HP 50g User's Reference Manual
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Brand: HP
Category: Calculator
Type: Advanced user's reference manual
Model: HP 48gII , HP 49g+ , HP 50G
Pages: 693
Full Command and Function Reference 3-241
Input/Output:
Level 1/Argument 1 Level 1/Item 1
obj
→
“obj”
Example: →STR can create special displays to label program output or provide prompts for input. The
sequence
"Result = " SWAP →STR + 1 DISP 1 FREEZE
displays
Result =
object in line 1 of the display, where object is a string form of an object taken
from level 1.
See also: →ARRY, →LIST, STR→, →TAG, →UNIT
STREAM
Type: Command
Description: Stream Execution Command: Moves the first two elements from the list onto the stack, and
executes obj. Then moves the next element (if any) onto the stack, and executes obj again using the
previous result and the new element. Repeats this until the list is exhausted, and returns the final
result.
STREAM is nominally designed for obj to be a program or command that requires two arguments
and returns one result.
Access: !°
LIST PROCEDURES STREAM
( °is the left-shift of the Nkey).
Input/Output:
Level 2/Argument 1 Level 1/Argument 2 Level 1/Item 1
{ list }
obj
→
result
Example 1:
{ 1 2 3 4 5 } « * » STREAM
returns 120.
Example 2:
« + » STREAM
is equivalent to ΣLIST.
See also: DOSUBS
STRM
Type: Command
Description: Starts the StreamSmart application.
Access: G
STREAMSMART
Input/Output: None
STURM
Type: Command
Description: For a polynomial
P
, STURM returns a list containing Sturm’s sequences of
P
and their
multiplicities
Access: Arithmetic, !Þ
POLYNOMIAL
!«
Input: A polynomial
P
Output: A list containing the Sturm’s sequences for
P
, and the multiplicity for each (as a real number).
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: Find the Sturm sequences and their multiplicities for the polynomial:
x
3
1
+
Command:
STURM(X^3+1)
Result:
{[1],-1.,[1],1.,[X^3+1,-(3*X^2),-1],1.}