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1.2
date	2026.06.13.00.09.48;	author mef;	state Exp;
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1.1
date	2024.11.12.13.10.50;	author mef;	state Exp;
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1.2
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@(math/R-GPArotation) Updated 2024.3.1 to 2026.4.1

Changes in GPArotation version 2026.4-1:

  o Comprehensive code cleanup across all functions including GPForth,
    GPFoblq, GPFRSorth, GPFRSoblq, .GPA_RS_engine, vgQ rotation
    criterion functions, Random.Start, and S3 print/summary methods.
    All existing code should run without modification.

  o GPForth and GPFoblq: pre-allocated iteration Table replaces rbind
    growth; step size variable renamed from 'al' to 'alpha'; Table
    column names set at allocation. Legacy implementations retained as
    unexported GPForth.legacy and GPFoblq.legacy for historical
    reference.

  o print.GPArotation and summary.GPArotation: factor sorting and sign
    correction now handled by internal helper .sortGPALoadings, adapted
    from factanal:::sortLoadings (R Core Team). This ensures print and
    summary produce consistent sorted output. The sign correction
    criterion has changed from sign(colSums(L^3)) to colSums(L) < 0,
    matching factanal convention. Results are numerically equivalent
    in all tested cases.

  o print.GPArotation and print.summary.GPArotation: digits argument
    now correctly controls decimal places in loadings and structure
    matrices.

  o print.summary.GPArotation: structure matrix now correctly displays
    factor names as column headers rather than [,1] [,2] [,3].

  o vgQ criterion functions: the Method string has been improved for
    consistency in selected cases (e.g. "Simplimax (k=8)", "Varimax",
    "Varimin", "Bentler"). The criterion value (f) and gradient (Gq)
    are unaffected.

  o Documentation: clarifications throughout, expanded references
    with doi throughout; improved examples including two-step vs
    single-step factanal comparison.

 o  Added dataset CCAI: 14x14 correlation matrix (CCAI_R), factor pattern matrix
    (CCAI_pattern), and factor intercorrelations (CCAI_Phi) for the
    Climate-Friendly Purchasing Choices domain of the Climate Change
    Action Inventory.

  o Three vignettes: GPA1guide (main guide, restructured),
    GPA2local (local minima diagnostics), GPA3bifactor (bifactor
    rotation and reliability coefficients).

  o Unit tests added and expanded: Table structure, single-factor error
    handling, random starts, factor sorting, factanal R >= 4.5.1
    regression, numerical equivalence of updated vs legacy GPForth and
    GPFoblq, and vgQ criterion function regression tests.

  o box20 deprecated. Use box26 instead. box20 will be removed in a
    future version.

  o Removed defunct SourceForge URL from DESCRIPTION.

Changes in GPArotation version 2025.3-1:

  o Added Lp rotation (via Xinyi Liu), including examples, help file,
    and tests.

  o Added automated tests for error messages.

  o Edits to the manual pages.
@
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@


1.1
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@math/R-GPArotation: import R-GPArotation-2024.3.1

Gradient Projection Algorithms for Factor Rotation. For details see
?GPArotation. When using this package, please cite: Bernaards and
Jennrich (2005) <doi:10.1177/0013164404272507>. "Gradient Projection
Algorithms and Software for Arbitrary Rotation Criteria in Factor
Analysis".
@
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@