StructuralEquationModels v0.5.0

Diff since v0.4.2

StructuralEquationModels.jl v0.5.0

This is a large, breaking release centered on a modular redesign of the model/type system to unify single models and collections/multigroup models.

Highlights

• a Sem is now a weighted sum of loss terms, each SEM loss bundling its own observed + implied parts.
• New inference methods: CFI, p-values (z-test) and confidence intervals, parallel bootstrap.
• Multigroup χ²/RMSEA/estimates now match lavaan.
• Optimization backends (NLopt, Proximal) moved to package extensions.
• Data simulation, FIML mean structures, and efficient re-fitting via replace_observed.

Breaking changes

• Type-system & evaluation overhaul.
  • Loss functions are now AbstractLoss/SemLoss; evaluate! is implemented per loss term (no model argument) (#214).
  • SemImply → SemImplied (#235).
  • Multigroup/collections handled by the new Sem term structure (#317).
  • Specification and Variables APIs refactored (#203, #207).
• SemOptimizer API refactor (#299).
• Optimization backends are now extensions — you must using NLopt / using ProximalAlgorithms to enable engine = :NLopt / :Proximal (#228, [#234]).
• Renames: params / param_labels (#253, [#257]); df → dof (#254).
• Multigroup fit statistics now use the per-group Wishart/GLS convention: χ² = Σ_g (N_g−1)·F_g (new :nsamples_corrected default weighting; N−G χ² multiplier for ML/WLS; matching RMSEA). Multigroup ML/WLS results now match lavaan wishart/GLS; single-group results are unchanged except ML RMSEA. FIML is unchanged.

New features

• CFI fit measure (#313).
• Inference: z-test p-values and normal-theory confidence intervals (#316).
• Bootstrap standard errors refactored, with optional parallel fitting (#314).
• replace_observed for collections (#266).

Bug fixes

• Multigroup fit-measure corrections (#311), RMSEA correction, and the χ² multiplier/weighting fix.

Merged pull requests:

• No-op code & docs cleanups (#245) (@alyst)
• build(deps): bump julia-actions/julia-format from 3 to 4 (#264) (@dependabot[bot])
• main into devel (#265) (@Maximilian-Stefan-Ernst)
• Replace observed collections (#266) (@Maximilian-Stefan-Ernst)
• build(deps): bump actions/github-script from 7 to 8 (#269) (@dependabot[bot])
• Main to devel (#278) (@Maximilian-Stefan-Ernst)
• build(deps): bump actions/checkout from 4 to 6 (#287) (@dependabot[bot])
• explicitely import types for extensions (#291) (@Maximilian-Stefan-Ernst)
• workaround for StenoGraph import (#294) (@Maximilian-Stefan-Ernst)
• Update partable syntax (#295) (@Maximilian-Stefan-Ernst)
• Update FormatCheck (#296) (@alyst)
• update concept figures (#297) (@Maximilian-Stefan-Ernst)
• Update action (#298) (@Maximilian-Stefan-Ernst)
• Refactor SemOptimizer API (#299) (@alyst)
• .gh/FormatCheck: run on pull_request (#302) (@Maximilian-Stefan-Ernst)
• Cleanup FIML, enhance em_mvn() (#303) (@alyst)
• Fiml meanstructure argument (#304) (@Maximilian-Stefan-Ernst)
• fix printing of Optim solution (#305) (@Maximilian-Stefan-Ernst)
• require StenoGraphs v0.5; closes [#289] (#306) (@aaronpeikert)
• Update actions on devel (#307) (@Maximilian-Stefan-Ernst)
• remove unused Stenograph exports (#308) (@Maximilian-Stefan-Ernst)
• Update loss checks (#309) (@alyst)
• Update docstring for fit measures (#310) (@alyst)
• Cleanup fitmeasures mg (#311) (@Maximilian-Stefan-Ernst)
• Add CFI (#313) (@Maximilian-Stefan-Ernst)
• refactor bootstrap se and allow parallel fitting (#314) (@Maximilian-Stefan-Ernst)
• update to PrettyTable v3 (#315) (@Maximilian-Stefan-Ernst)
• Convergence, bootstrap, p-values (#316) (@Maximilian-Stefan-Ernst)
• Refactor Sem multi-group support (#317) (@alyst)
• build(deps): bump julia-actions/cache from 2 to 3 (#318) (@dependabot[bot])
• build(deps): bump codecov/codecov-action from 5 to 6 (#319) (@dependabot[bot])
• build(deps): bump actions/github-script from 8 to 9 (#320) (@dependabot[bot])
• build(deps): bump julia-actions/setup-julia from 2 to 3 (#323) (@dependabot[bot])
• build(deps): bump codecov/codecov-action from 6 to 7 (#325) (@dependabot[bot])
• Documentation and bugfixes for 0.5.0 (#329) (@Maximilian-Stefan-Ernst)
• Release 0.5.0 (#330) (@Maximilian-Stefan-Ernst)
• fix macos CI runs (#331) (@Maximilian-Stefan-Ernst)

Closed issues:

• se for WLS and FIML (#57)
• v0.4.1 (#261)
• v0.4.2 (#263)
• sem_fit() was deprecated for fit()? (#267)
• (in)equality constraints via StenoGraphs specification (#270)
• Status message for converged models (#273)
• Error (#274)
• Numerical precision of model-implied covariance matrix (#276)
• Simulate data from a model (#282)
• StenoGraphs has to be loaded manually (#289)