RPN Question

10252017, 11:11 AM
(This post was last modified: 10252017 01:02 PM by Gamo.)
Post: #1




RPN Question
To divide x by 2
ENTER 2 ÷ What other keystokes will do the same that use only functions and No numbers except number to enter ? No (÷ x + ) Gamo  I got answer 

10252017, 12:10 PM
(This post was last modified: 10252017 12:12 PM by Paul Dale.)
Post: #2




RE: RPN Question
The WP 34S possibly has the shortest solution at two functions:
Code: yards>m More general is a statistical approach: Code: CLSigma Neither the arithmetic operators nor digits are required in either sequence. Pauli 

10252017, 12:29 PM
(This post was last modified: 10252017 12:30 PM by Gerson W. Barbosa.)
Post: #3




RE: RPN Question  
10252017, 12:43 PM
Post: #4




RE: RPN Question
My first thought was the  function but I then made a mistake trying it and moved on.
Pauli 

10252017, 01:05 PM
Post: #5




RE: RPN Question
(10252017 12:29 PM)Gerson W. Barbosa Wrote: Also, if losing T is not an issue: Am I wrong, or it is the Electronics Engineer in you that came up with that elegant answer? Jose Mesquita RadioMuseum.org member 

10252017, 01:10 PM
(This post was last modified: 10252017 01:16 PM by Didier Lachieze.)
Post: #6




RE: RPN Question
For small numbers (between 99 & 99) you can do: [10^x] [√x] [LOG]
You can extend the range to [230.25, 230.25] with: [e^x] [√x] [LN] 

10252017, 01:33 PM
Post: #7




RE: RPN Question
(10252017 01:05 PM)jebem Wrote:(10252017 12:29 PM)Gerson W. Barbosa Wrote: Also, if losing T is not an issue: Here is a funny example of different coding for the same problem, according to the authors’ professions: http://www.hpmuseum.org/cgisys/cgiwrap/...read=74095 (See link in message #3) BTW, my solution for that one was “3 XOR” (valid for the HP42S only). No, I am not logic circuit designer :) Gerson. 

10252017, 01:37 PM
Post: #8




RE: RPN Question  
10252017, 01:54 PM
Post: #9




RE: RPN Question
Didier is right my intended answer is [e^x] [√x] [LN]
Someone also suggest ENTER 50 % is very good idea. 

10252017, 02:21 PM
(This post was last modified: 10252017 03:23 PM by emece67.)
Post: #10




RE: RPN Question
(10252017 12:29 PM)Gerson W. Barbosa Wrote: This seems hardly beatable to me. Other approach still in the wp34s may be: Code: LB Also: Code: 1/x This last one keeps T intact, updates L in the right way, and also works with arguments <=0: Code: STO L Regards. César  Information must flow. 

10252017, 06:32 PM
Post: #11




RE: RPN Question
Solution for HP 41CX
Code:
Check out NQ41! 

10252017, 08:59 PM
Post: #12




RE: RPN Question
(10252017 12:10 PM)Paul Dale Wrote: The WP 34S possibly has the shortest solution at two functions: It could have the definitely shortest solution with one single function call if (if!) the HALF function proposed back then would have made it into the 34s firmware. ;) Yes, I still would appreciate such a function, and I think it would nicely complement STO+X or RCL+X for doubling X. Dieter 

10292017, 02:43 AM
Post: #13




RE: RPN Question
(10252017 02:21 PM)emece67 Wrote: Since the 41C doesn't have RCL+ Code: 1/x Check out NQ41! 

10292017, 07:44 AM
Post: #14




RE: RPN Question  
10292017, 09:42 PM
Post: #15




RE: RPN Question
(10292017 07:44 AM)Dieter Wrote: Note that this method may cause roundoff errors: 7 → 3,499999999. I believe we have found machine epsilon for the 41, 1x10^9. Since HP could have achieved a smaller epsilon if they had used binary vs. bcd format in the HP41, there must have been some other tradeoff or legacy design that led them to use BCD. Check out NQ41! 

10292017, 09:47 PM
Post: #16




RE: RPN Question
Ceci n'est pas une signature. 

10292017, 11:49 PM
Post: #17




RE: RPN Question
Bob Prosperi 

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