create all possible permutations of two vectors in R [duplicate]

Answer 1

It sounds like you are looking for expand.grid.

> expand.grid(f1, e1)
   Var1 Var2
1     a    e
2     b    e
3     c    e
4     d    e
5     a    f
6     b    f
7     c    f
8     d    f
9     a    g
10    b    g
11    c    g
12    d    g

I don't know what "speed codes" are, so I'm not sure I can help from that aspect.