HP Prime Graphing Wireless Calculator Instrukcja Użytkownika Pobierz pdf (Strona 121)

100

101

Your new denition is added to the list of denitions.

Modifying a denition

1. Highlight the denition you want to modify, either by tapping on it or scrolling to it.

Tap .

The denition is copied to the entry line.

3. Modify the denition.

Tap or press when you have nished.

Denitional building blocks

The components that make up a symbolic denition can come from a number of sources.

●

From the keyboard

You can enter components directly from the keyboard. To enter 2X

– 3, just press 2 X

●

From user variables

If, for example, you have created a variable called COST, you could incorporate that into a denition

either by typing it or choosing it from the User menu (one of the sub-menus of the Variables menu).

Thus you could have a

denition that reads F1(X) = X

+ COST.

To select a user variable, press , tap , select User Variables, and then select the

variable of interest.

●

From Home variables

Some Home variables can be incorporated into a symbolic denition. To access a Home variable, press

, tap , select a category of variable, and select the variable of interest. Thus you could

have a denition that reads F1(X) = X

+ Q. (Q is on the Real sub-menu of the Home menu.)

●

From app variables

All settings, denitions, and results, for all apps, are stored as variables. Many of these variables can be

incorporated into a symbolic

denition. To access app variables, press , tap , select the

app, select the category of variable, and then select the variable of interest. You could, for instance, have

denition that reads F2(X) = X

+ X – Root. The value of the last root calculated in the Function app is

substituted for Root when this denition is evaluated.

●

From math functions

Some of the functions on the Math menu can be incorporated into a denition. The Math menu is one of

the Toolbox menus (

). The following denition combines a math function (Size) with a Home

variable (L1): F4(X) = X

– SIZE(L1). It is equivalent to x

– n where n is the number of elements in the list

named L1. (Size is an option on the List menu, which is a sub-menu of the Math menu.)

Common operations in Symbolic view 73

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