label value?

[River Huang]

Dear All, Is there any other way (say, one line command) to obtain `a' as below.

* Example generated by -dataex-. For more info, type help dataex
clear
input str4 y
"Y"
"N"
end

label define a 1 "Y" 0 "N"
encode y, gen(a)

Thanks.

[Joseph Coveney]

Maybe

generate byte a = y == "Y" if !missing(y)

or

generate byte a = cond(y == "Y", 1, cond(y == "N", 0, .)

(They are not equivalent, and I wouldn't use either, but rather the following.)

label define NY 0 N 1 Y
encode y, generate(a) label(NY) noextend

[Clyde Schechter]

There is also -encoder-, by Dan Klein, available from SSC.

encoder y, gen(a) setzero

The -setzero- option causes Stata to create a label with zero as the base value.

[River Huang]

Dear @Joseph Coveney, and @Clyde Schechter, Thanks for these useful suggestions.

[daniel klein]

encoder is actually by David Tannenbaum.

[Clyde Schechter]

Yes, sorry for the misattribution. Daniel is right; -encoder- is by David Tannenbaum. I was confusing it with -elabel-, which really is by Daniel Klein.