I have a df with one column and I would like to make combinations with the values of this column in order to have a new df with two columns, like he simple example below: (Obs: my df has ~5000 rows)
df
CG
1
2
3
##I would like a result similar to this:
> head(df1)
C1 C2
1 1
1 2
1 3
2 1
2 2
2 3
3 1
3 2
3 3
Does someone could help me? Thank you in advance
