Texas Instruments TI-89 用户手册
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Basic Function Graphing
328
Zooming In and Out on a Point
Zooming In and Out on a Point
Zooming In and Out on a Point
Zooming In and Out on a Point
•
For a
ZoomIn
, the x variables are divided by
xFact
, and the y variables are
divided by
yFact
.
new
xmin = xmin/xFact
, etc.
•
For a
ZoomOut
, the x variables are multiplied by
xFact
, and the y variables are
multiplied by
yFact
.
new
xmin = xmin
ù
xFact
, etc.
Changing Zoom Factors
Changing Zoom Factors
Changing Zoom Factors
Changing Zoom Factors
The Zoom factors define the magnification and reduction used by
ZoomIn
and
ZoomOut
.
1. From the
„
Zoom
menu, select
2:ZoomIn
or
3:ZoomOut
.
A cursor appears, and the screen
prompts for
prompts for
New Center?
2. Move the cursor to the point where you
want to zoom in or out, and then press
¸.
The TI-89 Titanium adjusts the Window
variables by the
The TI-89 Titanium adjusts the Window
variables by the
Zoom
factors defined in
SetFactors
.