列表数据“lt”如下。
[[1]]
"f24j" "mirror" "heliostat" "reflect" "photo" "solar" "sun"
[[2]]
"imag" "radiation" "sens" "detect"
[[3]]
"mesur" "chas" "captur"
...
我想从“lt”制作结果数据..
var1 var2
1 f24j mirror
2 f24j heliostat
3 f24j reflect
4 f24j photo
5 f24j solar
6 f24j sun
7 mirror heliostat
8 mirror reflect
9 mirror photo
10 mirror solar
11 mirror sun
12 heliostat reflect
13 heliostat photo
14 heliostat solar
15 heliostat sun
16 reflect photo
17 reflect solar
18 reflect sun
19 photo solar
20 photo sun
21 solar sun
22 img radiation
23 img sens
24 img detect
25 radiation sens
26 radiation detect
27 sens detect
28 mesur chas
29 mesur captur
30 chas captur
...
我不知道如何在 R 中得到这个结果