximum likelihood. Parameter restrictions (fixed value and equality constraints) are possible. In addition, factor scores (person drift rate and person boundary separation) can be estimated. Model fit assessment tools are also available. The traditional diffusion model can be estimated as well.

Install

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

install.packages("diffIRT", 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-diffirt

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-diffIRT

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-diffIRT

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

4NOTE9OK

Check messages

NOTECRAN incoming feasibilityr-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc

Maintainer: ‘Dylan Molenaar <d.molenaar@uva.nl>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Dylan",
                    family = "Molenaar",
                    role = c("aut", "cre"),
                    email = "d.molenaar@uva.nl")
as necessary.

Package CITATION file contains call(s) to old-style personList() or
as.personList().  Please use c() on person objects instead.
Package CITATION file contains call(s) to old-style citEntry().  Please
use bibentry() instead.

NOTEcompiled coder-devel-linux-x86_64-fedora-clang, r-devel-linux-x86_64-fedora-gcc

File ‘diffIRT/libs/diffIRT.so’:
  Found no calls to: ‘R_registerRoutines’, ‘R_useDynamicSymbols’

It is good practice to register native routines and to disable symbol
search.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual.

CRAN check page ↗

Slowest check: 2.1 min · r-devel-windows-x86_64

Status changes

NOTE9 OK, 4 NOTENow
NOTE10 OK, 4 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 1.5

READMENoVignettesNoNEWSNoCitation fileYes · cites a publicationWebsitenot declared in DESCRIPTION

Help pages: 12
Examples that run: 25%3 run in a plain check · 9 never run
Exported functions with examples: 100%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 75%

How these are measured

Downloads

3.6K

CRAN downloads in the past year

Rank #14,431 · ~10/day · ~302/mo

Releases R versions

Daily download trend is not available in this view yet.

31930 days

83090 days

3.6K1 year

Compare downloads with other packages →

Also on365 r2u7 autocran

How downloads are counted

Dependencies

Declared dependencies

1 external dependency (excludes base and recommended)

Installing diffIRT adds 1 package (1 with compiled code, 91 KB of source tarballs). Heaviest: statmod 91 KB.

Depends (1)

statmod

Imports (0)

none

LinkingTo (0)

none

Suggests (0)

none

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

0direct

0indirect

Suggested by 1

Suggests, most downloaded first

eyeprocess

How these are counted

Code & Tests

Datasets

People & History

People (from the free-text Author field) (1)

Dylan Molenaar

Maintainer since 1.2 (2013)

Releases (3)

Pick two releases to compare their code metrics.

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
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
R
R 3.3.0 released · 2016-05-03
1.5Latest
record
2015-08-14 · current release · diff ↗
R
R 3.2.0 released · 2015-04-16
1.4
record
2014-06-05 · diff ↗
R
R 3.1.0 released · 2014-04-10
1.2
record
2013-11-05

Show 1 earlier eventHide 1 earlier event

R
R 3.0.0 released · 2013-04-03

Package metadata

First published: 2013-11-05
Total releases: 3 / 13 yrs
License: GPL-2 OSI
Bundled data: 87 KB / 3 files
Download size: 111 KB

Cite

Cite this package

Run in R for the authors' entry:

citation("diffIRT")

The package provides a citation file, so citation() returns the authors' own entry.

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 diffIRT version 1.5 [Data set]. HJJB, LLC. Data release v2026-10-25. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-25, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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