starDesign: Axial Design
In qualityTools: Statistical Methods for Quality Science

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

starDesign is a function to create the star portion of a response surface design. The starDesign function can be used to create a star portion of a response surface design for a sequential assembly strategy.
One can either specify k and p and alpha and cs and cc OR simply simply pass an object of class facDesign to the data. In the latter an object of class facDesign otherwise a list containing the axial runs and centerpoints is returned.

1	starDesign(k, p = 0, alpha = c("both", "rotatable", "orthogonal"), cs, cc, data)

`k`	integer value giving number of factors.
`p`	integer vaue giving the number of factors via aliasing. By default set to ‘0’.
`alpha`	if no numeric value is given defaults to “both” i.e. “orthogonality” and “rotatibility” which can be set as character strings too.
`cs`	integer value giving the number of centerpoints in the star portion of the design.
`cc`	integer value giving the number of centerpoints in the cube portion of the design.
`data`	optional - an object of class `facDesign`.

starDesign returns a facDesign object if an object of class facDesign is given or a list containing entries for axial runs and center points in the cube and the star portion of a design.

Thomas Roth thomas.roth@tu-berlin.de

MYERS, R.H.; MONTGOMERY, D.C.; ANDERSON-COOK, C.M.: Response Surface Methodology. New Jersey: Wiley,2009.

facDesign for 2^k factorial designs
fracDesign for 2^k-p fractional factorial designs
rsmDesign for response surface designs
mixDesign for mixture designs
http://www.r-qualitytools.org

#Example 1 - sequential assembly
#factorial design with one center point in the cube portion
fdo = facDesign(k = 3, centerCube = 1)  
fdo

#set the response via generic response method
response(fdo) = 1:9 
 
#sequential assembly of a response surface design (rsd)
rsd = starDesign(data = fdo)  
rsd

#Example 2 - returning a list
starDesign(k = 3, cc = 2, cs = 2, alpha = "orthogonal")
starDesign(k = 3, cc = 2, cs = 2, alpha = "rotatable")
starDesign(k = 3, cc = 2, cs = 2, alpha = "both")