A.21 graphics Package
다음의 함수들이 흔히 사용된다.
par # graphic option setting
plot # basic plot function
barplot # bar chart
hist # histogram
stripchart # strip chart
points # plot points additionally
lines # plot lines additionally
abline # straight line
legend # add legend
pairs # pairs plotting
matplot # matrix plot, multiple lines (y's) for one x
matlines # plot matrix lines additionally
title # title of the figure on a device
axis # axis plot
arrows # arrows plot
ggplot2 package를 사용하면 더 미려한 graph를 얻을 수 있다.