Multiple refactorings reformatted#193

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alyst wants to merge 48 commits intoStructuralEquationModels:develfrom

alyst:optim_ext_ram_reformatted

Commits on Feb 4, 2025

WIP SemImplyState

Alexey Stukalov
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minus2ll(): cleanup method signatures
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fix chi2
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fix RMSEA

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p_values(): use ccdf()

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FIML: SemFIMLPattern
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declare cov matrices symmetric
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EM: optimizations

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start_simple(SemEnsemble): simplify

Alexey Stukalov
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RAM: reuse sigma array

Alexey Stukalov
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RAM: optional sparse Sigma matrix

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RAM: don't need to copy (I-A)

Alexey Stukalov
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ML: refactor to minimize allocs
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add PackageExtensionCompat

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variance_params(SEMSpec)

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predict_latent_vars()
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lavaan_model()

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EM: move code refs to docstring

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EM MVN: decouple from SemObsMissing
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test/fiml: set EM MVN rtol=1e-10
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SemObsMissing: fix obs_mean() test
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MissingPattern: transpose data

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EM MVN: report rel_error if not converged

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EM: max_nsamples_em opt to limit samples used
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EM: optimize mean handling
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test_grad/hess(): check that alt calls give same results

Alexey Stukalov
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start_simple(): code cleanup
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start_simple(): start vals for lat and obs means

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observed_vars(RAMMatrices; order): rows/cols order
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observed_var_indices(::RAMMatrices; order=:columns)

Alexey Stukalov
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move sparse mtx utils to new file
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EM: min_eigval kw for regularization
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fix batch_sym_inv_updates() ws
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reorder_observed_vars!(spec) method
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vech() and vechinds() functions
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SemImplied/SemLossFun: drop meanstructure kwarg
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RAMMatrices(): ctor to replace params

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RAMSymbolic: rename _func to _eval!
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md ws fixes
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use `@printf` to limit signif digits printed
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ML/FIML: workaround generic_matmul issue
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refactor Sem, SemEnsemble, SemLoss
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ProxAlgo: fix doc typo
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test/Proximal: move usings to the central file
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tests: move usings in the top file
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remove multigroup2 tests
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tests: revert kwless ctors
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BlackBoxOptim.jl backend support
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