r - 从两个向量创建元组

Question

如果我有两个长度相同的向量 A<-c(5,10)和 B<-c(7,13)如何轻松地将这两个向量转换为单个元组向量 i。 e. c((5,7),(7,13)) ?

Answer 1

其他人提到了 list 。我看到了其他可能性:

cbind(A, B)  # makes a column-major  2x2-"vector"
rbind(A, B)  # an row major 2x2-"vector" which could also be added to an array with `abind`

也可以保留它们的“起源”

AB <- cbind(A=A, B=B)
array(c(AB,AB+10), c(2,2,2) )
, , 1
     [,1] [,2]
[1,]    5    7
[2,]   10   13
, , 2
     [,1] [,2]
[1,]   15   17
[2,]   20   23

> abind( array(c(AB,AB+10), c(2,2,2) ), AB+20)
, , 1
      A  B
[1,]  5  7
[2,] 10 13

, , 2
      A  B
[1,] 15 17
[2,] 20 23

, , 3
      A  B
[1,] 25 27
[2,] 30 33