Thanks to both of you, I used the below code instead, which has been cleaned and pruned a little. It produces a trellis of qq plots with the proper annotations as per Minitab from a dataframe passed to mtab.matrix(). However, I can't get individual variable names (these are column names in the passed dataframe) to annotate the plots. Perhaps "apply" simply doesn't deal with the colname and I have to try a completely different method? Or will apply pass enough information to the included function (mtab.norm) to allow me to annotate the plot? Again, I'm probably missing something banal and wholly obvious.
mtab.norm<-function(x){ library(nortest) library(lattice) x<-as.numeric(x) x<-as.vector(x) plot.ht<-4.6 plot.wd<-4.6 pt.ht=plot.ht/7 txt.sz<-(plot.ht/5) qqnorm(x, pch=16, cex=pt.ht, col="darkorange", xlab=paste(colnames(x)), ylab='', main='') qqline(x, col="black", lty=2) grid(col = "darkgrey", lty=2) st.x<-shapiro.test(x) mtext(paste("Shapiro-Wilks", "\n p =",signif(st.x$p.value,digits=4),"\n W =",signif(st.x$statistic,digits=4)), line=1, cex=txt.sz, adj=0) adt.x<-ad.test(x) mtext(paste("Anderson-Darling", "\n p =",signif(adt.x$p.value,digits=4), "\n W =", signif(adt.x$statistic,digits=4)), line=1, cex=txt.sz, adj=1)} mtab.matrix<-function(z){ pdf(file=paste(colnames(z)[1],".pdf"), paper="a4r", width=0, height=0) par(mfcol=c(3,3), mar=c(5.1,4.1,5.1,2.1)) par(bg="white") apply(z, 2, mtab.norm) dev.off()} Thanks again for all your help. I am obviously a relative beginner, but an enthusiast! Dr. Ross Dunne, HRB Clinical Research Fellow, Dept. of Psychiatry, Trinity College Dublin. -- View this message in context: http://r.789695.n4.nabble.com/adding-statistical-output-to-a-plot-tp2235565p2235629.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.