Texas Instruments PLUS TI-89 - Manual (Page 182)

Chapter 10: 3D Graphing 165
10_3D.DOC TI-89/TI-92 Plus: 3D Graphing (English) Susan Gullord Revised: 02/23/01 11:00 AM Printed: 02/23/01 4:22 PM Page 165 of 22
From the Y= Editor, Window Editor, or Graph screen, press:
ƒ 9
— or —
TI
-
89: ¥ Í
TI
-
92 Plus : ¥ F
¦ The dialog box shows the
current graph format
settings.
¦ To exit without making a
change, press N.
To change any of these settings, use the same procedure that you use
to change other types of dialog boxes, such as the
MODE dialog box.
To display the valid Axes settings,
highlight the current setting and
press B.
z1(x,y) = x ñ +.5y ñ
¦ AXES — Shows standard
xyz axes.
¦ BOX — Shows 3-dimensional
box axes.
The edges of the box are
determined by the Window
variables
xmin , xmax , etc.
In many cases, the origin ( 0,0,0 ) is inside the box, not at a corner.
For example, if xmin = ymin = zmin = ë 10 and xmax = ymax = zmax = 10 ,
the origin is at the center of the box.
Changing the Axes and Style Formats
With its default settings, the TI - 89 / TI - 92 Plus displays hidden
surfaces on a 3D graph but does not display the axes.
However, you can change the graph format at any time.
Displaying the
GRAPH FORMATS
Dialog Box
Examples of Axes
Settings
Tip: Setting Labels = ON is
helpful when you display
either type of 3D axes.