Description Usage Format Details Note Author(s) References See Also

A balanced 1-spread of PG(3,2) obtained via cyclic construction

1 |

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=(A,CD,ACD)*, *f_2 = (C,ABCD, ABD)*, *f_3 = (D,B, BD)*, *f_4 = (ABC,AD, BCD)* and *f_5=(AC,AB,BC)*.

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.

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