Casio FX-9750G User manual

Dual Graph
Dual Graph lets you split the display between two different screens,
which you can then use to draw different graphs at the same time.
Dual Graph gives you valuable graph analysis capabilities.
• You should be familiar with the contents of “8-3 Graph Function
Operations” before reading this chapter.
11-1 Before Using Dual Graph
11-2 Specifying the Left and Right View Window
Parameters
11-3 Drawing a Graph in the Active Screen
11-4 Displaying a Graph in the Inactive Screen
Chapter
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11-1 Before Using Dual Graph
From the Main Menu, enter the GRAPH Mode and set the Dual Screen setting to
“Graph”.
!Zcc1(Grph)
J
• For further details about the function key menu at the bottom of the display, see
“8-1 Before Trying to Draw a Graph”.
• 8,192 bytes of memory are used whenever you set the Dual Screen setting to
“Graph”.
kk
kk
kAbout Dual Graph Screen Types
The screen on the left side of the display is called the active screen , and the graph
on the left side of the display is called the active graph . Conversely, the right side is
the inactive screen containing the inactive graph . Any function that you execute while
using Dual Graph is always applied to the active graph. To execute a function on the
right-side inactive graph, you must first make it active by moving it into the active
screen.
Active Screen
Actual graph drawing is done here.
Inactive Screen
Use this screen to make copies of active screen
graphs, and for the result of Zoom operations.
You can also set different View Window param-
eters for the active and inactive screens.
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• Indicators appear to the right of the formulas in the function memory list to tell
where graphs are drawn with Dual Graph.
Indicates inactive graph (on right side of display)
Indicates graph drawn on both sides of display
If you redraw graphs in the situation shown above, the function marked “ R” is
drawn as the inactive graph, while “ B” is drawn using both sides of the display.
If you press 1(SEL), the “ R” and “ B” indicators are cleared, and the graphs
are drawn as active graphs.
Before Using Dual Graph 11 - 1

192
11-2 Specifying the Left and Right View Window
Parameters
You can specify different View Window parameteres for the left and right sides of the
graph display.
uu
uu
uTo specify View Window parameters
Press !3 (V-Window) to display the View Window parameter setting screen for
the active (left side) graph.
!3 (V-Window)
1(INIT)........ Initialization of View Window values
2(TRIG)...... InitializationofViewWindowvalues to match trigonometric units
3(STD) ....... View Window standard settings
4(STO) ....... Store settings in memory
5(RCL) ....... Recall settings from memory
6
(RIGHT) ... Swap active (left) screen and inactive (right) screen View
Window settings
6
(LEFT)
• Use the procedures described under “View Window (V-Window) Settings” to in-
put parameter values.
• Use the following key operations to change to different screens while inputting
View Window parameters for the left and right side screens.
While the View Window parameter setting screen for the active graph is shown:
6(RIGHT).............. Displays the inactive graph View Window param-
eter setting screen
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While the View Window parameter setting screen for the inactive graph is shown:
6(LEFT) ................ Displays the active graph View Window parameter
setting screen
Specifying the Left and Right View Window Parameters 11 - 2

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11-3 Drawing a Graph in the Active Screen
You can draw graphs only in the active screen. You can then copy or move the graph
to the inactive screen.
uu
uu
uDrawing a graph in the active screen
Example To draw the graph of y= x(x+ 1) (x– 1)
Use the following View Window parameters:
Input the function.
v(v+b)
(v-b)
Store the function.
w
Draw the graph.
6(DRAW) or w
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11-4 Displaying a Graph in the Inactive Screen
There are two methods you can use to display a graph in the inactive screen. You
can copy a graph from the active screen to the inactive screen, or you can move the
graph from the active screen to the inactive screen. In both cases, you must first
draw the graph in the left-side active screen.
kk
kk
kBefore Displaying a Graph in the Inactive Screen
After drawing a graph in the active screen, press K, and the Dual Graph function
menu appears at the bottom of the display.
K
1(COPY) .... Copies active graph to inactive screen
2(SWAP).... Switches active screen and inactive screen
3(PICT) ...... Picture function
kk
kk
kCopying the Active Graph to the Inactive Screen
Example To draw the graph for y= x(x+ 1) (x– 1) on the active screen and
the inactive screen
Use the following View Window parameters:
Active (Left) Screen Inactive (Right) Screen
View Window parameters View Window parameters
Assume that the function being graphed is stored in memory area Y1.
Draw the graph in the active
screen.
6(DRAW)
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Copy the graph to the inactive (right) screen.
K1(COPY)
• The graph is reproduced using the inactive screen View Window parameters.
kk
kk
kSwitching the Contents of the Active and Inactive Screens
Example To switch the screens produced by the preceding example
Switch the screens.
K2(SWAP)
• Note that using 2(SWAP) to switch the screens also switches their View
Window parameters.
kk
kk
kDrawing Different Graphs on the Active Screen and
Inactive Screen
Example To draw the graphs of the following functions on the screens
noted:
Active Screen: y= x(x+ 1) (x– 1)
Inactive Screen: y= 2x2– 3
Use the View Window parameters shown below.
Active (Left) Screen Inactive (Right) Screen
View Window parameters View Window parameters
Assume that the functions being graphed are stored in memory areas Y1 and Y2.
11 - 4 Displaying a Graph in the Inactive Screen

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Displaying a Graph in the Inactive Screen 11 - 4
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Select the function for the graph that you want to end up in the inactive (right) screen.
1(SEL)
Draw the graph in the active screen.
6(DRAW)
Swap the screens so the graph is on the inactive (right) screen.
K2(SWAP)
Select the function for the graph that you want in the now-empty active (left) screen.
A1(SEL)
Draw the graph.
6(DRAW)
• At this point, you could perform a copy operation and superimpose the active
graph over the inactive graph.
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K1(COPY)
• Pressing !6 (G ↔T) lets you switch between display of the active and
inactive graphs, using the entire display for each.
!6(G ↔T)
!6(G ↔T)
!6(G ↔T)
11 - 4 Displaying a Graph in the Inactive Screen

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kk
kk
kOther Graph Functions with Dual Graph
After drawing a graph using Dual Graph, you can use the trace, zoom, sketch and
scroll functions. Note, however, that these functions are available only for the active
(left) graph. For details on using these functions, see “8-6 Other Graphing Func-
tions”.
• To perform any of the above operations on the inactive graph, first move the
inactive graph to the active screen.
• The graph screen will not scroll while a trace operation is being performed on the
active graph.
The following shows some example operations using the zoom function.
Example 1 To use box zoom to enlarge the graph of y= x(x+ 1) (x– 1)
Use the following View Window parameters for the active graph.
Assume that the function is already stored in memory area Y1.
Draw the graph.
6(DRAW) or w
Specify one corner of the area to be enlarged.
!2(Zoom)1(BOX)
c~ce ~ew
• Use the cursor keys to move the pointer to the
location you want.
Displaying a Graph in the Inactive Screen 11 - 4
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Move the pointer to the other corner of the area to be enlarged.
f~fd ~d
Enlarge the graph.
w
• The View Window parameters of the inactive screen are always changed by a
Zoom operation, so if there is a graph already on the inactive screen, it is cleared
before the result of the Zoom operation is drawn there.
11 - 4 Displaying a Graph in the Inactive Screen