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Tests whether a condition is both necessary and sufficient for an outcome, that is, whether the outcome cannot be reached without the condition and is guaranteed in its presence. Such a claim implies that two diagonally opposite corners of the condition-outcome scatter plot contain no observations. The package estimates both boundaries with the same data, scope and frontier technique, reports the effect size and permutation test of each, and indicates joint support only when both components are supported. The two components are summarized by the weaker effect, a balanced combination and the proportion of the scope that the two claims jointly rule out. A dual-threshold table gives, for each outcome level, the condition level it requires, the level sufficient for it, and the interval between them. Results can be compared with regression slopes. The package also provides plots, influential-case diagnostics, scope-sensitivity and resampling checks, and simulation and power analysis for planning studies. The two sides are estimated with the 'NCA' and 'SCAtools' packages.
| Version: | 0.5.2 |
| Depends: | R (≥ 3.5.0) |
| Imports: | ggplot2 (≥ 3.4.0), NCA (≥ 5.0.2), SCAtools (≥ 0.5.2), stats, utils |
| Suggests: | testthat (≥ 3.0.0) |
| Published: | 2026-10-26 |
| DOI: | 10.32614/CRAN.package.NSCA |
| Author: | Young Chan [aut, cre] |
| Maintainer: | Young Chan <youngchanresearcher at gmail.com> |
| BugReports: | https://github.com/youngchanresearcher/NSCA/issues |
| License: | GPL (≥ 3) |
| URL: | https://github.com/youngchanresearcher/NSCA |
| NeedsCompilation: | no |
| Citation: | NSCA citation info |
| Materials: | README, NEWS |
| CRAN checks: | NSCA results |
| Reference manual: | NSCA.html , NSCA.pdf |
| Package source: | NSCA_0.5.2.tar.gz |
| Windows binaries: | r-devel: NSCA_0.5.2.zip, r-release: NSCA_0.5.2.zip, r-oldrel: NSCA_0.5.2.zip |
| macOS binaries: | r-release (arm64): NSCA_0.5.2.tgz, r-oldrel (arm64): NSCA_0.5.2.tgz, r-release (x86_64): NSCA_0.5.2.tgz, r-oldrel (x86_64): NSCA_0.5.2.tgz |
| Old sources: | NSCA archive |
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