creating a variable that=1 if another variable equals any of many things

[Collin James]

Hi,

I am trying to create a variable in the following way:
gen x=(y==1|y==2|y==3)

However, there are many different things that y can equal where x should =1. Is there a more efficient way to do this? Something like gen x=1 if y in the list (1,2,3,4,5,6,7,....) etc? Thanks.

gen nonhosp_detox_rehab=(service_code=="H2034" | service_code=="H0013" | service_code=="H0012" | service_code=="H0012-TG" | service_code=="H2036")

[Maarten Buis]

gen nonhosp_detox_rehab= inlist(service_code,"H2034" , "H0013", "H0012","H0012-TG" ,"H2036")

[Girish Venkataraman]

This might get you started:

gen nonhosp_detox_rehab= 1 if inlist(service_code, "H2034","H0013","H0012")

[Nick Cox]

See also https://journals.sagepub.com/doi/pdf...36867X19830921 for an overview of indicator variable creation, including the standard advice that (1, 0) indicators are usually much more useful than (1, .) indicators.

[Collin James]

Thank you all!