subtractof[Qa,Qb]
Arithmetic
Returns the result of subtracting the response of Qb from the response of Qa (Qa minus Qb). Use for difference calculations between two numeric questions.
Parameters
| Parameter | Type | Description |
|---|---|---|
Qa |
Question ref | Minuend — value to subtract from |
Qb |
Question ref | Subtrahend — value to subtract |
Returns: Number — Qa minus Qb
Examples
expressions
subtractof[Q4,Q5]>=0 -- Q4 value is at least as large as Q5 subtractof[Q10,Q11]>=5 -- Q10 is at least 5 more than Q11
Both Qa and Qb must be numeric questions or produce numeric values.