This class of objects are factors in the
rsm.design
Objects generated by
rsm.design
.
An object of class
"rsm.factor"
represents a single variable in an
rsm.design
object.
The class
"rsm.factor"
has methods for the following generic functions:
[
[<-
print
summary
Class
"rsm.factor"
does not inherit from any other class
The
"rsm.factor"
object is implemented as a numeric vector
with the following attributes
If
x
has 3 or 5 unique values the returned value is computed as follows.
The cube points, a and b, of the vector
x
are taken as the second and fourth
unique ordered value of
x
(first and third if there are 3 values). The
star points, c and d are the first and fifth unique ordered values
of
x
(first and third if there are 3 values). Then
scale
= (b-a)/2, center = (a+b)/2, and
alpha
= (d - "center")/("center" - a).