Creation of Stratum Orthogonal Arrays R package SOAs version 1.4-1 CRAN Task View: ExperimentalDesign (https://CRAN.R-project.org/view=ExperimentalDesign) Creates stratum orthogonal arrays (also known as strong orthogonal arrays). These are arrays with more levels per column than the typical orthogonal array, and whose low order projections behave like orthogonal arrays, when collapsing levels to coarser strata. Details are described in Groemping (2022) "A unifying implementation of stratum (aka strong) orthogonal arrays" <http://www1.bht-berlin.de/FB_II/reports/Report-2022-002.pdf>. Software Depends: R (>= 3.6.0), DoE.base (>= 1.2) Imports: stats, combinat, FrF2, igraph, lhs (>= 1.1.3), conf.design, sfsmisc, partitions Suggests: testthat (>= 3.0.0) Ulrike Groemping <ulrike.groemping@bht-berlin.de> Comprehensive R Archive Network (CRAN) Ulrike Groemping [aut, cre], Rob Carnell [ctb], Hongquan Xu [ctb] GPL (>= 2) 2025-09-03 application/tgz https://CRAN.R-project.org/package=SOAs doi:10.32614/CRAN.package.SOAs