modof[Qx,n]
Arithmetic
Returns the modulus (remainder) of dividing the response of Qx by n. Useful for sampling patterns (every nth respondent) or rotation logic.
Parameters
| Parameter | Type | Description |
|---|---|---|
Qx |
Question ref | A numeric or single-response question |
n |
Integer | The divisor |
Returns: Integer — remainder of Qx divided by n
Examples
expressions
modof[Q4,2]=0 -- age is an even number modof[Q4,5]=0 -- age divisible by 5 modof[SYSID,3]=1 -- route every 3rd respondent
Combine with system variables like respondent ID for quota-based sampling rotation.