Texas Instruments TITANIUM TI-89 User Manual page 357

If a sequence requires an initial value but you do not enter one, you will get an error
when graphing.
On the Y= Editor, Axes lets you select the axes that are used to graph the sequences.
Optionally, for sequences only, you can select different axes for the graph. TIME is the
default.
Axes Description
TIME Plots n on the x axis and u(n) on the y axis.
WEB
Plots u(n
CUSTOM Lets you select the x and y axes.
The Y= Editor maintains an independent function list for each Graph mode setting. For
example, suppose:
• In FUNCTION graphing mode, you define a set of
SEQUENCE graphing mode and define a set of
• When you return to FUNCTION graphing mode, your
in the Y= Editor. When you return to SEQUENCE graphing mode, your
sequences are still defined.
You can use the
Note:
Reference) to define functions and equations for any graphing mode, regardless of the
current mode.
Sequence Graphing
- 1) on the x axis and u(n) on the y axis.
command from the Home screen (see Technical
Define
functions. You change to
y(x)
sequences.
u(n)
functions are still defined
y(x)
u(n)
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