ffDesMatrix {BHH2} | R Documentation |
The function generates the design matrix provided the number of 2-levels design factors and defining relations.
ffDesMatrix(k, gen = NULL)
k |
numeric. The number of 2-levels design factors in the designs. |
gen |
list. If NULL (default) a full factorial design is
generated. Otherwise, each component of the list is a numeric vector of
corresponding to each of the defining relations used to compose the
design. See Details. |
A defining relation is declared by a vector where the first entry
corresponds to the left hand side (LHS) of the defining
equation. For example, if k=5
, and gen=list(c(-5,1,2,3,4))
,
then the defining equation is -5=1*2*3*4. A full 2-levels (-1,1)
factorial design is generated. For each defining relation the LHS column
is replaced by the corresponding columns product. At the end repeated
runs are removed from the matrix.
The function returns a 2-levels design matrix with k
columns.
Ernesto Barrios
conf.design
of the conf.design package.
ffDesMatrix(5) # Full 2^5 factorial design ffDesMatrix(5,gen=list(c(5,1,2,3,4))) # 2^(5-1) factorial design ffDesMatrix(5,gen=list(c(4,1,2),c(-5,1,3))) # 2^(5-2) factorial design