HP NW280AAABA Uživatelský manuál stáhnout pdf (Strana 427)

100

101

Functions and commands 421

 Inserts a template for a summation expression.

 Inserts a minus sign.

 Inserts a square root sign.

 Inserts a template for an antiderivative expression.

 Inequality test. Returns 1 if the left and right sides are not

equal and 0 if they are equal.

 Less than or equal inequality test. Returns 1 if the left side of

the inequality is less than the right side or if the two sides are

equal, and 0 otherwise.

 Greater than or equal inequality test. Returns 1 if the left side

of the inequality is greater than the right side or if the two

sides are equal, and 0 otherwise.

 Evaluates the expression then stores the result in variable var.

Note that

 cannot be used with the graphics G0–G9. See the

command BLIT.

expression  var

i Inserts the imaginary number i.

–1

Returns the inverse of an expression.

(Expr)

–1

Creating your own functions

You can create your own function by writing a program (see

chapter 27) or by using the simpler DEFINE functionality.

Functions you create yourself appear on the User menu (one

of the Toolbox menus).

Suppose you wanted to create the function

SINCOS(A,B)=SIN(A)+COS(B)+C.

1. Press

Sd (Define).

2. In the Name field, enter

a name for the

function—for example,

SINCOS—and tap

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