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Differential Equations on HP Prime
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01152014 06:22 PM
I have the following differential equation: 3y 5y'=13
Subject to the initial condiction: y(0)=4
In the hp 50g, in RPN Mode, I create a vector with the expressions and the initial condition and invoke the desolve commnad, like this:
[ 3*y(x)  5*d/dx(y(x))=10 y(0)=4]
y(x)
desolve
That is enough to get the following solution:
13/3 1/3 e ^ (3/5 x)
The hp prime has a desolve command, but the documentation is so bad and scarse that is is almost impossible to figure out how to solve the problem above, with the initial conditions. I don't even know if it is possible.
Does anyone know how to do it ?
Is there better documentation available?
Please, don't reference the user guide. I already verified it.
Thanks
Re: Differential Equations on HP Prime
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01162014 06:05 AM
Ok.. I figured out how to put the expression and the initial condition in a vector. The rest is basically the same as in the HP50g. A better user guide is needed URGENT!
Re: Differential Equations on HP Prime
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03262015 08:33 PM
I would sure appreciate knowing how you did that. When I try using the 'solvedifferential equation' function for anything beyond a trivial DiffEQ I get garbage (probably the right answer buried in their somewhere, but it would be easier to do the calc by hand than try to decipher the gibberish).
Thanks in advance!
Re: Differential Equations on HP Prime
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03272015 08:32 AM
Did you look at the on calc help? Both examples show setting an initial condition and neither uses the optional vector input like you found.
As for the desovle solutions, the way it was explained to me was that it was generally transforming into parametric solutions which are (apparently) more useful according to the CAS author for lots of advanced stuff. I know he made some changes there so if/when there is another version on the Prime firmware it would contain those improvements too which I think will be much more to your liking.
TW
Although I work for the HP calculator group, the views and opinions I post here are my own.
Re: Differential Equations on HP Prime
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01312016 12:19 PM
Don't understand how to solve this differerntial equation on my HP Prime, Help please!
y'+2y=0 (0, 3)
Re: Differential Equations on HP Prime
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01312016 01:13 PM  edited 01312016 01:55 PM
Hi!, Magqva:
Welcome, to Forum !.
The guides and manual ... http://support.hp.com/usen/product/HPPrimeGraph
You can solve, with CAS and Shift Home Settings, complex (a,b) ...
Hope this helps, it has been useful, for the resolution, of their problem.
Kind Regards.
Maké.
Re: Differential Equations on HP Prime
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02012016 01:29 AM
Thank's Make,
Yes i have been there in the manual and tryed to figure out how to press the different buttons but could not make it work. Tryed a lot but so far only different error message.
Any suggestions?
Magnus
Re: Differential Equations on HP Prime
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02012016 06:44 AM
Hi!, Magqva:
See, the images ...
Hope this helps, it has been useful, for the resolution, of their problem.
Kind Regards.
Maké.
Re: Differential Equations on HP Prime
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02192016 01:36 AM
HI Maké, Is this a emulator ?,, for teachers are for anyone.I like this calulator ever since i seen it . I also have a friend on LSU, who was asking about how to write programs in this language is this C++14, did they move away from RP lisp.I have not read anythig on this calculator yet. Also Thanks for your advice about Jacob wall 's site I love cogolt. Anyway my friend is in Canada he is trying to write a survey program to inverse in the prime. He says he has no success but is this language simular to RP Lisp. at all. Because he told me it was simular. My wife use to write this code a few years back she does not think it is simular, but she has only wrote it on a pc. I know you will tell me where the best instructions are.I can write RP Lisp. but I never have written this C++. I think this Inverse program will not be long , Have you written any program like this. or tell me where i might get one. So i can tell him where to find it. I know there are apps. I can not remember where i seen them i will have to do search again.
Good talking to you, I will hope you read this
surveying101bil
Re: Differential Equations on HP Prime
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02192016 04:17 AM  edited 02192016 07:15 AM
Hi!, surveying101bil:
This emulator is for Android Operating System. I have a calculator and virtual emulator for PC's too. The Operating System of HP PRIME is similar to Pascal, but no sure, if, written in C++. The RPN, is similar to the HP 50 and previous series.
You can see many programs created for HP PRIME, in ... http://www.hpcalc.org/search.php?query=HP+PRIME
The HPPL (Hewlett Packard Programming Language) references ... http://en.hpprime.club
See, too, the video ...
Hope this helps, it has been useful, for the resolution, of their problem.
Kind Regards.
Maké.

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