Hello Peter,
I'm not sure what you want to do but the syntax for an IF statement is:
IF(Logical Test, Result if true, Result if false), for example: IF([column1]=1, "Yes", "No").
Calculate is useful for conditional aggregating, for example:
CALCULATE(SUM([column1]), [column2]>0)
*Structure: CALCULATE(Expression, Filter1, Filter2...)
Olivier.