20060301
Inputting a Formula
A formula is an expression that the Spreadsheet application calculates and evaluates when 
you input it, when data related to the formula is changed, etc. 
A formula always starts with an equal sign (=), and can contain any one of the following.
• Values
•  Mathematical expressions
•  Cell references
•  ClassPad soft keyboard functions (cat page of keyboard)
•  [Action] menu functions (page 13-6-4)
Formulas are calculated dynamically whenever related values are changed, and the latest 
result is always displayed in the spreadsheet. 
The following shows a simple example where a formula in cell B5 calculates the average of 
the values in cells B1 through B3.
13-4-4
Editing Cell Contents
Important!
• Tapping another cell while the first character in the edit box is an equal sign (=) inserts a 
reference to the tapped cell into the edit box. Dragging across a range of cells will input a 
reference to the selected range. See “Inputting a Cell Reference” on page 13-4-6 for more 
information. 
• When a cell is set to text data type, formulas are displayed as text when they are not 
preceded by an equal sign (=). 
• When a cell is set to calculation data type, an error occurs when a formula is not preceded 
by an equal sign (=). 
u
 To use the soft keyboards to input a function
Example:  To input the following
  Cell A1: 
x
^row(A1)
  Cell B1: diff(A1,
 x
, 1)
  (1) Tap cell A1 to select it.
  (2) Press 
=
, 
x
, and then 
{
.