Casio CFX-9850G PLUS Manuel utilisateur

Graph-to-Table

With this function, the screen shows both a graph and a table.

You can move a pointer around the graph and store its current

coordinates inside the table whenever you want. This function is

very useful for summarizing graph analysis results.

•Be sure to read “Chapter 8 Graphing” and “Chapter 9 Graph

Solve” before trying to perform any of the operations described

in this chapter.

12-1 Before Using Graph-to-Table

12-2 Using Graph-to-Table

Chapter

176

12-1 Before Using Graph-to-Table

1. In the Main Menu, select the GRAPH icon and enter the GRAPH Mode. Next,

use the set up screen to set the Dual Screen item to “G to T”.

2. Press Jand the Graph-to-Table menu appears.

•For the meaning of the items in the function menu at the bottom of the screen,

see “8-1 Before Trying to Draw a Graph”.

•Whenever the set up screen’s Dual Screen item is set to “G to T”, you can

only store rectangular coordinate (Y=), polar coordinate (r=), and parametric

function graphs in memory.

•You cannot use Graph-to-Table to display split graph/table screens using

X=constant or inequality graphs of functions stored in the GRAPH or TABLE

Mode.

P. 7

P. 11 2

177

12-2 Using Graph-to-Table

uTo store graph pointer coordinates in a table

•If the Derivative item in the set up screen is set to “On”, the derivative at the

location of the trace pointer is also stored in the table.

Example To store the points of intersection and the coordinates for the

following graphs where X = 0:

Y1 = x2– 3 Y2 = –x+ 2

Use the following View Window parameters.

Xmin = –5 Ymin = –10

Xmax = 5 Ymax = 10

Xscale = 1 Yscale = 2

1. Input the two functions.

2. Press 6(DRAW) (or w) to draw the

graph in the left half of the screen.

3. Press 1(Trace) and then use dto move the pointer to the first intersection.

4. Press wto store the coordinates of

the pointer location in the table on the

right side of the screen.

5. Use eto move the pointer to the point

where X = 0 and then press w.

Next, move the pointer to the next

intersection and press wagain.

P. 5

-coordinate value

178

6. Pressing Acauses the highlighting to

appear in the table. You can then use

the cursor keys to move the highlighting

around the table and check its values.

Press Aagain to return the pointer to

the graph screen.

uTo save numeric table values in a list file

You can save columns of values into list files. Up to six values can be stored in a

list file.

•The highlighting can be located in any row of the column whose data you want

to save in the list.

Example To save the x-coordinate data of the previous example in List 1.

1. Starting from the screen that appears in step 6 of the previous example, press

K. The following function menu appears.

• {CHNG} ... {changes the active screen (between left and right)}

• {LMEM} ... {saves table column to list file}

• {PICT} ... {saves graph data to graph memory}

2. Press 2(LMEM).

3. Press 1(List1) to store the data in the x-coordinate column into List 1.

•Table data uses the same memory as TABLE menu table data.

•Always be sure to store table data into a list.

•Any of the following operations causes table data to be deleted.

—Editing expression data

—Changing set up screen or View Window settings

—Changing to a different mode

•If you save data into a list that already contains data, the previous data is

replaced with the new data.

•For details on recalling numeric data saved in a list file, see “17. List Function”.

12 - 2 Using Graph-to-Table

P. 139

P. 229

179

Using Graph-to-Table 12 - 2

kGraph-to-Table Precautions

•The only coordinates that can be saved in the table are those where the

pointer can move to using trace and graph solve.

•The only graph functions that can be used with a graph produced using the

Graph-to-Table are: trace, scroll, zoom, and graph solve (excluding integra-

tion calculations).

•Graph functions cannot be used while the highlighting is blinking in the table.

To clear the highlighting and make the graph side the active screen, press

K1(CHNG).

•Kkey operation is disabled whenever a graph and table are both on the

screen and there is no numeric data in the table, and when the screen is not

split (i.e. when either the graph or table only is on the display).

•An error occurs if a graph for which a range is specified or an overwrite graph

is included among the graph expressions.

180

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