[Mark Hoffmann]

Another point is that var1 may have 23, 318 observations while var2 has 22, 199 etc - would this influence the code ; _N = _N as we want a combined set of observations not just double?

[Rauthere Kheir]

Hello! I have mode of delivery var with 2 options (SVD and CS), and induction var with 2 options(Yes and No). Each variable has different number of observations. I need to combine SVD, CS and Yes to be one var with 3 options. How do I do that? Thank you

[Nick Cox]

#17 is a repeated post. If interested, please follow https://www.statalist.org/forums/for...bine-variables