user manual

6-4 Sequence Graphing
8306SEQN.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:22 PM Printed: 02/19/01 1:36
PM Page 4 of 16
After selecting Seq mode, press
o
to display the sequence
Y=
editor.
In this editor, you can display and enter sequences for u( n ),
v( n ), and w( n ). Also, you can edit the value for n Min, which
is the sequence window variable that defines the minimum
n value to evaluate.
The sequence
Y=
editor displays the n Min value because of
its relevance to
u( n Min), v( n Min), and w( n Min), which are the
initial values for the sequence equations
u( n ), v( n ), and
w( n ), respectively.
n Min in the
Y=
editor is the same as n Min in the window
editor. If you enter a new value for
n Min in one editor, the
new value for
n Min is updated in both editors.
Note:
Use
u( n Min)
,
v( n Min)
, or
w( n Min)
only with a recursive
sequence, which requires an initial value.
The icons to the left of u( n ), v( n ), and w( n ) represent the
graph style of each sequence (Chapter 3). The default in
Seq mode is
í
(dot), which shows discrete values. Dot,
ç
(line), and
è
(thick) styles are available for sequence
graphing. Graph styles are ignored in
Web format.
The TI
-
83 graphs only the selected sequence functions. In
the
Y=
editor, a sequence function is selected when the =
signs of both u( n )= and u( n Min)= are highlighted.
To change the selection status of a sequence function,
move the cursor onto the
= sign of the function name, and
then press
Í
. The status is changed for both the
sequence function
u( n ) and its initial value u( n Min).
Displaying the
Sequence Y=
Editor
Selecting Graph
Styles
Selecting and
Deselecting
Sequence
Functions