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)