Sharp el-9900c Mode D’Emploi
90
Chapter 6: Advanced Graphing Features — Advanced Keyboard
phase-based (uv, uw, or vw)
The u
n
values will be plotted against the v
n
values (uv).
(n
–
1)-based (Web)
The u
n
values will be plotted against the u
n-1
value.
Note:
• When u
n–2
is incorporated in to the equation, the
u(nMin)
requires two values: the minimum, and the second smallest. For
example, you will need {0, 1} in the
u(nMin) entry row if u(n
–
1)
+
u(n
–
2) is entered as the equation.
• When Web is selected, n – 2 cannot be referred to. n
also
cannot be directly referred to; entering u(n–1) + n will result in
an error.
Before entering graphing sequences, the calculator’s graphing
coordinates will need to be set up:
1. Press
@ ;. The SETUP menu appears.
2. Press
E to select E COORD, then press 4 to select 4
Seq.
3. Press
C to exit the SETUP menu.
Example 1:
n-based Graphing (Time)
• Draw a sequential graph of u
n
= 2
×
2
n–1
.
First, make sure that the graph coordinate mode is set to
sequential (see above.)
1. Press
@ f to open the FORMAT menu. The FORMAT
menu allows user to change the graph configurations.
2. When the menu appears, select the item G TYPE.
3. Press
2 to select 2
Time.