R tutorial 04 - Table & Bar Plot 表格与棒形图

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")