Mathcad Toolbox - Contains analogs of functions from Mathcad - Сообщения
#81 Опубликовано: 06.12.2018 05:36:46
Updated. Now you can also use simple form for D() function definition.
Russia ☭ forever, Viacheslav N. Mezentsev
4 пользователям понравился этот пост
Radovan Omorjan 06.12.2018 09:33:00, sergio 06.12.2018 06:45:00, frapuano 06.12.2018 06:58:00, Alvaro Diaz Falconi 06.12.2018 10:09:00
#82 Опубликовано: 06.12.2018 06:01:27
But x in D(t,x) is vector.
Russia ☭ forever, Viacheslav N. Mezentsev
#83 Опубликовано: 24.12.2018 05:33:39
Updated.
Now x in simple D(t,x) definition must be a scalar.
iode.examples.sm
iode.kinetic1.sm
iode.kinetic2.sm
iode.kinetic3.sm
iode.integrate.sm
iode.test1.sm
iode.test2.sm
iode.Amplitude detector.sm
iode.examples.pdf
iode.kinetic1.pdf
iode.kinetic2.pdf
iode.kinetic3.pdf
iode.integrate.pdf
iode.test1.pdf
iode.test2.pdf
iode.Amplitude detector.pdf
Now x in simple D(t,x) definition must be a scalar.
iode.examples.sm
iode.kinetic1.sm
iode.kinetic2.sm
iode.kinetic3.sm
iode.integrate.sm
iode.test1.sm
iode.test2.sm
iode.Amplitude detector.sm
iode.examples.pdf
iode.kinetic1.pdf
iode.kinetic2.pdf
iode.kinetic3.pdf
iode.integrate.pdf
iode.test1.pdf
iode.test2.pdf
iode.Amplitude detector.pdf
Russia ☭ forever, Viacheslav N. Mezentsev
4 пользователям понравился этот пост
NDTM Amarasekera 24.12.2018 09:43:00, frapuano 24.12.2018 14:23:00, Radovan Omorjan 24.12.2018 14:51:00, sergio 24.12.2018 06:25:00
#84 Опубликовано: 16.01.2019 06:05:17
Updated. Rkadapt() fixed.
Russia ☭ forever, Viacheslav N. Mezentsev
3 пользователям понравился этот пост
#85 Опубликовано: 31.01.2019 17:43:52
Updated ( >= SMath Studio 0.99.6970).
Changes:
- divided into two plugins (the second one is Intel ODE Solver Library);
- version changed (0.2.x.x);
- refactored.
Changes:
- divided into two plugins (the second one is Intel ODE Solver Library);
- version changed (0.2.x.x);
- refactored.
Russia ☭ forever, Viacheslav N. Mezentsev
#86 Опубликовано: 11.02.2019 09:36:21
Some news.
It's hard but I want to realize a general solution for some types of tasks. Specially for this I need more powerful symbolic engine inside SMath. Therefore I made symcs project. I hope that we can use this solution in other similar cases.
That's why I split the plugin.
It's hard but I want to realize a general solution for some types of tasks. Specially for this I need more powerful symbolic engine inside SMath. Therefore I made symcs project. I hope that we can use this solution in other similar cases.
That's why I split the plugin.
Russia ☭ forever, Viacheslav N. Mezentsev
2 пользователям понравился этот пост
#87 Опубликовано: 11.02.2019 11:01:58
325 сообщений из 2 052 понравились и 1 не понравились пользователям.
Группа: Moderator
I think that most of the Mathcad users know what you intend to do and I really appreciate that 
Regards,
Radovan
Regards,
Radovan
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!"
#88 Опубликовано: 11.02.2019 15:52:40
I think that most of the Mathcad users know what you intend to do and I really appreciate that
Viacheslav is an ancient Mathsoft visitor.
I still have a document from Him ... 2D Implicit plot.
Is possible to code 1/1 Mathcad Given/ODEsolve ?
#89 Опубликовано: 11.02.2019 16:35:16
No, Jean, 1/1 - not possible. Now they have two different realisations: MC11-MC15 and Prime. But I can do something similar. Plugin can implicity collect information about available ode solvers and you can choose them in the context menu.
Russia ☭ forever, Viacheslav N. Mezentsev
1 пользователям понравился этот пост
frapuano 12.02.2019 06:00:00
#90 Опубликовано: 11.02.2019 16:52:19
No, Jean, 1/1 - not possible. Now they have two different realisations: MC11-MC15 and Prime. But I can do something similar. Plugin can implicity collect information about available ode solvers and you can choose them in the context menu.
I can see you "busy" ! Gorgeous context menu.
What is that Smath Community doing: Building Cathedrals/Pyramids ?
You mean: Mathcad Prime "cluster fuck" in US appreciation from Collab.
#91 Опубликовано: 11.07.2021 00:23:42
Some news.
It's hard but I want to realize a general solution for some types of tasks. Specially for this I need more powerful symbolic engine inside SMath. Therefore I made symcs project. I hope that we can use this solution in other similar cases.
Hi uni. It is possible to enable a clone of that component for return only the expressions inside? For example, the set of the equations
Also, it is possible too to add the option for mark with a round box the area?
Best regards.
Alvaro.
#92 Опубликовано: 11.07.2021 01:20:49
Yes, it is possible.
Russia ☭ forever, Viacheslav N. Mezentsev
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Alvaro Diaz Falconi 11.07.2021 02:41:00
#93 Опубликовано: 26.11.2021 00:11:56
Coming soon, but for now as an experiment.
Russia ☭ forever, Viacheslav N. Mezentsev
2 пользователям понравился этот пост
#94 Опубликовано: 28.11.2021 15:47:31
I have verified that linear interpolation is used, which is described in the manual.
I changed the interpolation method to linear and also changed the notation of the derivative by analogy ( "`" ).
I changed the interpolation method to linear and also changed the notation of the derivative by analogy ( "`" ).
Russia ☭ forever, Viacheslav N. Mezentsev
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Davide Carpi 29.11.2021 06:40:00
#95 Опубликовано: 28.11.2021 16:42:18
Russia ☭ forever, Viacheslav N. Mezentsev
#96 Опубликовано: 28.11.2021 18:49:59
I was wrong. Linear interpolation and linear spline interpolation are different things. I will try to find the formulas that are used in these functions.
Russia ☭ forever, Viacheslav N. Mezentsev
#97 Опубликовано: 29.11.2021 02:43:07
A simple test that shows the interpolation method used by the ODE solver. Obviously, the lspline() function is used.
Odesolve() with rkfixed method (Mathcad 15).
Odesolve interpolation test.mcd.zip
The same for Mathcad Prime 7.0 (Adams method used).
Odesolve() with rkfixed method (Mathcad 15).
Odesolve interpolation test.mcd.zip
The same for Mathcad Prime 7.0 (Adams method used).
Russia ☭ forever, Viacheslav N. Mezentsev
1 пользователям понравился этот пост
Davide Carpi 29.11.2021 06:40:00
#98 Опубликовано: 29.11.2021 20:31:00
Ok, I found a bug in rkfixed() and finally figured out the difference between interpolation functions. In the picture below, I repeated part of the calculations from Mathcad. As you can see, to interpolate the numerical solution of the ODE, a cubic spline is used, linear at the end points.
Bugs will be fixed when the build server starts working.
Links:
1. Cubic spline
2. Cubic Spline Interpolation
Cubic spline interpolation using Mathcad (2009).pdf
Bugs will be fixed when the build server starts working.
Links:
1. Cubic spline
2. Cubic Spline Interpolation
Cubic spline interpolation using Mathcad (2009).pdf
Russia ☭ forever, Viacheslav N. Mezentsev
#99 Опубликовано: 29.11.2021 21:30:48
Ok, I found a bug in rkfixed() and finally figured out the difference between interpolation functions. In the picture below, I repeated part of the calculations from Mathcad. As you can see, to interpolate the numerical solution of the ODE, a cubic spline is used, linear at the end points.
Thanks Viacheslav ... superb demo.
BTW, I was wrong ODEsolve is lspline MCD 11.
Years ago, Tom G. had exposed the different deficiencies
wrt to each l_p_c cubic spline ... Matlab as well.
So, your next headache is to figure the best solver from
the huge Smath library [17], Mathcad stiff is Radau MCD 2001i, 11.
Cheers ... Jean.
#100 Опубликовано: 30.11.2021 01:28:14
BTW, I was wrong ODEsolve is lspline MCD 11.
This day should be accepted as a milestone. We have to celebrate this day annually.
There should be carnivals, fireworks should enlighten the night.
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