How to drop the values of a variable that are equal to the multiples of 3 (3, 6, 9, 12, etc)?

[Andres Henriquez]

Hi! How can I drop the values of a variable that are equal to the multiples of 3 (3, 6, 9, 12, etc)?
Thank you!

[Rich Goldstein]

the mod() function is your friend here; since there is no data example, I make up variable names:

drop if mod(var1,3)==0

or, if you want to keep a record

gen byte wanted=mod(var1,3)
drop if wanted==0

[Andres Henriquez]

Thank you Rich! It help me =)

[Nick Cox]

keep if mod(var1, 3)

is for those who like a small challenge.