direct.sum {conf.design} | R Documentation |
Constructs the direct sum of two or more designs. Each plot of one design is matched with every plot of the other. (This might also be called the Cartesian product of two designs).
direct.sum(D1, D2, ..., tiebreak=letters)
D1 |
First component design. |
D2 |
Second component design. |
... |
Additional component designs, if any. |
tiebreak |
Series of characters or digits to be used for breaking ties (or repeats) in the variable names in the component designs. |
Each plot of one design is matched with every plot of the other, and so on recursively.
The direct sum of all component designs.
None.
conf.design, fac.design, fractionate
# Generate a half replicate of a 2^3 x 3^2 experiment. The factors are # to be A, B, C, D, E. The fractional relation is to be I = ABC and the # DE effect is to be confounded with blocks. # First construct the 2^3 design, confounded in two blocks: d1 <- conf.design(c(1,1,1), p=2, treatment.names=LETTERS[1:3]) # Next the 3^2 design, with DE confounded in blocks: d2 <- conf.design(c(1,1), p=3, treatment.names=LETTERS[4:5]) # Now extract the principal block from the 2^3 design and form the direct # sum withthe 3^2 design dsn <- direct.sum(d1[d1$Blocks=="0",], d2)