20021201
3D Graph Example
This example shows how to graph the hyperbolic paraboloid
z
=
x
2
/2 –
y
2
/8.
u
ClassPad Operation
(1) In the 3D Graph application, make the 3D Graph Editor window active.
(2) Tap
7
to display the View Window dialog box, and then configure the parameters
shown below.
xmin = –3
xmax = 3
xgrid = 25
ymin = –3
ymax = 3
ygrid = 25
angle
θ
= 45
angle
φ
= 70
• Except for angle
θ
, all of the above settings are initial defaults.
• After everything is the way you want, tap [OK] to close the View Window dialog box.
(3) Tap line
z
2 on the 3D Graph Editor window, and then input
x
2
/2 –
y
2
/8.
x{2/2-y{2/8
(4) Press
E
.
• This stores the expression you input and selects it, which is indicated by the button
changing to “ ”.
(5) Tap
%
to graph the expression.
5-3-3
Drawing a 3D Graph
• Here, you can use the cursor key to rotate the graph on the display. For more
information, see “5-4 Manipulating a Graph on the 3D Graph Window”.
