guide_SOAs | R Documentation |
Utility function for inspecting available SOAs for which the user need not provide an OA
guide_SOAs(s = 2, el = 3, m = NULL, n = NULL, ...)
s |
required (default: 2); prime or prime power on which the SOA is based |
el |
required (default: 3); the power to which |
m |
the number of columns needed (optional) |
n |
the maximum number of runs that are acceptable (optional); |
... |
currently unused |
The function provides the possible creation variants of an
SOA that has m
columns in s^el
levels in up to n
runs.
It is permitted to specify m
OR n
only; in that case the function
provides constructions with the smallest n
or the largest m
,
respectively.
If both m
and n
are omitted, the function returns
the smallest possible (O)SOA constructions for s^el
levels
that can be obtained without providing an OA.
The function returns a data frame, each row of which contains a possibility; if no SOAs exist, the data.frame has zero rows. There is example code for constructing the SOA. Code details must be adjusted by the user (see the documentation of the respective functions). #'
Ulrike Groemping
For full detail, see SOAs-package
.
Groemping (2023a)
He, Cheng and Tang (2018)
Li, Liu and Yang (2021)
Shi and Tang (2020)
Zhou and Tang (2019)
guide_SOAs_from_OA
## guide_SOAs
## There is a Zhou and Tang type SOA with 4-level columns in 8 runs
guide_SOAs(2, 2, n=8)
## There are no SOAs with 8-level columns in 8 runs
guide_SOAs(2, 3, n=8)
## What SOAs based on s=2 in s^3 levels with 7 columns
## can be construct without providing an OA?
guide_SOAs(2, 3, m=7)
## pick the Shi and Tang family 3 design
myST_3plus <- SOAs_8level(n=32, m=7, constr='ShiTang_alphabeta')
## Note that the design has orthogonal columns and strength 3+,
## i.e., very good balance properties.
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