Texas Instruments TI-89 Titanium User Manual

Additional Graphing Topics 461
two-piece functions. For three or more pieces, it may be easier to create a multi-
statement, user-defined function.
Using the When Function
To define a two-piece function, use the syntax:
when(condition, trueExpression, falseExpression)
For example, suppose you want to graph a function with two pieces.
For three or more pieces, you can use nested
when functions.
When: Use expression:
x < 0
Mx
x | 0
5 cos(x)
In the Y= Editor:
The function is “pretty
printed” in this form.
Enter the function in this
form.

Texas Instruments TI-89 Titanium Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
CPU	Motorola 68000
CPU Speed	16 MHz
RAM	256 KB
Flash ROM	2.7 MB
Programming Language	TI-BASIC, Assembly
Power Source	4 AAA batteries
Connectivity	I/O port
Dimensions	7.5 x 3.5 x 1 inches