12-5-2

User-defined Functions

• Input user-defined function arguments as parameter

Parameter variable

variables. For more information about parameter

 

 

variables, see page “Configuring Parameter Variables

 

 

and Inputting Their Values” on page 12-2-7.

 

 

(6)After the function is the way you want, tap {, or tap [Edit] and then [Save File] to save it.

Tip

•A user-defined function can contain only a single mathematical expression.

An error “Invalid in a Function or Current Expression”occurs if a user-defined function contains multiple expressions.

•A user-defined function cannot contain any command.

kCreating a User-defined Function Using the Define Command

The procedure below describes how to create a user-defined function by executing the Define command from the Main application.

Syntax: Define [<folder name>\ ]<function name>([<variable name>[,<variable name>...]]) =<expression>

•Items inside of brackets ([ ]) can be skipped.

• indicates a space.

u ClassPad Operation

(1)On the application menu, tap J.

(2)Press k, and then tap the ((catalog) tab.

(3)On the catalog (cat) keyboard that appears, tap the [Form] down arrow button, and then select [Cmd].

(4)Scroll the list of commands until the Define command is visible, and then tap Define to select it.

(5)Tap [INPUT] to input the Define command.

(6)Input the function you want to define.

Example 1: Define folder1 \ f1(x) = 2x + 1 (where folder1 is an existing folder)

Example 2: Define f2(x, y) = 2x + 3y + 1

Example 3: Define sen(x) = sin (x)

(7)Tap wto store the function.

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