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...letters that made it easy to show which groups differed from one another within an ANOVA model that included a significant interaction. Is there a way to summarize my result in R that makes it easier to indicate significant post hoc comparisons graphically? Thanks for your help, Doug Reid CNFER Lakehead University [[alternative HTML version deleted]]

Hi everyone, I am hoping someone can help with my attempted use of the expression function. I have a long series of text and variable to paste together including a degree symbol. The text is to be placed on my scatter plot using the mtext function. Using expression like this: changetext = expression(paste("Change from ",mini," to ", maxi, ":", diff