Owner's Manual

Appendix A: Categorical Listing of Operations 811
DrwCtour CATALOG
DrwCtour expression
DrwCtour list
Draws contours on the current 3D graph at the z
values specified by
expression or list . The 3D
graphing mode must already be set.
DrwCtour
automatically sets the graph format style to
CONTOUR LEVELS.
By default, the graph automatically contains the
number of equally spaced contours specified by
the
ncontour Window variable. DrwCtour draws
contours in addition to the defaults.
To turn off the default contours, set
ncontour to
zero, either by using the Window screen or by
storing 0 to the
ncontour system variable.
In 3D graphing mode:
(1/5)x^2+(1/5)y^2ì 10!z1(x,y)
¸
Done
L10!xmin:10!xmax ¸ 10
L10!ymin:10!ymax ¸ 10
L10!zmin:10!zmax ¸ 10
0!ncontour ¸ 0
DrwCtour {L9,L4.5,L3,0,4.5,9}
¸
• Use the cursor to change the viewing
angle. Press 0 (zero) to return to the
original view.
To toggle between different graph format
styles, press:
@ Í
H F
• Press
X, Y, or Z to look down the
corresponding axis.
í @ ^ key H 2^key
mantissa E exponent
Enters a number in scientific notation. The
number is interpreted as
mantissa × 10
exponent
.
Hint: If you want to enter a power of 10 without
causing a decimal value result, use 10^
integer .
2.3í 4 ¸ 23000.
2.3í 9+4.1í 15 ¸ 4.1í 15
3ù 10^4 ¸ 30000
e ^() @ ¥ s key H 2s key
e ^( expression1 ) ⇒
⇒⇒
⇒ expression
Returns e raised to the expression1 power.
Note: On the TI-89 Titanium, pressing ¥ s to
display e^( is different from pressing j
[E] .
On the Voyage 200, pressing 2s to display
e^ is different from accessing the character e
from the QWERTY keyboard.
You can enter a complex number in
r e
i q
polar
form. However, use this form in Radian angle
mode only; it causes a
Domain error in Degree
angle mode.
e ^(1) ¸ e
e ^(1.) ¸ 2.718...
e ^(3)^2 ¸ e
9
e ^( list1 ) ⇒
⇒⇒
⇒ list
Returns e raised to the power of each element in
list1 .
e ^({1,1.,0,.5}) ¸
{
e 2.718... 1 1.648...}