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1. Table
Table是自动把数据组成一个表格。
{ A, A, A, B, B, C}
数组共有3个A、2个B、1个C
source <- c("A", "A", "B", "A", "C", "B")
results <- table(source)
print(results)
Output result:
A B C
3 2 1
2. Bar Plot
source <- c("A", "A", "B", "A", "C", "B")
results <- table(source)
barplot(results, main="char",
xlab="Number of char")
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