Hi, I'd like to follow up an older discussion on adding significance stars to boxplots. ( http://r.789695.n4.nabble.com/indicating-significant-differences-in-boxplots-td862335.html ) As suggested by Jim Lemon, there is following solution for a single boxplot:
boxplot(count ~ spray, data = InsectSprays, col = "lightgray") #and we'll assume that the second and third boxplots require a star: par(xpd=TRUE) yrange<-par("usr")[3:4] ypos<-yrange[2]+diff(yrange)/40 segments(2,ypos,3,ypos) text(2.5,ypos+diff(yrange)/40,"*",cex=2) par(xpd=FALSE) But what if one wants to plot two boxplots (e.g. with each only two groups which are significantly different) and add such stars to each of the boxplots. I usually use par(mfrow(1,2)) to plot all boxplots in a row. How can I also add segments and stars on top of each plot? /johannes [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.