Casio FX-9750G User manual

Table & Graph
With Table & Graph, you can generate tables of discreet data from
functions and recursion formulas, and then use the values for
graphing. Because of this, Table & Graph makes it easy to grasp
the nature of numeric tables and recursion formulas.
15-1 Before Using Table & Graph
15-2 Storing a Function and Generating a Numeric Table
15-3 Editing and Deleting Functions
15-4 Editing Tables and Drawing Graphs
15-5 Copying a Table Column to a List
Chapter
15

236
15-1 Before Using Table & Graph
First select the TABLE icon on the Main Menu and then enter the TABLE Mode.
When you do, the table function list appears on the display.
1(SEL)........ Numeric table generation/non-generation status
2(DEL) ....... Function delete
3(TYPE) ..... Function type specification
5(RANG) .... Table range specification screen
6(TABL)...... Start numeric table generation
• Note that the item for function key 5(RANG) does not appear when a list name
is specified for the Variable item in the set up screen.
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237
15-2 Storing a Function and Generating a Numeric
Table
uu
uu
uTo store a function
Example To store the function y= 3x2– 2 in memory area Y1
Use fand cto move the highlighting in the TABLE Mode function list to the
memory area where you want to store the function. Next, input the function and
press wto store it.
kk
kk
kVariable Specifications
There are two methods you can use to specify value for the variable xwhen gener-
ating a numeric table.
• Table range method
With this method, you specify the conditions for the change in value of the vari-
able.
• List
With this method, you substitute the values contained in a previously created list
for the value of the variable.
uu
uu
uTo generate a table using a table range
Example To generate a table as the value of variable xchange from –3 to 3,
in increments of 1
5(RANG)
-dwdwbw
The numeric table range defines the conditions under which the value of variable x
changes during function calculation. The following is the meaning of each of the
numeric table range parameters.
Start................ Variable xstart value
End ................. Variable xend value
pitch................ Variable xvalue change
After specifying the table range, press Jto return to the function list.

238
uu
uu
uTo generate a table using a list
Example To generate a table using the values in List 6
!Z
• If the highlighting is not located at the Variable item, use fand cto move it
there.
2(LIST)6(List6)
After specifying the list you want to use, press Jto return to the previous screen.
• Note that the RANG item for function key 5of the TABLE Menu function list
does not appear when a list name is specified for the Variable item of the set up
screen.
kk
kk
kGenerating a Table
Example To generate a table of values for the functions stored in
memory areas Y1 and Y3 of the TABLE Mode function list
Use fand cto move the highlighting to the function you want to select for table
generation and press 1(SEL) to select it.
The “=” sign of selected functions are highlighted on the screen. To deselect a func-
tion, move the cursor to it and press 1(SEL) again.
Press 6(TABL) or wto generate a numeric table using the functions you se-
lected. The value of variable xchanges according to the range or the contents of the
list you specified.
15 - 2 Storing a Function and Generating a Numeric Table
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239
6(TABL)
Each cell can contain up to six digits, including negative sign.
You can use d, e, f, and cto move the highlighting around the table for the
following purposes.
• To display the selected cell’s value at the bottom of the screen, using the calcula-
tor’s current number of decimal place, number of significant digit, and exponential
display range settings.
• To scroll the display and view parts of the table that do not fit in the display.
• To display at the top of the screen the scientific function that produced the value
the selected cell (in columns Y1, Y2, etc.)
• To change xvariable values by replacing values in column X.
Press 1(FORM) to return to theTABLE Mode function list.
uu
uu
uTo generate a differential numeric table
In the set up screen, change the setting of the Derivative item to On. Once you do
this, the derivative is shown on the display whenever you generate a numeric table.
• An error occurs if a graph for which a range is specified or an overwrite graph is
included among the graph expressions.
Storing a Function and Generating a Numeric Table 15 - 2
Locating the cursor at a differential
coefficient displays the derived function.
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240
kk
kk
kSpecifying the function type
You can specify a function as being one of three types.
• Rectangular coordinate
• Polar coordinate
• Parametric
To display the menu of function types, press 3(TYPE) while the function list is on
the screen.
3(TYPE)
Press the function key (1, 2, 3) that corresponds to the function type you want
to specify.
• When you generate a numeric table, a table is generated only for the function
type you specify here.
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15 - 2 Storing a Function and Generating a Numeric Table

241
15-3 Editing and Deleting Functions
uu
uu
uTo edit a function
Example To change the function in memory area Y1 from y= 3x2– 2 to
y= 3x2– 5
Use fand cto move the highlighting to the function you want to edit.
Use dand eto move the cursor to the location of the change.
eeeeef
w
6(TABL)
• The Function Link Feature automatically reflects any changes you make to
functions in the TABLE Mode list in the GRAPH Mode and DYNA Mode lists.
uu
uu
uTo delete a function
Use fand cto move the highlighting to the function you want to delete and then
press 2(DEL).
2(DEL)
Press 1(YES) to delete the function or 6(NO) to abort the operation without
deleting anything.
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15-4 Editing Tables and Drawing Graphs
You can use the table menu to perform any of the following operations once you
generate a table.
• Change the values of variable x
• Edit (delete, insert, and append) rows
• Delete a table
• Draw a connect type graph
• Draw a plot type graph
While the Table & Graph menu is on the display, press 6(TABL) to display the
table menu.
6(TABL)
1(FORM).... Display function list
2(DEL) ....... Delete table
3(ROW)...... Display menu of row operations
5(G•CON) .. Draw connected type graph
6(G•PLT) .... Draw plot type graph
uu
uu
uTo change variable values in a table
Example To change the value in Column x, Row 3 of the table generated
on page 239 from – 1 to – 2.5
cc
-c.f
w
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243
• When you change a variable value in Column x, all values in the columns to the
right are recalculated and displayed.
• If you try to replace a value with an illegal operation (such as division by zero), an
Ma ERROR occurs and the original value remains unchanged.
• You cannot directly change any values in the other (non-x) columns of the table.
kk
kk
kRow Operations
The following menu appears whenever you press 3(ROW) while the table menu
is on the display.
3(ROW)
1(DEL) ....... Delete row
2(INS) ........ Insert row
3(ADD)....... Add row
uu
uu
uTo delete a row
Example To delete Row 2 of the table generated on page 239
3(ROW)c
1(DEL)
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Editing Tables and Drawing Graphs 15 - 4

244
uu
uu
uTo insert a row
Example To insert a new row between Rows 1 and 2 in the table generated
on page 239
3(ROW)c
2(INS)
uu
uu
uTo add a row
Example To add a new row below Row 7 in the table generated on page 239
3(ROW)
cccccc
3(ADD)
kk
kk
kDeleting a Table
1. Display the table you want to delete and then press 2(DEL).
2(DEL)
2. Press 1(YES) to delete the table or 6(NO) to abort the operation without
deleting anything.
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15 - 4 Editing Tables and Drawing Graphs

245
kk
kk
kGraphing a Function
uu
uu
uTo specify the draw/non-draw status of a formula
There are two options for the draw/non-draw status of a function graph.
• For the selected function only
• Overlay the graphs for all functions
To specify the draw/non-draw status, use same procedure as that for specifying
table generation/non-generation status.
uu
uu
uTo graph only a selected function
Example To graph y= 3x2– 2, which is stored in memory area Y1, as a
connect type graph.
Use the following View Window parameters.
Xmin = 0 Ymin = –2
Xmax = 6 Ymax = 106
Xscale = 1 Yscale = 2
c1(SEL)
(Specifies graph non-draw.)
6(TABL)
5(G•CON)
(Specifies connect type graph.)
Editing Tables and Drawing Graphs 15 - 4
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No highlighting
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246
uu
uu
uTo graph all of the functions
Example To use the values in the numeric table generated using the Table
Range and the View Window parameters from the previous ex-
ample to graph all functions stored in memory as plot type graphs.
6(TABL)
6(G•PLT)
(Specifies plot type graph.)
• After you graph a function, you can press !6 (G↔T) or Ato return to the
function’s numeric table.
• After graphing a function, you can use the trace, zoom, sketch functions. For
details, see “8-6 Other Graph Functions”.
15 - 4 Editing Tables and Drawing Graphs
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247
uu
uu
uTo graph a function using Dual Screen
Selecting “T+G” for the Dual Screen item of the set up screen makes it possible to
display both the graph and its numeric table of values.
Example To graph y= 3x2– 2 in memory are Y1, displaying both the graph
and its table
Use the same View Window parameters as in the example on page
245.
!Z
cc1(T+G)
(Specifies T+G for Dual Screen.)
J
6(TABL)
(Shows the table.)
6(G•PLT)
(Draws plot type graph.)
• Pressing !6 (G↔T) causes the graph on the left side of the Dual Screen to
fill the entire display. Note that you cannot use the sketch function while a graph
is displayed using !6 (G↔T).
P.8
Editing Tables and Drawing Graphs 15 - 4
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15-5 Copying a Table Column to a List
A simple operation lets you copy the contents of a numeric table column into a list.
uu
uu
uTo copy a table to a list
Example To copy the contents of Column xinto List 1
K1(LIST)2(LMEM)
• You can select any row of the column you want to copy.
Press the function key (1to 6) that corresponds the list you want to copy to.
1(List1)