Package: NSCA
Type: Package
Title: Necessary and Sufficient Condition Analysis
Version: 0.4.5
Date: 2026-09-30
Authors@R: c(
    person("Young", "Chan", email = "youngchanresearcher@gmail.com",
           role = c("aut", "cre"))
    )
Description: Tests and quantifies bivariate statements in which a
        condition is both necessary and sufficient for an outcome.
        Necessity and sufficiency are estimated as two empty-space
        frontiers on diagonally opposite corners of the same scatter
        plot, using the 'NCA' package of Dul (2016)
        <doi:10.1177/1094428115584005> for the necessity side and
        'SCAtools' for the sufficiency side. The two empty zones and
        the region between them tile the analytic scope, which yields
        the reported areas as one identity rather than as separate
        definitions: a weakest-component effect, a normalised geometric
        mean of the two components, the share of the scope the claims
        jointly rule out, and the data zone they still admit. The
        conjunction is decided by an intersection-union combination of
        the two directional permutation tests, optionally driven by a
        single shared permutation sequence so that a statistic of both
        components can also be tested. These are random-pairing screens
        rather than direct tests of a causal necessary-and-sufficient
        relation, no magnitude benchmarks are asserted for the joint
        indices, and a dual-threshold table separates outcome levels
        that are out of reach, admitted, or guaranteed. An ordinary
        least-squares line can be drawn alongside the two frontiers as
        a central-tendency reference; it is an average-effect summary
        and is never treated as a component of either claim.
License: GPL (>= 3)
Encoding: UTF-8
Depends: R (>= 3.5.0)
Imports: ggplot2 (>= 3.4.0), NCA (>= 5.0.2), SCAtools (>= 0.4.1),
        stats, utils
Suggests: testthat (>= 3.0.0)
Config/testthat/edition: 3
URL: https://github.com/youngchanresearcher/NSCA
BugReports: https://github.com/youngchanresearcher/NSCA/issues
RoxygenNote: 7.3.2
NeedsCompilation: no
Packaged: 2026-10-20 06:24:20 UTC; root
Author: Young Chan [aut, cre]
Maintainer: Young Chan <youngchanresearcher@gmail.com>
Config/pak/sysreqs: cmake make libicu-dev libuv1-dev libssl-dev
Repository: https://youngchanresearcher.r-universe.dev
Date/Publication: 2026-10-10 13:51:48 UTC
RemoteUrl: https://github.com/cran/NSCA
RemoteRef: HEAD
RemoteSha: 6e08781c5b8682443c64cb7010f56678badb2277