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Offline uni  
#21 Posted : 01 August 2018 18:54:24(UTC)
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Simple test 2.



DotNumerics.ode.test2.sm (22kb) downloaded 37 time(s).
DotNumerics.ode.test2.pdf (80kb) downloaded 37 time(s).
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Viacheslav N. Mezentsev
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Offline Jean Giraud  
#22 Posted : 02 August 2018 03:57:14(UTC)
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Originally Posted by: uni Go to Quoted Post
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 (25kb) downloaded 35 time(s).

Offline mkraska  
#23 Posted : 09 September 2018 20:23:36(UTC)
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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 (24kb) downloaded 54 time(s).
Section Math ODE precision.png
Martin Kraska

Pre-configured portable distribution of SMath Studio: https://en.smath.info/wi...th%20with%20Plugins.ashx
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Offline uni  
#24 Posted : 10 September 2018 12:48:25(UTC)
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Updated for SS 0.99.6824. Intervals issue fixed.
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Offline uni  
#25 Posted : 06 December 2018 20:42:53(UTC)
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Updated.

Changes:
- zero point issue fixed;
- added support for the simple D(t,x) definition.
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Offline uni  
#26 Posted : 24 December 2018 15:13:53(UTC)
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Updated.



dn.ode.kinetic1.sm (9kb) downloaded 78 time(s).
dn.ode.kinetic2.sm (13kb) downloaded 61 time(s).
dn.ode.kinetic3.sm (13kb) downloaded 59 time(s).
dn.ode.test1.sm (20kb) downloaded 66 time(s).
dn.ode.test2.sm (19kb) downloaded 66 time(s).
dn.ode.Amplitude detector.sm (21kb) downloaded 69 time(s).

dn.ode.kinetic1.pdf (78kb) downloaded 66 time(s).
dn.ode.kinetic2.pdf (94kb) downloaded 47 time(s).
dn.ode.kinetic3.pdf (92kb) downloaded 43 time(s).
dn.ode.test1.pdf (116kb) downloaded 43 time(s).
dn.ode.test2.pdf (121kb) downloaded 44 time(s).
dn.ode.Amplitude detector.pdf (149kb) downloaded 47 time(s).

Edited by user 25 December 2018 02:59:43(UTC)  | Reason: Not specified

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Viacheslav N. Mezentsev
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Offline Jean Giraud  
#27 Posted : 25 December 2018 20:49:08(UTC)
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Native works as well.
You can try rkfixedSteven.

rkNative.PNG

rkfixedSteven.PNG
Offline Jean Giraud  
#28 Posted : 25 December 2018 22:25:11(UTC)
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Read + interesting stuff.

Chemical Kinetics: Introduction with Mathcad/Maple/MCS. Chapter 3

Edited by moderator 26 December 2018 01:00:17(UTC)  | Reason: Not specified

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Offline uni  
#29 Posted : 09 December 2021 15:10:25(UTC)
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SMath Studio compatibility

Plugin updated.

Changes:

- added support the mathematical form of the problem for ODE solvers;
- refactored.
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Offline uni  
#30 Posted : 20 December 2021 22:18:13(UTC)
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SMath Studio compatibility

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
Offline Razonar  
#31 Posted : 21 August 2022 08:43:28(UTC)
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Hi Viacheslav. There are an issue with Implicit and dn_ExplicitRK45, just in the first element. Please see the attached.

dn_ExplicitRK45 issue.sm (9kb) downloaded 10 time(s).

Best regards.
Alvaro.
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Offline uni  
#32 Posted : 22 August 2022 09:12:45(UTC)
uni


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SMath Studio compatibility

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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