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302 Formula Editor Chapter 9
Using Functions
To build a formula that contains a comparison function
1 Open the formula editor by right-clicking a column name in the data grid and selecting Formula.
2 Select an expression in the formula editing area by clicking it. (It is selected when there is a red
outline around it.)
3 Click the menu on the function browser and select Comparison, as shown in Figure 9.13. The
comparison functions now appear in the list below the menu.
Figure 9.13 Select Comparison from the Functions (grouped) List
4 Select which function to insert in the formula. For descriptions of each function, see “Comparison
Functions,” p. 467.
5 Enter values in the boxes that represent a and b.
Using Conditional Clauses
You can include conditional expressions (called conditionals for short) in your formulas. These
expressions let you build a sequence of clauses paired with result expressions. Constructing a sequence
of clauses is the way you conditionally assign values to cells in a calculated column. Conditionals follow
these rules:
• When no clause is true, the formula editor evaluates the result expression that accompanies the else
clause.
• All result expressions in a conditional expression must evaluate to the same data type.
• A missing term matches any data type.
• By definition, expressions that evaluate as zero are false.
• If an expression evaluates as missing, no clauses are executed and missing is returned. All other
numeric expressions are true.
To build a formula that contains conditional clauses
1 Open the formula editor by right-clicking a column name in the data grid and selecting Formula.
2 Select an expression in the formula editing area by clicking it. (It is selected when there is a red