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NullMinus
Returns the difference of the given PetroVisor signals or numbers, even if the minuend or subtrahend is Null. All Null values will be treated as zeros.
Syntax
NullMinus(expression left, expression right)
- expression left: signal expression
- expression right
Examples
“oil production rate” in “m3/h” !- 5
NullMinus(“oil production rate” in “m3/h”, 5)