Package: exactcond
Type: Package
Title: Exact Conditional Reference Distributions for Tables and
        Selected Linear Models
Version: 0.2.0
Authors@R: person("M. Theodor", "Loots", role = c("aut", "cre"), email = "theo.loots@gmail.com",
                    comment = c(ORCID = "0000-0001-7722-3913"))
Description: Reference distributions that are exact at every sample
        size, obtained by conditioning on a statistic sufficient for
        the nuisance parameter rather than by appealing to an
        asymptotic approximation. Two forms of conditioning are
        supplied. For a two-way table the row and column totals are
        sufficient for the marginal parameters, so conditioning on both
        margins leaves the Fisher-Yates law, sampled here exactly by
        random permutation of the column labels; statistics include the
        linear-by-linear association of Goodman (1979)
        <doi:10.1080/01621459.1979.10481650> and, for nominal rows
        against an ordinal column, the dispersion of the row mean
        scores, whose components are the group contrasts themselves. A
        two-table form conditions further on the total score to cancel
        a common association parameter, giving a nuisance-free test
        that two tables share it. For a linear model under a null in
        which the tested structure is absent, a statistic invariant to
        the coefficients and the error scale depends on the data only
        through the residual direction, which is uniform on the sphere
        of the residual space; the reference stays exact when the
        statistic is maximised over candidate structures, and so
        remains valid after a spatial weight matrix has been chosen by
        fit. Permutation tests for a battery of categorical items and
        for differences between correlation networks follow the
        nonparametric combination of Pesarin and Salmaso (2010)
        <doi:10.1002/9780470689516>, with exchangeability blocks as in
        Winkler et al. (2014) <doi:10.1016/j.neuroimage.2014.01.060>.
        Every replicate draws from its own stream, so results do not
        depend on the thread count. The same C sources back the
        'Python' package 'exactcond'.
URL: https://github.com/mtloots/exactcond
BugReports: https://github.com/mtloots/exactcond/issues
License: GPL-3
Encoding: UTF-8
Imports: stats
NeedsCompilation: yes
Config/testthat/edition: 3
Suggests: knitr, rmarkdown, testthat (>= 3.0.0)
VignetteBuilder: knitr
Config/roxygen2/version: 8.0.0
Repository: https://mtloots.r-universe.dev
Date/Publication: 2026-10-12 09:03:37 UTC
RemoteUrl: https://github.com/mtloots/exactcond
RemoteRef: HEAD
RemoteSha: 4f13e1ad2622783ebcb68a577a57b1e8240dfddf
Packaged: 2026-10-22 10:50:06 UTC; root
Author: M. Theodor Loots [aut, cre] (ORCID:
    <https://orcid.org/0000-0001-7722-3913>)
Maintainer: M. Theodor Loots <theo.loots@gmail.com>