Displaying 2 results from an estimated 2 matches for "optdgn".
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2007 Oct 10
2
how to generate and evaluate a design using Algdesign
...and two interactions within 2 pair of
variables v3-v4 and v5-v6, the following is the code
################
require(AlgDesign)
set.seed(1)
levels = c(v1=3,v2=3, v3=4,v4=4,v5=4,v6=4)
dat<-gen.factorial(levels,center=FALSE,varNames=names(levels),factors=
c(1,2,3,4,5,6))
model = ~.+v3:v4+v5:v6
optDgn<-optFederov(model,dat,nRepeat=5,nTrials = 32,criterion = "D",
approximate = F)
----------------------------
this lead to a error msg " nTrials must be greater than or equal to the
number of columns in expanded X" . I thought I do not have that many
columns. if I change appro...
2007 Oct 09
2
AlgDesign--exact and approximate design
Hi
I am trying to generate a design using Algdesign and came across terms of
"exact design" and "approxiamte theory design", I did not find a reference
to explain what they are, could some one shed some light about this on me?
Another question is, I want to measure the main effects and at least two
interactions, variables are factors, how do I ensure this in formula,