Operation Manual

Function Graphing 3-19
8203FUNC.DOC TI-82, Chapter 3, English Bob Fedorisko Revised: 02/09/01 9:06 AM Printed: 02/09/01
12:36 PM Page 19 of 24
Using ZOOM MEMORY
ZPrevious allows you to return to the WINDOW displayed prior to the previous
ZOOM. ZoomSto stores the values of the current WINDOW variables to user-
defined ZOOM MEMORY variables. ZoomRcl changes the WINDOW to the values
stored with ZoomSto.
ZOOM MEMORY Menu
ZOOM MEMORY
1: ZPrevious
Uses previous viewing
WINDOW
.
2: ZoomSto
Stores user-defined
WINDOW
.
3: ZoomRcl
Recalls user-defined
WINDOW
.
4: SetFactors
…
Changes
Zoom In
,
Zoom Out
factors.
ZPrevious
When you select
ZPrevious
from the
ZOOM MEMORY
menu, the graph is
replotted using the
WINDOW
variables of the graph displayed prior to the
previous
ZOOM
that you did.
ZoomSto
To store the current viewing
WINDOW
, select
ZoomSto
from the
ZOOM MEMORY
menu. The graph is displayed if necessary, and the values
of the current
WINDOW
variables are stored in the user-defined
ZOOM
variables:
ZXmin
,
ZXmax
,
ZXscl
,
ZYmin
,
ZYmax
, and
ZYscl
. The action is
immediate, there is no prompting on the display.
These variables are global; they apply to all graphing modes. For example,
changing the value of
ZXmin
in
Func
MODE
also changes it in
Par
MODE
.
The user-defined
WINDOW
variables contain the standard values until you
store to them the first time.
ZoomRcl
To view the selected graphing functions in the user-defined
WINDOW
,
select
ZoomRcl
from the
ZOOM MEMORY
menu. The
WINDOW
variables
are updated with the user-defined values, and the graph is plotted.
Using ZOOM MEMORY from the Home Screen or a Program
From the Home screen or a program, you can store directly to any of the
user-defined
ZOOM
variables.
From a program, you can select the
ZoomSto
or
ZoomRcl
instructions from
the
ZOOM MEMORY
menu.