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2007 Oct 10
2
how to generate and evaluate a design using Algdesign
...columns. if I change approximate to T, this error has gone.
if I remove nTrials argument in function call:
> optDgn<-optFederov(~.+v3:v4+v5:v6,dat,nRepeat=5,criterion =
> "D",approximate = F)
I got a error : "Singular design."
what would be the cause and what is the sullotion?
another question is, how do I measure or evaluate a design to see if it is
able to handle which effects(main effects/which intercations)? I got some
other designs generated by other packages, so I 'd like to check their
characteristics.
Thanks in advance,
Sun