Here is one way to do this.
v1 range 1 3 after entry if v1 <> . then if (v1 = v2) or (v1 = v3) or (v1 = v4) or (v1 = v5) or (v1 = v6) or (v1 = v7) or (v1 = v8) then help "You cannot have two choices the same." v1 = . goto v1 endif endif end end
v2 range 1 3 after entry if v2 <> . then if (v2 = v1) or (v2 = v3) or (v2 = v4) or (v2 = v5) or (v2 = v6) or (v2 = v7) or (v2 = v8) then help "You cannot have two choices the same." v2 = . goto v2 endif endif end end ---- add v3-v8 here in the same fashion ---
Jamie
On 2013-08-04, at 12:39 PM, epidata-list@lists.umanitoba.ca wrote:
I have a small constraint in my chk file and I wonder how I could program it. I have 8 options (8 variables V1 - V8). Interviewers are asked to chose their top 3 options. So that the legal values are 1, 2, 3 and there must not be the same value twice. I dont know how to write short instructions to check that. Thanks for your advices.
Serge.