Chinrem; Cholesky; Choose; Chr - HP 48gII Advanced User's Reference Manual

CHINREM

CAS: Solve a system of simultaneous polynomial congruences in the ring Z[x].

CHOLESKY

CAS: Return the Cholesky factorization of a square matrix.

CHOOSE

Type: Command
Description: Create User-Defined Choose Box Command: Creates a user-defined choose box.
CHOOSE creates a standard single-choice choose box based on the following specifications:
Variable
"prompt"
{c ... c
1
n
pos
If you choose an item from the choose box and press
object itself if no result is specified) to level 2 and 1 to level 1. If you press −, CHOOSE
returns 0. Also, if n
!°L
Access:
Input/Output:
See also: INFORM, NOVAL

CHR

Type: Command
Description: Character Command: Returns a string representing the character corresponding to the character
code n.
The character codes are an extension of ISO 8859/1. Codes 128 through 160 are unique to the
hp49g+/hp48gII.
The default character ! is supplied for all character codes that are not part of the normal
hp49g+/hp48gII display character set.
Character code 0 is used for the special purpose of marking the end of the command line.
Attempting to edit a string containing this character causes the error Can ' t Edit Null Char.
You can use the CHARS application to find the character code for any character used by the
hp49g+/hp48gII. See "Additional Character Set" in Appendix D of the hp49g+/hp48gII User ' s
Guide.
!°
Access:
A message that appears at the top of choose box. If "prompt" is an
empty string (""), no message is displayed.
Definitions that appear within the choose box. A choice definition
}
n
(c ) can have two formats.
x
• obj, any object
• { obj
returned to the stack if that object is selected.
The position number of an item definition. This item is highlighted
when the choose box appears. If n
the choose box can be used to view items only.
= 0, CHOOSE returns 0.
pos
IN CHOOSE
L3/A1 L2/A2
"prompt" { c ... c
1
"prompt" { c ... c
1
L = Level; A = Argument; I = item
L
TYPE CHR
Function
obj }, the object to be displayed followed by the result
display result
, CHOOSE returns the result (or the
OK
( °is the left-shift of the Nkey).
L1/A3
} n
n pos
} n
n pos
( °is the left-shift of the Nkey).
Full Command and Function Reference 3-27
= 0, no item is highlighted, and
pos
L2/I1
obj or result
L1/I2
"1"
"0"