HP 50g Graphing, 48gII Graphing manual Froots, Fs?, Display Area Value Code, CLLCD, DISP, Halt

Display Area	Value Code
Status area	1
History/Stack/Commandline area	2
Menu area	4

So, for example, 2 FREEZE freezes the history/stack/commandline area, 3 FREEZE freezes the status area and the history/stack/commandline area, and 7 FREEZE freezes all three areas. Values of ndisplay area ≥ 7 or ≤ 0 freeze the entire display (are equivalent to value 7). To freeze the graphics display, you must freeze the status and stack/commandline areas (by entering 3), or the entire display (by entering 7).

Access:	!°LOUT FREEZE		( °is the leftshift of the	Nkey).
Input/Output:
		Level 1/Argument 1		Level 1/Item 1
		ndisplayarea	→
Example 1:	This program:
	« "Ready for data" 1 DISP 1 FREEZE HALT »
	displays the contents of the string in the top line of the display, then freezes the status area so that
	the string contents persist in the display after HALT is executed.
Example 2:	This program:
	« { # 0d # 0d } PVIEW 7 FREEZE »
	selects the graphics display and then freezes the entire display so that the graphics display persists
	after the program ends. (If FREEZE was not executed, the stack display would be selected after
	the program ends.) To use FREEZE with PVIEW (or any graphics display), you must enter 3 or
	7.
Flags:	None
See also:	CLLCD, DISP, HALT
FROOTS
Type:	Command
Description:	For a rational polynomial, returns an array of its roots and poles, with their corresponding
	multiplicities. This is the inverse of FCOEF and uses the same notation for roots and poles.

Access: Arithmetic, !ÞPOLY L

Input: A rational polynomial.

Output: An array of the form [Root 1, Multiplicity 1, Root 2, Multiplicity 2, . . .] A negative multiplicity indicates a pole.

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).

If complex mode is set (flag –103 set), FROOTS looks for complex solutions as well as real solutions.

If approximate mode is set (flag –105 set) FROOTS searches for numeric roots.

See also:	FCOEF
FS?	Command
Type:
Description:	Flag Set? Command: Tests whether the system or user flag specified by nflag number is set, and
	returns a corresponding test result: 1 (true) if the flag is set or 0 (false) if the flag is clear.
Access:	!°TEST LLFS?	( °is the leftshift of the Nkey).

392 Full Command and Function Reference