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

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

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.

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.

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

uTo generate a table using a list

Example To generate a table using the values in List 6

• 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.

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.

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.

P.6

240

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

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

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.

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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242

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

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

-c.f

123456

P.146

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.

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

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

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)

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)

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

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