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Solution of equations (find the roots)
 Rank: Newbie
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Joined: 08/06/2009(UTC)
Posts: 7
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Every little progress with hard work behind-the-scenes 
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 Rank: Member Groups: Registered
Joined: 20/03/2009(UTC) Posts: 21  Location: Vienna, AUSTRIA
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First of all, again (and again!!) thanks for your work!
Omorr your posts and discussions are really very helpful, thanks for this too!
Regarding the plot and finding roots question, I had a similar problem, a few weeks ago, and solved it with a little function scaling.
So in this case just multiply the function with e.g. 1000 and there will be no problem of locating the roots in the plot. And since you scale just the y-axis the value of x won't change. It is really a simple way around.
Unforunatelly I haven't figured out how to post screens and the live version is not capable of ploting so I can just try to explain it this way.
@ smath:
I don't know if it is really a bug, but if I delete any variable (or text) in Smath Live Mode using the DEL Button a . (Dot) appears somewhere in the page. If I use the Backspace Button to delete it works like expected (so nothing is created).
I can reproduce this issue on Linux and Windows (both with Firefox-browser).
Thanks again!
Ciao Jakob
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  Rank: Administration Groups: Registered, Advanced Member Joined: 23/06/2009(UTC) Posts: 1,740  Was thanked: 318 time(s) in 268 post(s)
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jakobg wrote:
Regarding the plot and finding roots question, I had a similar problem, a few weeks ago, and solved it with a little function scaling.
So in this case just multiply the function with e.g. 1000 and there will be no problem of locating the roots in the plot. And since you scale just the y-axis the value of x won't change. It is really a simple way around.
Thanks again!
Ciao Jakob
You are very welcome Jakob, and thank you for the hint about scaling - simple but very useful  ! I hope that SMath will have the posibilitie in some subsequent version about separate axis scaling. Regards, Radovan P.S. @smath will need to explain to you how to put the images and other stuf here |
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!" |
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Rank: Newbie
Groups: Registered
Joined: 16/06/2009(UTC)
Posts: 5
Location: Italy
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Hi smath, just a little thank for new 0.82 Portable version. Now all "Xenocode" folder contents is saved into application folder...  For the empty registry key, I think there is nothing to do, but I noticed it just for the sake of completeness (and pedantry...). Also if you found other bugs (that I wish you to quickly fix), please consider fixed this one. Best Regards ZioZione
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 Rank: Administration Groups: Developers, Registered, Knovel Developers, Administrators, Advanced Member Joined: 11/07/2008(UTC) Posts: 1,616  Was thanked: 1978 time(s) in 666 post(s)
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ZioZione wrote:Hi smath, just a little thank for new 0.82 Portable version. Now all "Xenocode" folder contents is saved into application folder... For the empty registry key, I think there is nothing to do, but I noticed it just for the sake of completeness (and pedantry...). Also if you found other bugs (that I wish you to quickly fix), please consider fixed this one. Best Regards ZioZione Ok. But I want to mention, that real 0.82 release will be available in a couple of days. Links here was published to the Release Candidate only - it have some critical GUI bugs, that already fixed in newer internal build.
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Rank: Newbie
Groups: Registered
Joined: 16/06/2009(UTC)
Posts: 5
Location: Italy
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smath wrote:ZioZione wrote:Hi smath, just a little thank for new 0.82 Portable version. Now all "Xenocode" folder contents is saved into application folder... For the empty registry key, I think there is nothing to do, but I noticed it just for the sake of completeness (and pedantry...). Also if you found other bugs (that I wish you to quickly fix), please consider fixed this one. Best Regards ZioZione Ok. But I want to mention, that real 0.82 release will be available in a couple of days. Links here was published to the Release Candidate only - it have some critical GUI bugs, that already fixed in newer internal build. Hi smath, yes, of course, I won't intend to use it in a Production environment... In the meanwhile I just downloaded the latest release... Thank you again! Best Regards ZioZione P.S. If you want to collaborate with winPenPack for a TOTALLY PORTABLE (I mean, without the empty registry key) SMath, through X-Launcher (our universal launcher), you are, of course, welcome... We prefer to deal with Open Source only software, but if you agree with our license I don't think that will be any problem.
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Rank: Newbie
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Joined: 05/11/2011(UTC)
Posts: 3
Location: Hidden
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It seems to be very good tool for the students like me because of i am so weak in this subject and i want to use this algebra problem solver. but i want to know that it is useful in algebra or any other branch of mathematics. can i use this tool to solve quadratic equations?? please give me reply regarding algebra problem solver....
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Rank: Administration Groups: Registered, Advanced Member Joined: 23/06/2009(UTC) Posts: 1,740 Was thanked: 318 time(s) in 268 post(s)
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Hello, Yes, you can do lots of algebra things in SMath. Se the Tutorils page on thr Wiki, please. Regards, Radovan |
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!" |
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Rank: Newbie
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Joined: 26/11/2014(UTC)
Posts: 3
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Hi
Could you help me with this? I tried to solve this cubic equation
A=solve(x^3+A*x^2+B*x+C=0,x)
where A=5, B=4, C=0, the answer give me only two roots 5 and 0, instead of three. The right answer is -1, 0, 5.
Could you explain me what can I do or what is wrong?
Thanks
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  Rank: Advanced Member Groups: Registered, Advanced Member Joined: 13/01/2012(UTC) Posts: 2,654  Location: Italy Was thanked: 1340 time(s) in 879 post(s)
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No issues here File Attachment(s): Davide Carpi attached the following image(s): |
If you like my plugins consider to support SMath Studio buying a plan; to offer me a coffee: paypal.me/dcprojects |
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Rank: Newbie
Groups: Registered
Joined: 26/11/2014(UTC)
Posts: 3
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Thank-you Davide I downloaded the file, but something is wrong because, I only saw two roots  However with other values is ok  Regards, Robinson
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Rank: Advanced Member Groups: Registered, Advanced Member Joined: 13/01/2012(UTC) Posts: 2,654 Location: Italy Was thanked: 1340 time(s) in 879 post(s)
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I see... BTW also the cloud version gives 3 roots Yuo can try to check if something is different in the global settings (Tools > Options... > Calculation) Davide Carpi attached the following image(s): |
If you like my plugins consider to support SMath Studio buying a plan; to offer me a coffee: paypal.me/dcprojects |
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Rank: Newbie
Groups: Registered
Joined: 26/11/2014(UTC)
Posts: 3
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Now is working. I changed Roots (range).
Thank you for your help
Best Regards,
Robinson
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Joined: 04/07/2015(UTC) Posts: 6,866  Was thanked: 981 time(s) in 809 post(s)
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Smath Roots is underdesigned on several counts:
1. The unique Newton-Raphtson does not cope on horizontal/vertical runs of the function
Nothing you can do for two reasons:
1. Smath is very granualar compared to Mathcad 11, 2001i, 8 Pro.
2. Smath does not have TOL, CTOL
3. I figure Smath does not manage Roots because Maxima does not manage.
Suggestion: crack Mathcad 11 root code
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Rank: Guest
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Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)
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Here are your two plots c/w the roots shown on graph.
I have used the 'Solve Quick' in separate sheets not
to confuse solve[f(x),x] with the two differents
search range. Handling graphs are very easy, just a
matter of adjusting each direction [X,Y] separately.
Your solve with bracketed search range is perfect too !
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Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)
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Post again Jean Giraud attached the following image(s):
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Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)
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It wants some wording before attaching ... Jean Giraud attached the following image(s):
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Rank: Advanced Member Groups: Registered
Joined: 13/10/2010(UTC)
Posts: 172
Location: USA
Was thanked: 8 time(s) in 7 post(s)
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Hello,
How do you type the entries in the rho1 and rho2 entries in parentheseis?
Basile
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Rank: Guest
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Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)
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Collab, Your turmoil is solved. Always plot before you attempt more maths. Jean Giraud attached the following image(s):
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Rank: Guest
Groups: Registered
Joined: 04/07/2015(UTC) Posts: 6,866 Was thanked: 981 time(s) in 809 post(s)
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Is that so: 20559 viewed that image solution ?
True, sometimes 'solving' is a bit monkey business.
Read more: in the minute I will attach the Quaternion rotation in "Samples".
It gave me hard time, but works fine enough.
Nice forum "Powered by YAF.NET" ... unbelievable, it works on the click,
not like the dummy PTC Mathcad Community that I shared after Mathsoft Collaboratory.
Mathcad PTC comunity was not accessible or very slow every day between hours
22 and about 02 in the morning and dead during big sport competitions, elections ...
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