在 r 中制作字符列表

Question

我是 R 新手，这是一个非常简单的问题，我似乎无法解决...所以我想制作一个包含 A1~A12、B1~B12、C1~C12、D1~D12、E1 的列表～E12、F1～F12、G1～G12、H1～H12。像下面这样的东西...

 [1] "A1"  "A2"  "A3"  "A4"  "A5"  "A6"  "A7"  "A8"  "A9"  "A10" "A11" "A12" "B1"  "B2"  "B3"  "B4"  "B5"  "B6"  "B7"  "B8" 
 [21] "B9"  "B10" "B11" "B12" "C1"  "C2"  "C3"  "C4"  "C5"  "C6"  "C7"  "C8"  "C9"  "C10" "C11" "C12" "D1"  "D2"  "D3"  "D4" 
[41] "D5"  "D6"  "D7"  "D8"  "D9"  "D10" "D11" "D12" "E1"  "E2"  "E3"  "E4"  "E5"  "E6"  "E7"  "E8"  "E9"  "E10" "E11" "E12"
[61] "F1"  "F2"  "F3"  "F4"  "F5"  "F6"  "F7"  "F8"  "F9"  "F10" "F11" "F12" "G1"  "G2"  "G3"  "G4"  "G5"  "G6"  "G7"  "G8" 
[81] "G9"  "G10" "G11" "G12" "H1"  "H2"  "H3"  "H4"  "H5"  "H6"  "H7"  "H8"  "H9"  "H10" "H11" "H12" 

我尝试使用rep...或创建一个字母[1:8]的向量和一个单独的c(1:12)向量，并尝试将它们组合在一起...但我并没有很成功。

提前致谢！

附加问题有些相关......

所以在我做了这个之后，我想将其与另一个列表进行比较。另一个列表可能看起来像这样：

[1] "A1"  "A2"  "A3"  "A5"  "A6"  "A7"  "A8"  "A9"  "A10" "A11" "A12" "B1"  "B2"  "B3"  "B4"  "B5"  "B6"  "B7"  "B8"  "B9" 
[21] "B10" "B11" "B12" "C1"  "C2"  "C3"  "C4"  "C5"  "C6"  "C7"  "C8"  "C9"  "C10" "C11" "C12" "D1"  "D2"  "D3"  "D4"  "D5" 
[41] "D6"  "D7"  "D8"  "D9"  "D10" "D11" "D12" "E1"  "E2"  "E3"  "E4"  "E5"  "E6"  "E7"  "E8"  "E9"  "E10" "E11" "E12" "F1" 
[61] "F2"  "F3"  "F4"  "F5"  "F6"  "F7"  "F8"  "F9"  "F10" "F11" "F12" "G1"  "G2"  "G3"  "G4"  "G5"  "G6"  "G7"  "G8"  "G9" 
[81] "G10" "G11" "G12" "H1"  "H2"  "H3"  "H4"  "H5"  "H6"  "H7"  "H8"  "H9"  "H10" "H11" "H12"

不是很清楚，但是这个列表缺少“A4”。通过将此元素与我创建的包含所有 96 个元素的元素进行比较，我想知道缺少哪个元素。我尝试使用 intersect 和 setdiffer 等函数。但它们不会逐个元素地比较列表。

Answer 1

这是一个替代方案。关键是each参数并将rep其用于其中一个元素，而不是另一个元素：

paste0(rep(LETTERS[1:8], each=12), rep(1:12, 8))

 [1] "A1"  "A2"  "A3"  "A4"  "A5"  "A6"  "A7"  "A8"  "A9"  "A10" "A11" "A12" "B1"  "B2" 
[15] "B3"  "B4"  "B5"  "B6"  "B7"  "B8"  "B9"  "B10" "B11" "B12" "C1"  "C2"  "C3"  "C4" 
[29] "C5"  "C6"  "C7"  "C8"  "C9"  "C10" "C11" "C12" "D1"  "D2"  "D3"  "D4"  "D5"  "D6" 
[43] "D7"  "D8"  "D9"  "D10" "D11" "D12" "E1"  "E2"  "E3"  "E4"  "E5"  "E6"  "E7"  "E8" 
[57] "E9"  "E10" "E11" "E12" "F1"  "F2"  "F3"  "F4"  "F5"  "F6"  "F7"  "F8"  "F9"  "F10"
[71] "F11" "F12" "G1"  "G2"  "G3"  "G4"  "G5"  "G6"  "G7"  "G8"  "G9"  "G10" "G11" "G12"
[85] "H1"  "H2"  "H3"  "H4"  "H5"  "H6"  "H7"  "H8"  "H9"  "H10" "H11" "H12"