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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