DotNumerics - Initial-value problem for nonstiff and stiff ordinary differential equations ODEs - Сообщения
#21 Опубликовано: 01.08.2018 12:54:24
Russia ☭ forever, Viacheslav N. Mezentsev
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#22 Опубликовано: 01.08.2018 21:57:14
Simple test 2.
Works nice conventional/visual [6179].
That document, if it would come from other designer
would pass my QA [Quality Assurance].
Jean
DotNumerics.ode.test2.sm
#23 Опубликовано: 09.09.2018 14:23:36
It seems that all the dotnumeric ode solver functions fail to add the last step to the solution. In the given example, the exact solution is (approximately) met if the end value of x is increased by one step (x_end/steps).
The sheet is easily extended to whatever ode solvers by adding their name to the search list. The actually available solvers depend on what plugins are installed.
Section Math ODE precision.sm
The sheet is easily extended to whatever ode solvers by adding their name to the search list. The actually available solvers depend on what plugins are installed.
Section Math ODE precision.sm
Martin KraskaPre-configured portable distribution of SMath Studio: https://en.smath.info/wiki/SMath%20with%20Plugins.ashx
2 пользователям понравился этот пост
#24 Опубликовано: 10.09.2018 06:48:25
Updated for SS 0.99.6824. Intervals issue fixed.
Russia ☭ forever, Viacheslav N. Mezentsev
3 пользователям понравился этот пост
#25 Опубликовано: 06.12.2018 14:42:53
Updated.
Changes:
- zero point issue fixed;
- added support for the simple D(t,x) definition.
Changes:
- zero point issue fixed;
- added support for the simple D(t,x) definition.
Russia ☭ forever, Viacheslav N. Mezentsev
#26 Опубликовано: 24.12.2018 09:13:53
Updated.
dn.ode.kinetic1.sm
dn.ode.kinetic2.sm
dn.ode.kinetic3.sm
dn.ode.test1.sm
dn.ode.test2.sm
dn.ode.Amplitude detector.sm
dn.ode.kinetic1.pdf
dn.ode.kinetic2.pdf
dn.ode.kinetic3.pdf
dn.ode.test1.pdf
dn.ode.test2.pdf
dn.ode.Amplitude detector.pdf
dn.ode.kinetic1.sm
dn.ode.kinetic2.sm
dn.ode.kinetic3.sm
dn.ode.test1.sm
dn.ode.test2.sm
dn.ode.Amplitude detector.sm
dn.ode.kinetic1.pdf
dn.ode.kinetic2.pdf
dn.ode.kinetic3.pdf
dn.ode.test1.pdf
dn.ode.test2.pdf
dn.ode.Amplitude detector.pdf
Russia ☭ forever, Viacheslav N. Mezentsev
4 пользователям понравился этот пост
NDTM Amarasekera 24.12.2018 09:44:00, sergio 24.12.2018 11:04:00, frapuano 24.12.2018 14:23:00, Radovan Omorjan 24.12.2018 14:52:00
#27 Опубликовано: 25.12.2018 14:49:08
Native works as well.
You can try rkfixedSteven.
You can try rkfixedSteven.
#28 Опубликовано: 25.12.2018 16:25:11
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frapuano 25.12.2018 19:01:00
#29 Опубликовано: 09.12.2021 09:10:25
Plugin updated.
Changes:
- added support the mathematical form of the problem for ODE solvers;
- refactored.
Russia ☭ forever, Viacheslav N. Mezentsev
1 пользователям понравился этот пост
sergio 09.12.2021 11:40:00
#30 Опубликовано: 20.12.2021 16:18:13
Plugin updated.
Changes:
- solution restructured;
- converting the task for the ODE solver to the numerical form is now performed through the Mathcad Toolbox plugin (to avoid code duplication), so it must be installed;
- refactored.
Solvers that support mathematical notation now reuse code from the Mathcad Toolbox plugin. Now there is no need to recompile every such plugin.
Russia ☭ forever, Viacheslav N. Mezentsev
#31 Опубликовано: 21.08.2022 02:43:28
Hi Viacheslav. There are an issue with Implicit and dn_ExplicitRK45, just in the first element. Please see the attached.
dn_ExplicitRK45 issue.sm
Best regards.
Alvaro.
dn_ExplicitRK45 issue.sm
Best regards.
Alvaro.
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Вячеслав Мезенцев 22.08.2022 03:11:00
#32 Опубликовано: 22.08.2022 03:12:45
Plugin updated.
Changes:
- fixed values of initial conditions in the output array for dn_ImplicitRK5() and dn_ExplicitRK45().
Russia ☭ forever, Viacheslav N. Mezentsev
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