Page 1 of 1 [ 8 posts ] 

Stormyweathers
Tufted Titmouse
Tufted Titmouse

Joined: 20 Dec 2023
Age: 53
Gender: Male
Posts: 45
Location: Forney, TX

20 Dec 2023, 1:29 pm

Am I the only one who still misses Reverse Polish Notation on calculators?

It is, just as it always has been, vastly superior to the way normal calculators produce answers. The more complex the question, the more speed and accuracy RPN has to offer over the normal "2 + 2 X (7 - 3) =" variety.

If you have no idea what I am talking about, in RPN that is:
"2, Enter, 2, +, 7, Enter, 3, -, X"

The plastic on my poor Hewlett Packard 48g is finally wearing out, and I cannot find any replacements in the current market.

Am I the only one who weeps for the loss of this greatness, or are there any other RPN cultists about?



naturalplastic
Veteran
Veteran

User avatar

Joined: 26 Aug 2010
Age: 69
Gender: Male
Posts: 34,143
Location: temperate zone

20 Dec 2023, 1:55 pm

Never heard of it.

Is it "polish", as in "nail polish".

Or is it "Polish" as in "a citizen of the nation of Poland"?



Fnord
Veteran
Veteran

User avatar

Joined: 6 May 2008
Age: 67
Gender: Male
Posts: 59,887
Location: Stendec

20 Dec 2023, 6:18 pm

Yes, especially since my HP-41CV was stolen.

:(


_________________
 
No love for Hamas, Hezbollah, Iranian Leadership, Islamic Jihad, other Islamic terrorist groups, OR their supporters and sympathizers.


BTDT
Veteran
Veteran

User avatar

Joined: 26 Jul 2010
Age: 60
Gender: Female
Posts: 7,123

20 Dec 2023, 6:57 pm

I have a limited edition HP15C next to my computer mouse. I should have bought a spare one.



steve30
Deinonychus
Deinonychus

User avatar

Joined: 16 Feb 2007
Age: 32
Gender: Male
Posts: 391
Location: Rotherham

21 Dec 2023, 12:00 pm

naturalplastic wrote:
Never heard of it.

Is it "polish", as in "nail polish".

Or is it "Polish" as in "a citizen of the nation of Poland"?


Polish as in Poland. I believe the name came about because Polish Notation was invented by a Polish Bloke, then Hewlett Packard flipped it around to make Reverse Polish Notation.

I've had an HP35s calculator since 2009. I really like it. It also does algebraic notation if you prefer that. I often do simple calculations on my desktop computer though, for which I use 'xcalc -rpn'.

I found it very easy to get used to and I struggle to go back to algebraic on calculators a lot of the time.



Fenn
Veteran
Veteran

User avatar

Joined: 1 Sep 2014
Gender: Male
Posts: 2,468
Location: Pennsylvania

21 Dec 2023, 2:30 pm

You can get calculator apps for iPhone now, but the better ones cost money. I bought one called PCalc because I got sick of the lame calculator apps Apple provides. It can do RPN. You can write your own functions in RPN, or non-RPN.
I like it. If you have an iPhone or iPad you can search for PCalc and/or rpn in the App Store.

I an sure there is something similar for android. For mac or Windows or linux I guess you could look for apps or use an android emulator:

https://www.instructables.com/Creating- ... _page=true


_________________
ADHD-I(diagnosed) ASD-HF(diagnosed)
RDOS scores - Aspie score 131/200 - neurotypical score 69/200 - very likely Aspie


Cornflake
Administrator
Administrator

User avatar

Joined: 30 Oct 2010
Gender: Male
Posts: 65,715
Location: Over there

22 Dec 2023, 12:48 pm

Or do it in Forth -

3 4 5 * + . 23 ok
3 4 + 5 * . 35 ok

: squared dup * ;
: cubed dup squared * ;
: forth-power squared squared ;

4 squared . 16 ok
4 cubed . 64 ok
4 squared cubed . 4096 ok
4 forth-power . 256 ok

Eeh, it's been a while since I went anywhere near this... :lol:


_________________
Giraffe: a ruminant with a view.


Fenn
Veteran
Veteran

User avatar

Joined: 1 Sep 2014
Gender: Male
Posts: 2,468
Location: Pennsylvania

23 Jan 2024, 9:05 am

There is a version of Forth that runs on the Lego RCX (Lego’s first robot kit in the Mindstorms line).

So if you are a Lego Fan and miss RPN

github - pbForth

Wikipedia - Lego Mindstorms

Bricklink.com - Robotics Invention System, Version 1.0 - Item No: 9719


_________________
ADHD-I(diagnosed) ASD-HF(diagnosed)
RDOS scores - Aspie score 131/200 - neurotypical score 69/200 - very likely Aspie