Lauraceae
[未知用户]
请问能给举个例子吗
我做的list也没看出差别
x<-list(1:3,5:13,matrix(1:9,ncol=3))
> x
[[1]]
[1] 1 2 3
[[2]]
[1] 5 6 7 8 9 10 11 12 13
[[3]]
[,1] [,2] [,3]
[1,] 1 4 7
[2,] 2 5 8
[3,] 3 6 9
> x[3]
[[1]]
[,1] [,2] [,3]
[1,] 1 4 7
[2,] 2 5 8
[3,] 3 6 9
> x[[3]]
[,1] [,2] [,3]
[1,] 1 4 7
[2,] 2 5 8
[3,] 3 6 9
:-)