Search found 25 matches

by richmit
Sun May 16, 2021 4:18 am
Forum: Usage tips, tricks and problem reports
Topic: The unused top function key
Replies: 24
Views: 5032

Re: The unused top function key

Peet - how many keystrokes you need to start your “reset all“ program? I assume 4: shift-catalog-pgm-myreset (I‘m not DM42 power-programming user, so, still not sure if I correctly understand your use case). Or just press XEQ, which brings up the PGM catalog as well. If you keep the "reset all...
by richmit
Fri May 14, 2021 3:11 am
Forum: Software Library
Topic: Propagation of Uncertainty Calculations
Replies: 4
Views: 1120

Re: Propagation of Uncertainty Calculations

I'd suggest adding is a PDF copy of the full contents of each document That's a great idea! Turns out it is harder than I expected to make nice PDFs with org-mode -- it's easy to make super ugly ones! After a bit of trial and error, I have PDFs that I'm not ashamed of. I'm not completely satisfied ...
by richmit
Tue May 11, 2021 2:31 am
Forum: Software Library
Topic: Propagation of Uncertainty Calculations
Replies: 4
Views: 1120

Propagation of Uncertainty Calculations

Greetings; I normally do propagation of uncertainty calculations with Maple; however, I recently found myself at the lab bench while the bench computer was busy with an experiment and my laptop was doing an upgrade. So I coded up a couple computations I needed. Turns out this stuff is handy to have ...
by richmit
Thu Apr 29, 2021 3:27 am
Forum: Software Library
Topic: My 42s software collection update
Replies: 7
Views: 1479

Re: My 42s software collection update

whuyse wrote:
Wed Apr 28, 2021 9:05 am
Why not, after DIM "_M": (to n x n+1)
This is something I need to work on in general. I grew up on the 48 series, and the 4 level stack is still a little weird to me. ;)

That said, I'm finding free42 programming to be a lot of fun!
by richmit
Tue Apr 27, 2021 8:06 pm
Forum: Software Library
Topic: My 42s software collection update
Replies: 7
Views: 1479

Re: My 42s software collection update

What is the - for on line 17? Can I use this code or is it copyrighted? The ‘-‘ is to drop the stack so that the original y and z are preserved. Feel free to use it, of course! Thank you! Now that I have FUNC, I don't think as much about the stack anymore. BTW, a similar trick allows us to compute ...
by richmit
Tue Apr 27, 2021 5:58 pm
Forum: Software Library
Topic: My 42s software collection update
Replies: 7
Views: 1479

Re: My 42s software collection update

whuyse wrote:
Tue Apr 27, 2021 2:16 pm
To create an identity matrix, and a diagonal matrix from a vector without looping or matrix access...
OMG. I just spent the last 10min staring at this little miracle. That's fantastically clever!

What is the - for on line 17?

Can I use this code or is it copyrighted?
by richmit
Mon Apr 26, 2021 4:31 am
Forum: Software Library
Topic: My 42s software collection update
Replies: 7
Views: 1479

My 42s software collection update

I have updated my collection of 42s programs. Reworked everything for free42 3.0.2 Refactored the code to use 10x less RAM. Probably introduced some bugs :( Polynomial roots. Still a couple todo items on this one -- let's call it a beta. Find matrix characteristic polynomial The previous two allow y...
by richmit
Sat Apr 10, 2021 6:55 pm
Forum: Software Library
Topic: Function Plots
Replies: 0
Views: 1592

Function Plots

Greetings; I found some time today, and completed my function plotting program -- or at least a beta version. ;) Some features: Designed for high resolution mode of DM42 Can do dots or connected graphs Interactive zoom-box Optional autoscale of y-axis Pretty good control over axis and grid line draw...
by richmit
Sun Apr 04, 2021 2:53 am
Forum: Usage tips, tricks and problem reports
Topic: "Required action: Run Disk Format"
Replies: 1
Views: 828

Re: "Required action: Run Disk Format"

This just happened to me! This is what I did:

Goto "SETUP".
Select "5. System".
Select "2. Enter System Menu".
Select "5. Format FAT Disk".
Select "2. Format FAT Disk"
by richmit
Sat Apr 03, 2021 8:07 pm
Forum: Software Library
Topic: Sums, Products, & Function Tables
Replies: 0
Views: 1538

Sums, Products, & Function Tables

So I was inspired by the new PGMMENU function. Eventually I want a better function plotter, but first I decided to implement sums, products, and function tables. It works a lot like the built in INTEG function. For tables, the result is a matrix. If the function returns multiple values, then they ar...