R语言中aggregate函数

1、测试数据1



name <- LETTERS[1:8]
gender <- c("M","F","F","M","F","M","M","F")
age <- c(30,20,40,40,30,20,30,20)
height <- c(100,200,300,200,400,500,100,600) 
a <- data.frame(name,gender,age,height)
a


R语言中aggregate函数整合数据_r语言

 

 

2、测试2



a
b <- aggregate(a[,3:4], by=list(gender=gender), FUN=mean)
b


R语言中aggregate函数整合数据_测试数据_02

 

 

3、测试3



c <- aggregate(a[,3:4], by=list(gender=gender), FUN=sum)
c


R语言中aggregate函数整合数据_r语言_03

 

 

4、测试4



a
d <- aggregate(a[,4], by=list(age=age),FUN=mean)
d


R语言中aggregate函数整合数据_测试数据_04

 

 

5、测试5



a
e <- aggregate(a[,4],by=list(gender=gender,age=age), FUN=mean)
e
f <- aggregate(a[,4],by=list(gender=gender,age=age), FUN=sum)
f


R语言中aggregate函数整合数据_测试数据_05