Changes in version 1.4-1 (2025-09-03)                  

    o   provided a package anchor for two \link{} targets

    o   included fastSP and fastSP.K functions based on code from Tian and Xu 2023+,
	with substantial modifications to fastSP (eventually remove unnecessary helper
	functions and possibly also fastSP.K entirely)

                  Changes in version 1.4 (2023-08-10)                   

    o   modified Spattern calculations to use full factorial based coding instead
	of the power coding, because this is faster and also works for non-prime
	and non-prime-power s

    o   bug fix to Spattern: For a few cases, an individual weight for a main effect column
	was too large with the old calculation method, e.g. for column 124 with s=5,
	the weight was 4 instead of 3, due to numeric glitches
	(ceiling(log(124+1, base=5)) is 4).

    o   removed iterators and itertools from imports field of DESCRIPTION

    o   excluded documentation of internal function levels.no, and added an error
	message for the unlikely event that someone attempts to call base::levels
	on an object of class no

                  Changes in version 1.3 (2022-10-03)                   

    o   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)

                  Changes in version 1.2 (2022-08-05)                   

    o   modified function createAB and documentation in SOAs2plus_regular:
	the He, Cheng and Tang (2018) strength 2+ SOAs now
	have orthogonal columns more often, because the columns for matrix B
	are selected from all columns that are not used for A
	(instead of only the columns that were not eligible for A).
	Users who need the previous behavior for reproducing a design
	from earlier package versions can use the argument old.

    o   sped up the selection of columns for matrix B in case orthogonal
	columns are requested (work directly with coefficient matrix instead
	of using function length3 from package DoE.base)

    o   added an internal function createAB_fast for
	SOAs2plus_regular: this bypasses orthogonality requests in order
	to obtain a fast solution or to forsake orthogonality in the hope
	of improved space-filling (argument orth)

                  Changes in version 1.1 (2022-06-06)                   

    o   added functions guide_SOAs and guide_SOAs_from_OA
	for providing guidance about implemented SOA constructions

    o   various improvements of documentation, and update of references

    o   BcolsFromBcolllist: changed vertex attributes to FALSE and TRUE
	instead of 0 and 1, in order to avoid a warning from package igraph

    o   Bug fix: function OSOAs_hadamard did not work for n=8

    o   Bug fix: handling of s in SOAs2plus_regular had a bug
	(leading to failure for s=9, because 9 was treated as a prime).
	Now, SOAs2plus_regular, SOA2plus_regulart and createAB
	(file utilitiesCreate.R) all have the same requirements for s:
	primes up to 19, powers of 2 up to 32, powers of 3 up to 27
	(presumably, the larger numbers do not really work well,
	but are in principle possible)

                 Changes in version 1.0-1 (2021-12-16)                  

    o   expanded description in DESCRIPTION file, and added a reference

    o   changed argument F to Fhat in internal function optimize

    o   made a few changes to the documentation, as requested by CRAN

    o   corrected a miswrite in a reference for createAB

                         Changes in version 1.0                         

    o   first version submitted to CRAN