R中非数值数据的条形图

Question

如何使用R对非数值数据的频率进行条形图？

例如,如果给予 v = c("B","A","B","A","B","D","C","D","D","D","C")

我想得到一个条形图,其中每个条形代表矢量的唯一值,每个条形的高度与该值的频率相对应:

Answer 1

使用table()函数计算条形图的值表,例如:

v <- c("B","A","B","A","B","D","C","D","D","D","C")
barplot(table(v))

这产生了