I want to condionally suppress a field label.  I learned in my last foray that when I drop a DataField on the report, I can conditionally suppress the associated label by adding a formula to the Suppress parameter of the Formatting box. 

In this case, I want that formula to suppress the label if the value of the associated data field is any of several possibilities.  So I think I want a formual in the label like

{DataField} IN (1,2,3)

So suppress if any of 1,2 or 3.  But not sure if there is an "IN" operator or correct syntax.