dist.structure: Structured Random Variables for Reliability System Distributions

Extends the 'algebraic.dist' distribution algebra to random variables with internal structure: coherent reliability systems decomposed into components arranged by a structure function (series, parallel, k-out-of-n, bridge, and arbitrary topologies via minimal path sets). Every 'dist_structure' object is a 'dist', so the full distribution algebra (mean, vcov, sampler, surv, cdf) works automatically via default methods that compose component-level distributions through the topology. Adds structural queries: structure function evaluation, minimal path and cut sets, system signature, critical states, dual, Birnbaum structural importance, and system reliability. Topology shortcut constructors (series_dist, parallel_dist, kofn_dist, bridge_dist) produce ready-to-use dists from component dists and a chosen structure.

Version:	0.5.0
Depends:	R (≥ 4.1.0)
Imports:	algebraic.dist, stats, utils
Suggests:	testthat (≥ 3.0.0), knitr, rmarkdown, spelling, withr
Published:	2026-05-12
DOI:	10.32614/CRAN.package.dist.structure
Author:	Alexander Towell [aut, cre]
Maintainer:	Alexander Towell <lex at metafunctor.com>
BugReports:	https://github.com/queelius/dist.structure/issues
License:	MIT + file LICENSE
URL:	https://github.com/queelius/dist.structure
NeedsCompilation:	no
Language:	en-US
Materials:	README, NEWS
CRAN checks:	dist.structure results

Documentation:

Reference manual:	dist.structure.html , dist.structure.pdf
Vignettes:	Coherent systems (source, R code) Composition and substitution (source, R code) Distribution interface (source, R code) Getting started with dist.structure (source, R code) Implementing a dist_structure subclass (source, R code) Importance measures (source, R code) Non-coherent systems: cold standby (source, R code)

Downloads:

Package source:	dist.structure_0.5.0.tar.gz
Windows binaries:	r-devel: dist.structure_0.5.0.zip, r-release: dist.structure_0.5.0.zip, r-oldrel: dist.structure_0.5.0.zip
macOS binaries:	r-release (arm64): dist.structure_0.5.0.tgz, r-oldrel (arm64): dist.structure_0.5.0.tgz, r-release (x86_64): dist.structure_0.5.0.tgz, r-oldrel (x86_64): dist.structure_0.5.0.tgz

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