summary(olympic)
## maybe str(olympic) ; plot(olympic) ...
with(head(olympic, n=8),
     barplot(rbind(gold,silver,bronze),
             col=c("gold","grey","brown"),  # No "silver" or "bronze"!
             names.arg=country, cex.names=0.5,
             beside=TRUE, main="2008 Summer Olympic Final Medal Count",
             ylab="Medal count", las=1,
             sub="Top 8 countries; 'gold'=gold, 'grey'=silver, 'brown'=bronze"))Run the code above in your browser using DataLab