Re: [R] Pairwise T-Tests and Dunnett's Test (possibly using multcomp)

Hi Josh,   Thanks for your reply. You're right about letting R's method dispatch system choose the method for summary and inserting more spaces in the code. I was just messing around with the code in the former case and forgot to change it back. As far as not having enough whitespace goes, I've

Re: [R] Pairwise T-Tests and Dunnett's Test (possibly using multcomp)

Hi Paul, Changing the factor levels will work (as you saw). In this case, you could also edit the contrast matrix. ## look at default contrasts contrasts(gad$dosegrp) model1 <- lm(hama ~ dosegrp, data = gad) summary(model1) ## choose group 3 as base (comparison) contrasts(gad$dosegrp) <- contr.