Reference Guide

Full Command and Function Reference 3-187
PX → C
Type: Command
Description: Pixel to Complex Command: Converts the specified pixel coordinates to user-unit coordinates.
The user-unit coordinates are derived from the (x
min
, y
min
) and (x
max
, y
max
) parameters in the
reserved variable PPAR. The coordinates correspond to the geometrical center of the pixel.
Access: !°L PICT L PX → C ( °is the left-shift of the Nkey).
Input/Output:
Level 1/Argument 1 Level 1/Item 1
{ #n #m }
→
(x,y)
See also: C→PX
→ Q
Type: Command
Description: To Quotient Command: Returns a rational form of the argument.
The rational result is a “best guess”, since there might be more than one rational expression
consistent with the argument. →Q finds a quotient of integers that agrees with the argument to
within the number of decimal places specified by the display format mode.
→Q also acts on numbers that are part of algebraic expressions or equations.
Access: „Ú REWRITE L→ Q (Ú is the left-shift of the 6key).
Flags: Number Display Format (–45 to –50)
Input/Output:
Level 1/Argument 1 Level 1/Item 1
x
→
'
a
/
b
'
(
x,y
)
→
'
a
/
b
+
c
/
d
*
i
'
'
symb
1
'
→
'
symb
2
'
Example: 'Y+2.5' →Q returns 'Y+5/2'
See also: →Qπ, /, XQ
→ Qπ
Type: Command
Description: To Quotient Times π Command: Returns a rational form of the argument, or a rational form of
the argument with π, square roots, natural logs, and exponentials factored out, whichever yields
the smaller denominator.
The rational result is a “best guess”, since there might be more than one rational expression
consistent with the argument. →Qπ finds a quotient of integers that agrees with the argument to
the number of decimal places specified by the display format mode.
→Qπ also acts on numbers that are part of algebraic expressions or equations.
For a complex argument, the real or imaginary part (or both) can have π as a factor.
Access: „Ú REWRITE L → Q π (Ú is the left-shift of the 6key).
Flags: Number Display Format (–45 to –50)