Beginner Questions

[Han]

What I meant was to take the programs you can find here on these forums (https://www.hpmuseum.org/forum/forum-15.html) and print them out for him to peruse. You can download both the emulator and connectivity kit freely should you run into programs which do not have their source code included as text files. Or you could also contact the authors directly for the source if you would rather not have to deal with tinkering with installing and learning two new software packages (emulator and connectivity kit).

[Carissa]

Ok yes - thanks. But I think I already did that. I'm always printing out codes if I find some that he was asking for or I copy and paste them and send them via eMail. But I doubt eMail is much better - that JP5 device they use in prison has a very small screen.

But he's quite happy at the moment with what you guys gave us so far.

Greets from Germany
Sabrina

[TI89]

I expect the result of 1t /1kg to 1000. But the HP Prime calculates 1 t/kg. Why?

[Joe Horn]

(05-14-2019 06:05 AM)TI89 Wrote:  I expect the result of 1t /1kg to 1000. But the HP Prime calculates 1 t/kg. Why?

Because you're doing it in CAS. You'll get the results you want if you do your unit work in Home.

[TI89]

(05-14-2019 05:55 PM)Joe Horn Wrote:  

(05-14-2019 06:05 AM)TI89 Wrote:  I expect the result of 1t /1kg to 1000. But the HP Prime calculates 1 t/kg. Why?

Because you're doing it in CAS. You'll get the results you want if you do your unit work in Home.

I do it in Home. If I calculate 1g/1kg then I get 0,001 but only in Home. It seems it works only if both nominater and denomitar has the same unit only other prefix.
The TI-nspire calculate 1tonne /1kg to 1000 (germany tonne).

[DrD]

CONVERT(1_(t),1_(kg)) ==> 1000_kg

[roadrunner]

If you do this:

USIMPLIFY((1_(t)/1_(kg)))

in home or cas, you get 1000. Is this what you are looking for?

-road

[TI89]

(05-14-2019 08:52 PM)roadrunner Wrote:  If you do this:

USIMPLIFY((1_(t)/1_(kg)))

in home or cas, you get 1000. Is this what you are looking for?

-road

Yes, this works for me. Thanks.

[leprechaun]

It seems that Eddie has put together pieces of his blog into that more comprehensive pdf "HP Prime Programming Tutorial - Firmware 13441" It can be found here: http://edspi31415.blogspot.com/2013/10/h...local.html
Are you aware of that one? Personally I did not find the time to study the content and I don't know if its only HPPL related or if it could help solving the mysteries when trying to have different parts of the prime's ecosystem interact. (which is, without complaining, mysterious and so so non-intuitive, if not disappointing, for me)

Have a look at that document.

Slainte

[Carissa]

Hey folks,

Michael has a new question that came up:

He saved an image but didn't give it a .png or .jpg ending. He saved it to AFiles. When he deleted it, the name of the image was still in the geometry app, there's a blank box saying "image not available". How can he delete this blank box?

Thanks in advance
Michael and Sabrina

[cyrille de brébisson]

Hello,

I am not sure I understand what happened there...

look in the plot settings of the geometrey app (apps, select geometry, shift plot) on the 2nd page. Is the image refereed to from there?

Cyrille

[Carissa]

Ok thanks - talking to him now. He just did what you said but it somehow disappeared - the picture is gone now.

Thank you! He'll come up with new questions soon.

[Carissa]

Hey friends, Michael has a new question - and he just loves to be in touch with the people here.

Is there a formula to represent the frequency of a light wave in RGBhex values? (Don't know if I spelled this right).

Greets
Michael and Sabrina

[DrD]

There is no formula for converting frequency to RGB. This is a rather complex subject, and is probably a good subject to research via a search engine, such as Google.

Here is a related discussion, from Mathworks:

https://www.mathworks.com/matlabcentral/...wavelength

-Dale-

[Carissa]

Ok thanks! I will google it!

[Carissa]

Hey fellows,

wasn't here for a while as we had some major phone trouble with the Nevada DOC.

But now Michael is back on the track and has a new question:

I need an example of how points data can be stored in a matrix for use in a line and/or triangle command.

I hope someone can help

Best regards
Carissa

[roadrunner]

You may have already figured this out, but:

CAS
M1:=[[7,11],[13,4],[4,3]]
triangle(point(M1(1)),point(M1(2)),point(M1(3)))

-road

[Carissa]

Thank you! Will send him a screenshot!

(07-22-2019 06:45 PM)roadrunner Wrote:  You may have already figured this out, but:

CAS
M1:=[[7,11],[13,4],[4,3]]
triangle(point(M1(1)),point(M1(2)),point(M1(3)))

-road

[Carissa]

Hey there,

long time no see!
Many things changed, Michael got transferred to a medium security prison.

He wants me to ask the following:

Where do I get a new OS for my HP Prime?

Greets
Sabrina and Michael

[Ioncubekh]

How should I comprehend the syntax of plotode() ...the 2nd example case