Hi @vick25 and @rrmaximiliano, thank you for flagging this. You can just use letters instead of numbers for the choice names (the formula as I wrote it only works on single letter-length choice names):
survey
| type | name | label | calculation | choice_filter |
|---|---|---|---|---|
| calculate | c1 | concat(${visit}) | ||
| begin_repeat | visits | Visits | ||
| calculate | c2 | substr(${c1}, 0, position(…) - 1) | ||
| select_one visits | visit | Visit | not(contains(${c2}, name)) | |
| end_repeat |
choices
| list_name | name | label |
|---|---|---|
| visits | a | Visit 3A |
| visits | b | Visit 3B |
| visits | c | Visit 3C |
| visits | d | Visit 3D |
| visits | e | Visit 3E |
| visits | f | Visit 3F |
| visits | g | Visit 3G |
| visits | h | Visit 3H |
| visits | i | Visit 3I |
| visits | j | Visit 3J |
| visits | k | Visit 3K |
| visits | l | Visit 3L |
| visits | m | Visit 3M |
