Two tips: adding title for graph with multiple plots; add significance asterix onto a boxplot
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1. How to add title for graph with multiple plots?
plot(1:10, main=”Plot 1″)
plot(1:100, main=”Plot 2″)
mtext(“Title for Two Plots”, outer = TRUE, cex = 1.5)
2. How to add text (e.g. asterix for significance) onto a boxplot?
boxplot(len ~ dose, data = ToothGrowth, outline=F)
text(x=2,y=max(boxplot.stats(ToothGrowth$len[ToothGrowth$dose==1])$stat), paste(“n”,sum(ToothGrowth$dose==1),sep=”=”), pos=3, offset=.2, cex=.8)
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