Extended Structural Equation Modelling
Overview
Create structural equation models that can be manipulated programmatically. Models may be specified with matrices or paths (LISREL or RAM) Example models include confirmatory factor, multiple group, mixture distribution, categorical threshold, modern test theory, differential Fit functions include full information maximum likelihood, maximum likelihood, and weighted least squares. equations, state space, and many others. Support and advanced package binaries available at https://openmx.ssri.psu.edu. The software is described in Neale, Hunter, Pritikin, Zahery, Brick, Kirkpatrick, Estabrook, Bates, Maes, & Boker (2016) doi:10.1007/s11336-014-9435-8.
Install
Health
NOTERd contentsr-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc
Rd files without \usage: ‘mxAlgebraObjective.Rd’ ‘mxFIMLObjective.Rd’ ‘mxMLObjective.Rd’ ‘mxRAMObjective.Rd’ ‘mxRObjective.Rd’ ‘mxRowObjective.Rd’ \arguments should not be documented without \usage.
- NOTE11 OK, 2 NOTENow
- NOTE12 OK, 1 NOTE2026-07-11
- OK13 OK2026-05-03
- WARNING12 OK, 1 WARNING2026-04-30
- OK12 OK2026-04-25
- ERROR11 OK, 3 ERROR2026-03-10
Documentation
- Help pages
- 332includes a package overview page
- Examples that run
- 98%157 run in a plain check · 3 only when donttest examples are enabled (R CMD check --as-cran) · 1 never run
- Exported functions with examples
- 79%
- Documented parameters
- 99%
- Return-value docs
- 7%
- Help pages citing references
- 35%
Also includes 68 demo scripts (run with demo())
Downloads
Repository
- PRs merged (all time)
- 81%
- Median days to close, 50 most recently updated closed issues
- 582
- Median days to close, 50 most recently updated closed PRs
- 5
Stars over time
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Issues over time
PRs over time
Commits over time
12 development-tooling and community-health practices detected across 8 families in the upstream repository
Checks run against github.com/openmx/openmx on 2026-10-18.
The R CMD check workflow runs on Linux
GitHub Pages site last deployed 2026-10-16
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Dependencies
Installing OpenMx adds 11 packages (9 with compiled code, 24 MB of source tarballs). Heaviest: BH 14 MB, StanHeaders 2.5 MB, Rcpp 1.8 MB.
Code & Tests
Datasets
People & History
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Previously maintained by Joshua N. Pritikin (2.2.2 to 2.21.12).
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- RR 4.6.0 released · 2026-04-24
- 2.22.11Latest
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- RR 4.5.0 released · 2025-04-11
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- RR 4.4.0 released · 2024-04-24
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- RR 4.3.0 released · 2023-04-21
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- RR 4.2.0 released · 2022-04-22
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- RR 3.6.0 released · 2019-04-26
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- RR 3.3.0 released · 2016-05-03
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- 2.2.62015-07-17 · diff ↗
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- 2.2.22015-05-19
- RR 3.2.0 released · 2015-04-16
Package metadata
- First published
- 2015-05-19
- Total releases
- 62 / 11 yrs
- License
- Apache License (== 2.0) · relicensed from GPL (>= 3) in 2.6.7
- Minimum R
- ≥ 3.5.0
- Bundled data
- 945 KB / 36 files
- Download size
- 3.7 MB
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