绘制条图

Use the barplot function. The first argument is a vector of bar heights: 公卫考场

> barplot(c(height1, height2, height3))

so it’s common to add some simple adornments: a title, labels for the bars,
and a label for the y-axis:

公卫人

> barplot(heights,
+ main="Mean Temp. by Month",
+ names.arg=c("May", "Jun", "Jul", "Aug", "Sep"),

公卫百科

+ ylab="Temp (deg. F)")

The barchart function in the lattice package is another way to produce a bar chart.

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