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Strange behavior solver app - V.20160829
09-01-2016, 05:07 PM
Post: #1
Strange behavior solver app - V.20160829
Good afternoon every one.

This afternoon my Hp prime updated correctly from the conkit.

The first thing I did, was check it had solved the problem with solve application.

Here the problem with the last firmware

http://www.hpmuseum.org/forum/thread-6487.html

I tried again with the example from the user manual,

EQ1: X-Y=-1
EQ2: (X^2)+(Y^2)=16

Now my solve aplication works, but the answer is not correct:

X=2
Y=28 388 218 142

In virtual calculator, now it doesn´t works.

In android, it works fine.

Please, can anyone check with the same equationes on your hp prime/virtual prime/android prime.

Thanks a lot.
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09-01-2016, 06:21 PM
Post: #2
RE: Strange behavior solver app - V.20160829
I got
X=2.28388
Y=3.28388

looks OK to me.

primer
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09-01-2016, 08:16 PM
Post: #3
RE: Strange behavior solver app - V.20160829
This is what I have:


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09-01-2016, 08:27 PM
Post: #4
RE: Strange behavior solver app - V.20160829
If you change to a non , decimal mark setting all will work correctly. That is the only workaround I can offer you in the meantime.

TW

Although I work for the HP calculator group, the views and opinions I post here are my own.
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09-01-2016, 08:47 PM
Post: #5
RE: Strange behavior solver app - V.20160829
(09-01-2016 08:27 PM)Tim Wessman Wrote:  If you change to a non , decimal mark setting all will work correctly. That is the only workaround I can offer you in the meantime.

Thanks for your answer Tim.

As you say I changed to a non decimal, and it works fine.
After that I returned again to decimal sistem, and now it works fine.

In any case, curious...
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09-02-2016, 02:38 PM
Post: #6
RE: Strange behavior solver app - V.20160829
Happened te same to me, but cound't fix it when I returned to the decimal symbol ",". Is there a bug with the decimal symbol ","?
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09-02-2016, 02:58 PM
Post: #7
RE: Strange behavior solver app - V.20160829
I would not expect it to be "fixed" by changing back. The problem has to do with parsing the results returned from the CAS fsolve command (in a string form). What you are seeing is the number being split at the , symbol incorrectly. The part after the , shows up as the Y value.

TW

Although I work for the HP calculator group, the views and opinions I post here are my own.
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09-02-2016, 10:01 PM
Post: #8
RE: Strange behavior solver app - V.20160829
Thanks for the reply. Do you have any idea if this bug will be fixed in a future update?
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09-07-2016, 09:07 AM
Post: #9
RE: Strange behavior solver app - V.20160829
Ohh I'm sorry. As Tim says, changing back does not improve.

It has been my newly diagnosed presbyopia certainly makes me confused sometimes between (.) y (,)

I apologize for any inconvenience this may have caused.
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09-19-2016, 09:49 AM
Post: #10
RE: Strange behavior solver app - V.20160829
The different digit grouping formats seem to be a constant source for trouble. Started with programming and is true for the very heart of the calculator. I struggled with that and I took it as given. Never came to the idea that number formatting could cause such funny results.
Annoying on the one hand, interessting on the other and definitely a feel good thing. Feel good in a way that makes you feel less idiotic when one modification in a larger software project is a reliable source for trouble.
I assume the dev team is much much more capable than I am and knowing the prime shows such annoying bugs aswell will help me through this work-week. Although interessting to see that they still did not find a solid integration of xcas into their code.
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