On Sun, 16 Nov 2003, Nirmal Govind wrote: > 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)
It is very easy to change the levels of a factor by levels<-(): see its help page. > This brings me to my second question - is there any support for design > creation of some of the common designs like the CCD? charge-coupled device? Probably central composite design -- not that I know of. > 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? conf.design was ported from S, which does have fac.design. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
