HP 48GII

Full Command and Function Reference 3-39
C→R
Type: Command
Description: Complex to Real Command: Separates the real and imaginary parts of a complex number or
complex array. The result in item 1/level 2 represents the real part of the complex argument.
The result in item 2/ level 1 represents the imaginary part of the complex argument.
Access: !°
TYPE LC→R ( °is the left-shift of the Nkey).
Input/Output:
Level 1/Argument 1 Level 2/Item 1 Level 1/Item 2
(x, y)
→
x y
[ C-array ]
→
[R-array ]
1
[R-array ]
2
See also: R→C, RE, IM
DARCY
Type: Function
Description: Darcy Friction Factor Function: Calculates the Darcy friction factor of certain fluid flows.
DARCY calculates the Fanning friction factor and multiplies it by 4. x
e/D
is the relative roughness
– the ratio of the conduit roughness to its diameter. y
Re
is the Reynolds number. The function
uses different computation routines for laminar flow (Re ≤ 2100) and turbulent flow (Re > 2100).
x
e/D
and y
Re
must be real numbers or unit objects that reduce to dimensionless numbers, and
both numbers must be greater than 0.
Access: …µ
DARCY
Input/Output:
Level 2/Argument 1 Level 1/Argument 2 Level 1/Item 1
x
e
/ D y
Re
→
x
Darcy
See also: FANNING
DATE
Type: Command
Description: Date Command: Returns the system date.
Access: …Ó
TOOLS DATE (Ó is the right-shift of the 9 key).
…&9
DATE
Flags: Date Format (-42)
Input/Output:
Level 1/Argument 1 Level 1/Item 1
→
date
See also: DATE+, DDAYS, TIME, TSTR
→DATE
Type: Command
Description: Set Date Command: Sets the system date to date.
date has the form MM.DDYYYY or DD.MMYYYY, depending on the state of flag –42. MM is
month, DD is day, and YYYY is year. If YYYY is not supplied, the current specification for the
year is used. The range of allowable dates is January 1, 2000 to December 31, 2090. Inputs
between January 1, 1991 and December 31, 1999 are silently rejected by →
DATE; no error is
reported and the system date is left unchanged.