I've searched through the contributed packages and found conf.design which supports factorial design generation - is there any way to specify the values of the levels in the functions in this library? Currently the default for 2 level designs are the levels 0 and 1. Reason I ask is I'd like to create a Central Composite design and to do this by appending to a factorial design, it would be easiest if the levels of the factorial were at -1 and 1... (so I can add levels such as 0, -2 and 2)
This brings me to my second question - is there any support for design creation of some of the common designs like the CCD?
And finally - in the help for conf.design, in the "See Also" section, there's a fac.design mentioned but I can't seem to find it anywhere.. is this function available and what does it do?
I would appreciate it if you could please cc me on the reply.
Thanks, nirmal
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