Version 1.4

CRAN release. Main change: Spattern calculation has been made more efficient by being more selective about which columns of model matrices are needed for the requested maximum weight, and by using full-factorial-based contrasts instead of the power coding that was previously used (details in Grömping 2023b).

Version 1.3

CRAN release: implemented the stratification pattern that was proposed by Tian and Xu (2022)
and whose implementation is described in Groemping (2022b) (important functions: Spattern and dim_wt_tab;
important supporting function: contr.Power yields contrasts for factors with s^el levels)

Version 1.2

CRAN release: Improvements to SOAs2plus_regular - more orthogonal columns possible, faster creation of matrix B, possibility to opt for not attempting orthogonality (for speed in very large problems for which one creates an unoptimized SOA, or for the possibility of achieving better space-filling)

Version 1.1

CRAN release: main change is the introduction of guide functions guide_SOAs and guide_SOAs_from_OA

v1.0

Submitted to CRAN