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:
X <> IND L 

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 X <> IND L 

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. X <> IND L 

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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