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
15

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.
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207
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
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.
uu
uu
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
uu
uu
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.
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 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.
uu
uu
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.
kk
kk
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
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 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
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
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
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 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
kk
kk
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}
uu
uu
uTo delete a row
Example To delete Row 2 of the table generated on page 208
3(ROW)c1(DEL)
uu
uu
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)
uu
uu
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
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213
kk
kk
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.
kk
kk
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
uu
uu
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}
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.
Editing Tables and Drawing Graphs 15 - 4
P. 208
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214
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.)
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 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

215
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 area Y1, displaying both the
graph and its table
Use the same View Window parameters as in the example on page
214.
Display the set up screen and specify “T+G” for Dual Screen. Press
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. 7
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Editing Tables and Drawing Graphs 15 - 4

216
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 that corresponds the list you want to copy to.
1(List1)
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