R语言中的ifelse条件表达语句

 

条件表达式：

1、

> a = 5
> ifelse(a %% 2 == 0, print("a is even"), print("a is odd"))   ## 满足a %% 2 ==0， 执行第一个语句，否则执行第二个语句
[1] "a is odd"
[1] "a is odd"
> a = 6
> ifelse(a %% 2 == 0, print("a is even"), print("a is odd"))   
[1] "a is even"
[1] "a is even"

 

2、

a = 10
ifelse(a > 0, a * 10, a * 5)         ##  满足条件，则执行第一个语句， 否则执行第二个语句

a = -10
ifelse(a > 0, a * 10, a * 5)