Package: ebrahim.gof
Type: Package
Title: Goodness-of-Fit and Calibration Tests for Logistic Regression
Version: 2.7.0
Date: 2026-09-08
Authors@R: person(given = "Ebrahim Khaled", family = "Ebrahim",
                  email = "ebrahimkhaled@alexu.edu.eg",
                  role = c("aut", "cre"),
                  comment = c(ORCID = "0009-0006-7839-8778"))
Maintainer: Ebrahim Khaled Ebrahim <ebrahimkhaled@alexu.edu.eg>
Description: Provides a unified battery of goodness-of-fit and calibration
    tests for binary logistic regression, runnable in a single call via
    'run.all.gof()'. Around twenty-five tests spanning five decades of
    literature are aggregated and grouped by the departure each is built to
    detect: global and standardized statistics, partition tests such as
    Hosmer-Lemeshow, directed and covariate-space tests, smoothing and
    resampling tests, and calibration tests. Each is obtained from its own
    package where installed and attributed to its authors. The package also
    implements the author's own procedures for sparse data, where the
    Hosmer-Lemeshow test loses power: the omnibus Ebrahim-Farrington test
    'ef.gof()', the directed 'edge.gof()' and its covariate-space variant
    'cdef.gof()', the Cauchy-combination ensemble 'edges.gof()', 'DeepGOF-1'
    (a pretrained convolutional statistic whose level comes from the analyst's
    own parametric bootstrap rather than from the network), and 'legoft()'
    (a frozen-weight combination whose weights are fixed offline and ship
    frozen, so two analysts obtain the same p-value). For penalized (ridge)
    logistic regression, where shrinkage biases the fitted probabilities and
    invalidates the usual chi-squared references, the corrected statistics are
    referred either to a prepivoting bootstrap by 'shrink.gof()' or to a
    closed-form reference by 'calm.gof()', which needs a single fit and is
    validated for designs in which the number of predictors is a sizeable
    fraction of the sample size. For more details see Hosmer (1980)
    <doi:10.1080/03610928008827941> and Farrington (1996)
    <doi:10.1111/j.2517-6161.1996.tb02086.x>.
License: GPL-3
URL: https://ebrahimkhaled.github.io/ebrahim.gof/,
        https://github.com/ebrahimkhaled/ebrahim.gof
BugReports: https://github.com/ebrahimkhaled/ebrahim.gof/issues
Depends: R (>= 3.5.0)
Imports: CompQuadForm, parallel, stats
Suggests: testthat (>= 3.0.0), knitr, rmarkdown, ResourceSelection,
        ggplot2, statmod, mgcv, BAGofT, givitiR, callr, TH.data
Encoding: UTF-8
LazyData: true
RoxygenNote: 7.3.2
VignetteBuilder: knitr
NeedsCompilation: no
Packaged: 2026-09-08 17:06:06 UTC; ebrah
Author: Ebrahim Khaled Ebrahim [aut, cre] (ORCID:
    <https://orcid.org/0009-0006-7839-8778>)
Repository: CRAN
Date/Publication: 2026-09-09 07:50:02 UTC
Built: R 4.5.2; ; 2026-09-09 09:44:59 UTC; unix
