Reference Guide

Full Command and Function Reference 3-265
UNROT
Type: RPL Command
Description: Changes the order of the first three objects on the stack. The order of the change is the opposite
to that of the ROT command.
Access: !° STACK UNROT ( °is the left-shift of the Nkey).
Input/Output:
L
3
L
2
L
1
L
3
L
2
L
1
obj
3
obj
2
obj
1
→
obj
1
obj
3
obj
2
Example: 333 22 1 UNROT returns 1 333 22 .
See also: OVER, PICK, ROLL, ROLLD, SWAP, ROT
UNTIL
Type: Command
Description: UNTIL Command: Starts the test clause in a DO … UNTIL … END indefinite loop structure.
See the DO entry for more information.
Access: !° BRANCH DO UNTIL ( °is the left-shift of the Nkey).
Input/Output: None
See also: DO, END
UPDIR
Type: Command
Description: Up Directory Command: Makes the parent of the current directory the new current directory.
UPDIR has no effect if the current directory is HOME.
Access: !§ ( §is the left-shift of the Jkey).
Input/Output: None
See also: CRDIR, HOME, PATH, PGDIR
UTPC
Type: Command
Description: Upper Chi-Square Distribution Command: Returns the probability utpc(n, x) that a chi-square
random variable is greater than x, where n is the number of degrees of freedom of the
distribution.
The defining equations are these:
• For x ≥ 0:
utpc n x,( )
1
2
n
2
---
Γ
n
2
---
( )
----------------
t
n
2
--- 1–
e
t
2
---
–
⋅ td
x
∞
∫
=
• For x < 0:
u
t
p
c
n
x
)
,
(
)
1
=
For any value z,
Γ
z
2
---
 
 
z
2
--- 1–
 
 
!=
, where ! is the factorial command.
The value n is rounded to the nearest integer and, when rounded, must be positive.
Access: !´ L PROBABILITY L UTPC ( ´ is the left-shift of the Pkey).