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...on") ; a # Gives unlabeled differences wt <- warpbreaks$tension:warpbreaks$wool # Creates interaction term with the correct order of comparisons b <-TukeyHSD(aov(breaks~wt,warpbreaks))) # Correctly labels differences , but provides differences that, I think, are slightly inaccurate. rowames(a) <- rownames(b) # Provides rownames for the correct differences par(mar=c(5,10,4,2)+0.1) plot(a, las=1) # Puts correct labels on differences. Thanks for any comments, Hank Stevens Dr. Martin Henry H. Stevens, Assistant Professor 338 Pearson Hall Botany Department Miami University Oxfor...