spreadn4t2a {IsoCheck} | R Documentation |
A balanced 1-spread of PG(3,2) obtained via cyclic construction
data(spreadn4t2a)
The spread is formatted as a 3-dimensional array, where the [i,j,k]
-th element indicates whether or not the i
th basic factor is present in the j
th effect of the k
th flat of the spread.
The spread consists of five subspaces f_1, f_2, f_3, f_4, f_5
given by
f_1=(D,BC,BCD)
, f_2 = (C,AB, ABC)
, f_3 = (B,ACD, ABCD)
, f_4 = (A,BD, ABD)
and f_5=(CD,AC,AD)
.
In R, the data must be loaded using the data
function.
Neil Spencer, Pritam Ranjan, Franklin Mendivil
Spencer, N.A., Ranjan, P., and Mendivil, F., (2019), "Isomorphism Check for 2^n
Factorial Designs with Randomization Restrictions", Journal of Statistical Theory and Practice, 13(60),1-24 [https://doi.org/10.1007/s42519-019-0064-5]
checkSpreadIsomorphism
for checking the isomorphism of balanced spreads.
checkStarIsomorphism
for checking the isomorphism of balanced covering stars.