Casio CFX-9850G PLUS 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

206

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.

• {SEL} ... {numeric table generation/non-generation status}

• {DEL} ... {function delete}

• {TYPE} ... {function type specification}

• {COLR} ... {graph color specification}

•{RANG} ... {table range specification screen}

• {TABL} ... {start numeric table generation}

•Note that the {RANG} item does not appear when a list name is specified for

the Variable item in the set up screen.

CFX

207

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

generating a numeric table.

• Table range method

With this method, you specify the conditions for the change in value of the

variable.

• 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

ExampleTo generate a table as the value of variable xchanges 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.

Start ................ Variable xstart value

End ................. Variable xend value

pitch ................ Variable xvalue change

After specifying the table range, press Jto return to the function list.

208

uTo generate a table using a list

1. In the TABLE Mode, display the set up screen.

2. Highlight Variable and then press 2(LIST) to display the list menu.

3. Select the list you want to use.

•To select List 6, for example, press 6(List6). This causes the setting of the

Variable item of the set up screen to change to List 6.

4. After specifying the list you want to use, press Jto return to the previous

screen.

•Note that the {RANG} item of the TABLE Mode 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 generate a

table for and press 1(SEL) to select it.

The “=” sign of selected functions is highlighted on the screen. To deselect a

function, move the cursor to it and press 1(SEL) again.

Press 6(TABL) or wto generate a numeric table using the functions you

selected. The value of variable xchanges according to the range or the contents

of the list you specified.

Each cell can contain up to six digits, including negative sign.

15 - 2 Storing a Function and Generating a Numeric Table

209

You can use cursor keys to 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

calculator’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 in the selected cell (in columns Y1, Y2, etc.)

•To change xvariable values by replacing values in column X.

Press 1(FORM) to return to the TABLE Mode function list.

uTo generate a differential numeric table

Changing the setting of set up screen's Derivative item to “On” causes a numeric

table that includes the derivative to be displayed 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.

kSpecifying the function type

You can specify a function as being one of three types.

•Rectangular coordinate (Y=)

•Polar coordinate (r=)

•Parametric (Parm)

1. To display the menu of function types, press 3(TYPE) while the function list

is on the screen.

2. Press the function key 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.

Storing a Function and Generating a Numeric Table 15 - 2

P. 5

Locating the cursor at a differential

coefficient displays “

dy/dx

” in the top line

to indicate differential.

210

15 - 2 Storing a Function and Generating a Numeric Table

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 in the TABLE Mode list 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

1. Use fand cto move the highlighting to the function you want to delete and

then press 2(DEL).

2. Press 1(YES) to delete the function or 6(NO) to abort the operation

without deleting anything.

211

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.

• {FORM} ... {display function list}

• {DEL} ... {delete table}

•{ROW} ... {display menu of row operations}

•{G·CON}/{G·PLT} ... {connected type}/{draw plot type} graph draw

uTo change variable values in a table

Example To change the value in Column x, Row 3 of the table generated

on page 208 from – 1 to – 2.5

cc -c.fw

•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 error occurs and the original value remains unchanged.

•You cannot directly change any values in the other (non-x) columns of the

table.

P. 128

212

kRow Operations

The following menu appears whenever you press 3(ROW) while the table menu

is on the display.

• {DEL} ... {delete row}

• {INS} ... {insert row}

• {ADD} ... {add row}

uTo delete a row

Example To delete Row 2 of the table generated on page 208

3(ROW)c1(DEL)

uTo insert a row

Example To insert a new row between Rows 1 and 2 in the table gener-

ated on page 208

3(ROW)c2(INS)

uTo add a row

ExampleTo add a new row below Row 7 in the table generated on page

208

3(ROW)cccccc 3(ADD)

15 - 4 Editing Tables and Drawing Graphs

123456

213

kDeleting a Table

1. Display the table you want to delete and then press 2(DEL).

2. Press 1(YES) to delete the table or 6(NO) to abort the operation without

deleting anything.

kGraphing a Function

Before drawing a function graph, you must first specify the following.

•Graph color (blue, orange, green)

•Draw/non-draw status of the function

uTo specify the graph color

The default color for a graph is blue. Use the following procedure to change the

graph color to orange or green.

1. Display the function list and then use fand cto highlight the function

whose graph color you want to change.

2. Press 4(COLR).

3. Press the function key that corresponds to the color you want to specify.

•{Blue}/{Orng}/{Grn} .. {blue}/{orange}/{green}

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.

Editing Tables and Drawing Graphs 15 - 4

P. 208

CFX

214

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.)

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 example 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 Graphing Functions”.

15 - 4 Editing Tables and Drawing Graphs

No highlighting

P. 128

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