Operation Manual
Function Graphing 3-9
8203FUNC.DOC TI-82, Chapter 3, English Bob Fedorisko Revised: 02/09/01 9:06 AM Printed: 02/09/01
12:36 PM Page 9 of 24
Leaving the WINDOW Edit Screen
To leave the
WINDOW
edit screen:
¦
Select another screen by pressing the appropriate key, such as
s
or
o
.
¦
Press
y
ã
QUIT
ä
to return to the Home screen.
Storing to a WINDOW Variable from the Home Screen or a Program
Begin on a blank line.
1. Enter the value you want to store (which can be an expression).
2. Press
¿
.
3. Press
to display the
VARS
menu.
4. Select
Window...
to display the
WINDOW
variables.
5. Select the
WINDOW
variable to which you want to store. The name of
the variable is copied to the cursor location where you are editing.
6. Press
Í
to complete the instruction.
When the instruction is executed, the TI
.
82 stores the value in the
WINDOW
variable.
Note: You can use a
WINDOW
variable in an expression by performing
steps 3, 4, and 5.
@
X and
@
Y
The variables
@
X
and
@
Y
define the distance between the centers of two
adjoining pixels on a graph (graphing accuracy).
(
Xmax
–
Xmin
)(
Ymax
–
Ymin
)
@
X
=
@
Y
=
94 62
@
X
and
@
Y
are not on the
WINDOW
screen; they are accessible through the
VARS Window
menu.
@
X
and
@
Y
are calculated from
Xmin
,
Xmax
,
Ymin
, and
Ymax
when a graph is displayed.
You can store values directly to
@
X
and
@
Y
, in which case
Xmax
and
Ymax
are calculated from
@
X
,
Xmin
,
@
Y
, and
Ymin
immediately.