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4-10 Function Graphing
To leave the Window screen:
¦
Select another screen by pressing the appropriate key,
such as
,
or
(
.
¦
Press
2
.
to return to the Home screen.
To store to a Window variable from the Home screen or from
a program, begin on a blank line.
1. Enter the value (which can be an expression) that you
want to store.
2. Press
§
.
3. Press
L
to display the
VARS
menu.
4. Select
WINDOW...
to display the Window variables.
5. Select the Window variable. The name of the variable is
copied to the cursor location.
6. Press
¸
to complete the instruction.
Note: You can use a Window variable in an expression by
performing steps 3, 4, and 5.
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
=
62 46
@
X
and
@
Y
are not on the Window screen; however, 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
(7 and 8 on the
VARS WINDOW...
menu), in which case
XMAX
and
YMAX
are
immediately calculated from
@
X
,
XMIN
,
@
Y
, and
YMIN
.
Leaving the
Window Screen
Storing to a
Window Variable
from the Home
Screen or a
Program
@
X and
@
Y