LEXIBOOK GC500i Instruction Manual page 41

3.2.4 Zoom function
This function lets you enlarge or reduce the x- and y-coordinates. If you use the Trace or Plot function to
locate the pointer at a specific point on the graph, the enlargement / reduction is performed using the
pointer location as the center point.
Enlarging a graph
G
Example: to enlarge the graph for y=sinx by a factor of 1.5 on the x-axis and 2.0 on the y-axis. Use
the following range parameters for the original graph.
Xmin : -360
Xmax : 360
Xscl : 180
After specifying the range parameters, graph y=sinx.
Graph sin ALPHA
Press for the factor specification
SHIFT Factor
SHIFT Factor
1.5
EXE
2
EXE
Press to return to the display
SHIFT Factor
that was shown before entering the factor
display.
*** whenever you try to change the factor value while a graph is displayed, the display changes to
the text screen automatically. To return to the graph screen after changing the factor value,
press or .
G↔T EXE
Press to enlarge the graph according to the factors you specified.
SHIFT Zoom xf
SHIFT Zoom xf
Let's take another look at the range parameters.
Xmin : -240
Xmax : 240
Xscl : 180
If you press
SHIFT Zoom xf
the graph to its original size, press
Copyright L 2002
EXIBOOK
Ymin : -1.6
Ymax : 1.6
Yscl : 1
X EXE
(or )
G↔T
EXE
Ymin : -0.8
Ymax : 0.8
Yscl : 1
again, the graph is enlarged once more by the factors you specified. To return
.
SHIFT Zoom org
Xfact?
2.
Xfact?
1.5_
Yfact?
0.
Yfact?
2_
Yfact?
1.5
- 41 -
GB