---

7.7 Functions

PSPP functions provide mathematical abilities above and beyond those possible using simple operators. Functions have a common syntax: each is composed of a function name followed by a left parenthesis, one or more arguments, and a right parenthesis.

Function names are not reserved. Their names are specially treated only when followed by a left parenthesis, so that ‘EXP(10)’ refers to the constant value e raised to the 10th power, but ‘EXP’ by itself refers to the value of a variable called EXP.

The sections below describe each function in detail.

• Mathematical Functions
• Miscellaneous Mathematical Functions
• Trigonometric Functions
• Missing-Value Functions
• Set-Membership Functions
• Statistical Functions
• String Functions
• Time & Date Functions
• Miscellaneous Functions
• Statistical Distribution Functions