已知生成7项的list,如何分别调用每列数据进行计算，environment对list有什么影响~~thank u~~
e1<-new.env()
> e1$f1<-c(43,42,41)
> e1$f2<-c(39,38,37,36)
> e1$f3<-c(35,34,33)
> e1$f4<-c(32,31)
> e1$f5<-c(30,29,28,27,26,25)
> e1$f6<-c(23,22,21,20,19,18,17,16,15,14,13,12,11,10)
> e1$f7<-c(5,4,3,2,1)
> as.list(e1)
$f2
[1] 39 38 37 36

$f3
[1] 35 34 33

$f4
[1] 32 31

$f5
[1] 30 29 28 27 26 25

$f6
[1] 23 22 21 20 19 18 17 16 15 14 13 12 11 10

$f7
[1] 5 4 3 2 1

$f1
[1] 43 42 41