can we generate 0,1 and missing values simutaneously?

[Fred Lee]

gen A = B==0 & C==1
replace A = . if B== .| C==.

In other words, can we simplify the two syntax above to one syntax?
Thanks in advance.

[daniel klein]

Sure. Here is one, not necessarily the best, way

generate byte A = B==0 & C==1 if B!=. & C!=.

[Fred Lee]

Sure. Here is one, not necessarily the best, way

generate byte A = B==0 & C==1 if B!=. & C!=.

Great, thanks!

[Nick Cox]

generate byte A = B==0 & C==1 if !missing(B, C)

is another approach but (NB!) not the same thing in the presence of extended missing values .a to .z FWIW, this nuance is also covered by FAQs https://www.stata.com/support/faqs/d...mmy-variables/ https://www.stata.com/support/faqs/d...rue-and-false/ and within a tutorial on indicator variables https://www.stata-journal.com/articl...article=dm0099