Mar 25, 2011; 12:58am Simon Bate wrote:
>> I've been happily using the TukeyHSD function to produce Tukeys HSD tests
>> but have decided to try
>> out Multcomp instead. However when I carry out the test repeatedly I have
>> found that Multcomp
>> produces slightly different values each time. (see code below).
The random number generator comes into this so you need to ?set.seed to get
an identical result. Insert a set.seed statement in your code:
##
for (i in 1:20)
{
set.seed(3) ## add this
mult<-glht(lm(Resp1~Treat1, data=statdata, na.action = na.omit),
linfct=mcp(Treat1="Tukey"))
multp<-summary(mult)
tabs=format(round(multp$test$pvalues, 6), nsmall=6, scientific=FALSE)
print (tabs)
i=i+1
}
Regards, Mark.
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