HP 48gII Graphing, 50g Graphing manual Choose, Chr, Command Result

Example: Find the Cholesky factorization of:

1 1

1 5

						
					1 1
	CHOLESKY					
Command:					1 5	
		1 1
Result:		0 2
CHOOSE	Command
Type:
Description:	Create UserDefined Choose Box Command: Creates a						userdefined choose box.
	CHOOSE creates a standard singlechoice choose box						based on the following specifications:
				Variable		Function
			“prompt”			A message that appears at the top of choose box. If “prompt” is an
						empty string (“”), no message is displayed.
			{c1 … cn}			Definitions that appear within the choose box. A choice definition
						(cx) can have two formats.

•obj, any object

•{ objdisplay objresult }, the object to be displayed followed by the result returned to the stack if that object is selected.

npos	The position number of an item definition. This item is highlighted
	when the choose box appears. If npos = 0, no item is highlighted, and
	the choose box can be used to view items only.

If you choose an item from the choose box and press OK, CHOOSE returns the result (or the object itself if no result is specified) to level 2 and 1 to level 1. If you press −, CHOOSE returns 0. Also, if npos = 0, CHOOSE returns 0.

Access:	!°LIN CHOOSE				( °is the leftshift of the Nkey).
Input/Output:
		L3/A1	L2/A2		L1/A3		L2/I1	L1/I2
		“prompt”	{ c1	... cn }	npos	→	obj or result	“1”
		“prompt”	{ c1	... cn }	npos	→		“0”

L = Level; A = Argument; I = item

Example: CHOOSE with the following three lines as input would produce a threeline choose box:

"Select a Program"

{{ "Pie Chart" «PIE» } { "Inverse Function" «ROOTR» }

{"Animate Taylor" «TSA» } }

1

See also: INFORM, NOVAL

CHR

Type: Command

Description: Character Command: Returns a string representing the character corresponding to the character code n.

Full Command and Function Reference 335