Changes in version 1.6 (2026-09-15)                   

New features

  - qrfactor() gains a rotation argument (default FALSE). Set rotation =
    TRUE (or "varimax") to varimax-rotate the retained factors to simple
    structure; the default keeps the classical unrotated solution, so
    existing results are unchanged. When rotation is requested the same
    orthogonal rotation is applied to the R-mode and Q-mode loadings, so
    both modes remain on one common set of axes and the scores, combined
    loadings, appended index columns and all biplots/maps rotate
    consistently. The eigenvectors, eigenvalues and PCA loadings are
    left unrotated. The fitted object now also carries rotation,
    unrotated.r.loading and unrotated.q.loading.

CRAN policy compliance

  - The plot() method no longer leaves the user's graphics state
    changed: par() is captured on entry and restored with on.exit().

  - The analysis views (type = "cluster", "anova", "region", "admin",
    "diagnose") no longer write statistical tables to the console
    unconditionally. They are silent by default and print only when the
    new plot(..., verbose = TRUE) argument is set; the print()/summary()
    methods are unaffected.

  - Quoted software and package names ('qrfactor()', 'plot()', 'ESRI')
    in the DESCRIPTION, and rewrote the ?qrfactor examples so the fast
    data-frame workflow runs unwrapped and only the shapefile / map
    examples (which need sf/sp) are under \donttest{}. The stale
    readOGR() example call was removed.

                         Changes in version 1.5                         

Restoration release. qrfactor was archived from CRAN in 2018; this
version repairs it for current R and CRAN.

Bug fixes

  - Registered the S3 methods (qrfactor.default, print.qrfactor,
    summary.qrfactor, plot.qrfactor) in NAMESPACE. The archived version
    exported them with exportPattern(".") but never registered them, so
    qrfactor() failed with no applicable method for 'qrfactor' applied
    to an object of class "data.frame". This was the cause of the CRAN
    archival.

  - Fixed a crash under R >= 4.2 in the map plots, where a condition of
    length greater than one is now an error rather than a silent
    first-element take.

Dependency changes

  - Replaced retired spatial packages. Shapefiles are now read with
    sf::st_read() instead of rgdal::readOGR(), and the maptools and
    mgraph dependencies were removed. A small compatibility layer
    bridges the sf/sp object differences.

  - Depends: on contributed packages moved to Imports:; base-R functions
    are now explicitly imported via importFrom().

Documentation

  - Rewrote the DESCRIPTION (complete-sentence Description, modern
    Authors@R).