r - R中非数值数据的条形图

Question

我将如何使用 R 绘制非数值数据频率的条形图？

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

我想得到一个条形图，其中每个条形代表向量中的一个唯一值，每个条形的高度与该值的频率相对应：

Answer 1

Calculate the table of values for the barplot using the table() function, e.g.:

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

This produces