HP 50g Graphing, 48gII Graphing manual Factor, …µF0λ

xpoint, ypoint, and zpoint are real numbers that set the x, y, and zcoordi nates as the eyepoint from which to view a 3D plot’s view volume. The ycoordi nate must always be 1 unit less than the view volume’s nearest point (ynear of YVOL). These coordinates are stored in the reserved variable VPAR.

Access:	…µEYEPT
Input/Output:
		Level 3/Argument 1	Level 2/Argument 2	Level 1/Argument 3	Level 1/Item 1
		xpoint	ypoint	zpoint	→
See also:	NUMX, NUMY, XVOL, XXRNG, YVOL, YYRNG, ZVOL
F0λ	Function
Type:

Description: Black Body Emissive Power Function: Returns the fraction of total blackbody emissive power at temperature xT between wavelengths 0 and ylambda. If units are not specified, ylambda has implied units of meters and xT has implied units of K.

F0λ returns a dimensionless fraction.

Access:	…µF0λ
Flags:	Numerical Results (–3)
Input/Output:
		Level 2/Argument 1		Level 1/Argument 2		Level 1/Item 1
		ylambda		xT	→	xpower
		y	lambda	'symb'	→	lambda
						'F0λ(y ,symb)'
		'symb'		xT	→	'F0λ(symb,xT)'
		'symb1'		'symb2'	→	'F0λ(symb1,symb2)'
FACT	Command
Type:

Description: Factorial (Gamma) Function: FACT is the same as ! and is provided for compatibility with the HP 28. See !.

Access: …µFACT

Flags: Numerical Results (–3), Underflow Exception (–20), Overflow Exception (–21)

Input/Output:

Level 1/Argument 1		Level 1/Item 1
n	→	n!
x	→	Γ(x + 1)
'symb'	→	'(symb)!'

See also: COMB, PERM, !

FACTOR

Type: Command

Description: Factorizes a polynomial or an integer:

•The function expresses a polynomial as the product of irreducible polynomials.

•The function expresses an integer as the product of prime numbers.

Access: Algebra, …×or PALG or !ÞPOLY

382 Full Command and Function Reference