HP 48gII Graphing, 50g Graphing manual Trunc, Truth, TRNCz, TRNCsymb, DIVPC, EXPAND, Series

Input/Output:

Level 2/Argument 1

Level 1/Argument 2

Level 1/Item 1

z1

ntruncate

→

z2

z

1

'symb

truncate

'

→

'TRNC(z

,symb

)'

1

truncate

'symb

'

n

truncate

→

'TRNC(symb

,n

)'

1

1

truncate

'symb

'

'symb

truncate

'

→

'TRNC(symb

,symb

)'

1

1

truncate

[ array ]1

ntruncate

→

[ array ]2

x_unit

ntruncate

→

y_unit

x_unit

'symb

truncate

'

→

'TRNC(x_unit,symb )'

truncate

Example 1:

(4.5792,8.1275) 2 TRNC returns (4.57,8.12).

Example 2:

[ 2.34907 3.96351 2.73453 ] 2 TRNC

returns [ 2.3 3.9 2.7 ].

See also:

RND

TRUNC

Type:

Function

Description:

Truncates a series expansion.

Access:

Catalog, …µ

Input:

Level 2/Argument 1: The expression that you want to truncate.

Level 1/Argument 2: The expression to truncate with respect to.

Output:

The expression from Level 2/Argument 1, with terms of order greater than or equal to the order

of the expression in Level 1/Argument 2 removed.

Flags:

Exact mode must be set (flag –105 clear).

Numeric mode must not be set (flag –3 clear).

Radians mode must be set (flag –17 set).

Example:

Expand the expression (x+1)7, and remove all terms in x4 and higher powers of x

Command:

TRUNC((X+1)^7,X^4)

Result:

35*X^3+21*X^2+7*X+1

See also:

DIVPC, EXPAND, SERIES

TRUTH

Command

Type:

Description:

Truth Plot Type Command: Sets the plot type to TRUTH.

When the plot type is TRUTH, the DRAW command plots the current equation as a truthvalued

function of two real variables. The current equation is specified in the reserved variable EQ. The

plotting parameters are specified in the reserved variable PPAR, which has this form:

{ (xmin, ymin) (xmax, ymax) indep res axes ptype depend }

For plot type TRUTH, the elements of PPAR are used as follows:

•

(xmin, ymin) is a complex number specifying the lower left corner of PICT (the lower left corner

of the display range). The default value is (–6.5,–3.1) for the HP 48gII and (–6.5,–3.9) for the

HP 50g and 49g+.

•

(xmax, ymax) is a complex number specifying the upper right corner of PICT (the upper right

corner of the display range). The default value is (6.5,3.2) for the HP 48gII and (6.5,4.0) for the

HP 50g and 49g+.

Full Command and Function Reference 3259