R语言绘制箱图和直方图

qplot(mtcars$mpg)

library(ggplot2)

qplot(mpg, data=mtcars, binwidth=4)

# This is equivalent to:

ggplot(mtcars, aes(x=mpg)) + geom_histogram(binwidth=4)

plot(ToothGrowth$supp, ToothGrowth$len)

# Formula syntax

boxplot(len ~ supp, data = ToothGrowth)

# Put interaction of two variables on x-axis

boxplot(len ~ supp + dose, data = ToothGrowth)

R Graphics Cookbook----O'REILLY---[美]Winston Chang 

开发环境:RStudio 4.2.0