HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010

Plot-Table

The next item on the

VIEWS menu is Plot-Table. This option plots the

graph on the right, with the Numeric view on the right half screen.

Using the left/right arrow keys moves the cursor in both the graph and

the numeric windows.

See page 79 for information on how to keep nice

scales in the table view. When more than one function defined in the

SYMB view, pressing the up or down arrows changes the table focus

from one to another. In this case, with only one, it centers the table.

1( )

Let us switch now to a graph of the two functions

FX X

−1 and

FX X − 52( ) =

+ 2 X X − 4 . This is shown on the right, using an XRng

of -8 to 8.

Choosing Plot-Table gives the result shown left. As you can see, the

scale has been preserved unchanged, although without labels. The table

on the right also uses a sensible scale of 0

25 because of the choice of

an x axis scale of -8 to 8. As mentioned, choice of scale in the

Plot-

Table

view is discussed in detail on page 79. The technique is requires

slightly different values than the default values in the

PLOT SETUP

view.

Looking at the table heading you will see that it currently shows the

function

F1(X). The left/right arrow keys move within that function, with

the cursor keeping track. Pressing the up/down arrows now not only

centers the table highlight but, more importantly switches from

F1(X) to

F2(X). The X column does not change.