Description Usage Arguments Details Value Warning Note Author(s) References See Also Examples

Patterson (1951) combined balanced incomplete block designs (BIBDs) with Williams designs to get carryover balanced generalized Youden designs.

1 | ```
williams.BIB(d)
``` |

`d` |
A matrix representing a BIBD. Rows represent blocks (subjects). |

For each row of the design, a Williams design is constructed using the treatments of that row.
The rows of the resulting designs are then combined.
The treatments are numbered 1,...,*trt*. The entry *(i,j)*
of the design corresponds to the treatment the *i*-th subject gets in the *j*-th period.

A matrix representing the experimental design.

The resultig design is only balanced properly if the input design actually is a BIBD.
This is NOT checked automatically. You have to do this by yourself, e.g. by applying `isGYD`

to your design.

BIBDs may be generated using `find.BIB`

.

Oliver Sailer

Patterson, H.D. (1951): Change-over trials. Journal of the Royal Statistical Society B 13, 256-271.

Wakeling, I.N. and MacFie, H.J.H. (1995): Designing consumer trials balanced for first and higher orders of carry-over effect when only a subset of k samples from t may be tested. Food Quality and Preference 6, 299-308.

`get.plan`

, `isGYD`

, `find.BIB`

, `williams`

1 2 3 4 | ```
d <- matrix( rep(1:3,each=2), ncol=2)
# # check for balance
# isGYD(d)
williams.BIB(d)
``` |

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