Search found 24 matches
- Thu Nov 30, 2023 1:55 am
- Forum: Discuss!
- Topic: My Two Wishes Swiss Micros - Everyone reply with yours?
- Replies: 36
- Views: 8568
Re: My Two Wishes Swiss Micros - Everyone reply with yours?
1. DM48 or DM50, ie a new platform with an additional row of keys compared to the DM32-41X-42, appropriate markings to avoid to put stickers, and a firmware written by Christophe de Dinechin. 2. DM71B with of course the ability to load plenty of modules. 3. DM15C with alphanumeric instructions inste...
- Sat Jun 10, 2023 3:46 pm
- Forum: Discuss!
- Topic: Trigonometric/transcendental function accuracy
- Replies: 80
- Views: 22083
Re: Trigonometric/transcendental function accuracy
Rational approximations seem to be commoner in my experience than polynomial ones. Indeed, I should have written: the best polynomial approximation is the minimax approximation. I don’t know which methods are used in common math libraries. But I highly doubt they use Taylor series, as the article p...
- Sat Jun 10, 2023 2:49 am
- Forum: Discuss!
- Topic: Trigonometric/transcendental function accuracy
- Replies: 80
- Views: 22083
Re: Trigonometric/transcendental function accuracy
This was posted on HackerNews last week, and I found this a similarly fascinating article: https://austinhenley.com/blog/cosine.html Taylor series are inefficient to approximate functions over an interval. The best method is to use a minimax approximation. Here is a simple introduction: https://www...
- Sun May 21, 2023 3:24 pm
- Forum: C47/C43, WP43, WP34S
- Topic: C47 Classic single shift, replaces C43 on DM42
- Replies: 797
- Views: 73253
Re: C47 Classic single shift, replaces C43 on DM42
Out of curiosity, what do you consider to be a "full doc"? I know Walter's manuals for the WP43 have been mentioned to you. Imo, they are a mammoth effort, but also quite a substantial read - the Owner's Manual alone is 351 pages and the Reference Manual is 322 pages (current versions on ...
- Sun May 21, 2023 3:13 pm
- Forum: C47/C43, WP43, WP34S
- Topic: C47 Classic single shift, replaces C43 on DM42
- Replies: 797
- Views: 73253
Re: C47 Classic single shift, replaces C43 on DM42
Those sheets are not redundant. They are accurately documenting every single function on the calculator in a minimal but effective way which you can predict. Just an example with the function LINPOL: I couldn’t find in the files how it works. I need more background. (Which is probably in the WP43 m...
- Sun May 21, 2023 3:08 pm
- Forum: C47/C43, WP43, WP34S
- Topic: C47 Classic single shift, replaces C43 on DM42
- Replies: 797
- Views: 73253
Re: C47 Classic single shift, replaces C43 on DM42
Thank you very much RjvM, Jaymos and H2X for your detailed responses. I hoped a user manual indeed, not a technical reference. My wording was inaccurate. I’ve no doubt that creating a complete manual is a huge task, and I know that Walter’s manuals are highly praised. I take note that I should begin...
- Sun May 21, 2023 2:20 am
- Forum: C47/C43, WP43, WP34S
- Topic: C47 Classic single shift, replaces C43 on DM42
- Replies: 797
- Views: 73253
Re: C47 Classic single shift, replaces C43 on DM42
Out of curiosity, I’ve downloaded the C47 files to have a look at the documentation, and I can say I’m greatly disconcerted. I can’t find any doc, only an overwhelming list of 219 redundant pdf files, each being a list of functions, without explanation on how to use them. It’s not what I call a docu...
- Fri Sep 23, 2022 10:13 pm
- Forum: Discuss!
- Topic: Collection of wishes for future SwissMicros products - discussion following Bob Prosperi's HHC 2022 talk
- Replies: 111
- Views: 16986
Re: Collection of wishes for future SwissMicros products - discussion following Bob Prosperi's HHC 2022 talk
71b, emu72, palmtops, Linux pocket computer: This would mean a new hardware platform. But everything mentioned in that heading could fit on the same hardware platform, and it might be very awesome. http://www.jeffcalc.hp41.eu/emu71/emu72.html This is exactly my wish! I would like a modern reincarna...
- Wed Jan 13, 2021 1:47 am
- Forum: Discuss!
- Topic: May 2021 Speculations
- Replies: 373
- Views: 107521
- Fri May 29, 2020 12:24 am
- Forum: DM42
- Topic: My DM42 Is lost
- Replies: 38
- Views: 18047
Re: My DM42 Is lost
And I received today my classic boards from teenix, after a 70 days trip from Australia. :? I ordered a HP-67 board from Teenix well before the pandemic restrictions, and the delay was already 24 days. Unfortunately, my board never worked correctly, and I had to return it to Australia. :( I don't e...