#to label individual boxplots in a side-by-side graph 
#use the option "names". 
#For example, if j1,j2,j3 are the three data sets you  need to plot, 
#and their names are ``children'',``teenagers'',and ``adults'', 
#then the command should read something like this:
boxplot(j1,j2,j3,names=c("Children","Teens","Adults"))