HP 48gII Graphing, 50g Graphing manual Syseval, Sylvester, SYST2MAT

See also:	DUP, DUPN, DUP2, OVER, PICK, ROLL, ROLLD, ROT
SYSEVAL	Command
Type:
Description:	Evaluate System Object Command: Evaluates unnamed operating system objects specified by
	their memory addresses.

WARNING: Use extreme care when executing this function. Using SYSEVAL with random addresses will almost always cause a memory loss. Do not use this function unless you know what you are doing.

Access:	…µSYSEVAL
Input/Output:
			Level 1/Argument 1	Level 1/Item 1
			#naddress	→
	Display the
Example:			version string of a calculator by executing #2F389h SYSEVAL. This should
	display "HPHP49C" .
See also:	EVAL, LIBEVAL, FLASHEVAL
SYLVESTER
Type:	Command
Description:	For a symmetric matrix A, returns D and P where D is a diagonal matrix and
	A = PTDP
Access:	!Ø QUADF
Input:	A symmetric matrix.
Output:	Level 2/Item 1: the diagonal matrix, D.
	Level 1/Item 2: The matrix P.
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:	Rewrite in PTDP form the matrix:
		1 2
		2 4
Command:
	SYLVESTER([1, 2][2, 4])
Result:	{[1, 0], [[1, 2][0, 1]]}
SYST2MAT
Type:	Command
Description:	Converts a system of linear equations in algebraic form to matrix form.
Access:	!Ú MATRX, Matrices, !Ø LINEAR SYSTEMS
Input:	Level 2/Argument 1: A vector containing a system of linear equations. An expression with no
	equal sign is treated as an equation setting the expression equal to zero.
	Level 1/Argument 2: A vector whose elements are the system’s variables. The variables must not
	exist in the current path.
Output:	A matrix that represents the system of linear equations.
Flags:	Exact mode must be set (flag –105 clear).
	Numeric mode must not be set (flag –3 clear).

Full Command and Function Reference 3245