2 Pages<12 Go to Page...

DotNumerics - Initial-value problem for nonstiff and stiff ordinary differential equations ODEs Options  Email this topic  Watch this topic  Print this topic » Normal Threaded

Previous Topic Next Topic

uni		#21 Posted : 01 August 2018 18:54:24(UTC)
Rank: Advanced Member Groups: Registered, Advanced Member Joined: 10/11/2010(UTC) Posts: 1,469 Was thanked: 1256 time(s) in 731 post(s)		Simple test 2. DotNumerics.ode.test2.sm (22kb) downloaded 37 time(s). DotNumerics.ode.test2.pdf (80kb) downloaded 37 time(s).
		Russia ☭ forever Viacheslav N. Mezentsev
		BLOG Twitter
2 users thanked uni for this useful post.		on 02/08/2018(UTC),  on 02/08/2018(UTC)
User Profile View All Posts by User View Thanks

Jean Giraud		#22 Posted : 02 August 2018 03:57:14(UTC)
Rank: Guest Groups: Registered Joined: 04/07/2015(UTC) Posts: 6,795 Was thanked: 974 time(s) in 802 post(s)		Originally Posted by: uni 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 36 time(s).
User Profile View All Posts by User View Thanks

mkraska		#23 Posted : 09 September 2018 20:23:36(UTC)
Rank: Advanced Member Groups: Registered Joined: 15/04/2012(UTC) Posts: 1,938 Was thanked: 1097 time(s) in 700 post(s)		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 56 time(s).
		Martin Kraska Pre-configured portable distribution of SMath Studio: https://smath.com/wiki/SMath_with_Plugins.ashx
2 users thanked mkraska for this useful post.		on 09/09/2018(UTC),  on 10/09/2018(UTC)
User Profile View All Posts by User View Thanks

uni		#24 Posted : 10 September 2018 12:48:25(UTC)
Rank: Advanced Member Groups: Registered, Advanced Member Joined: 10/11/2010(UTC) Posts: 1,469 Was thanked: 1256 time(s) in 731 post(s)		Updated for SS 0.99.6824. Intervals issue fixed.
		Russia ☭ forever Viacheslav N. Mezentsev
		BLOG Twitter
3 users thanked uni for this useful post.		on 10/09/2018(UTC),  on 10/09/2018(UTC),  on 10/09/2018(UTC)
User Profile View All Posts by User View Thanks

uni		#25 Posted : 06 December 2018 20:42:53(UTC)
Rank: Advanced Member Groups: Registered, Advanced Member Joined: 10/11/2010(UTC) Posts: 1,469 Was thanked: 1256 time(s) in 731 post(s)		Updated. Changes: - zero point issue fixed; - added support for the simple D(t,x) definition.
		Russia ☭ forever Viacheslav N. Mezentsev
		BLOG Twitter
User Profile View All Posts by User View Thanks

uni		#26 Posted : 24 December 2018 15:13:53(UTC)
Rank: Advanced Member Groups: Registered, Advanced Member Joined: 10/11/2010(UTC) Posts: 1,469 Was thanked: 1256 time(s) in 731 post(s)		Updated. dn.ode.kinetic1.sm (9kb) downloaded 81 time(s). dn.ode.kinetic2.sm (13kb) downloaded 63 time(s). dn.ode.kinetic3.sm (13kb) downloaded 61 time(s). dn.ode.test1.sm (20kb) downloaded 68 time(s). dn.ode.test2.sm (19kb) downloaded 67 time(s). dn.ode.Amplitude detector.sm (21kb) downloaded 71 time(s). dn.ode.kinetic1.pdf (78kb) downloaded 68 time(s). dn.ode.kinetic2.pdf (94kb) downloaded 49 time(s). dn.ode.kinetic3.pdf (92kb) downloaded 46 time(s). dn.ode.test1.pdf (116kb) downloaded 46 time(s). dn.ode.test2.pdf (121kb) downloaded 46 time(s). dn.ode.Amplitude detector.pdf (149kb) downloaded 48 time(s). Edited by user 25 December 2018 02:59:43(UTC)  | Reason: Not specified
		Russia ☭ forever Viacheslav N. Mezentsev
		BLOG Twitter
4 users thanked uni for this useful post.		on 24/12/2018(UTC),  on 24/12/2018(UTC),  on 24/12/2018(UTC),  on 24/12/2018(UTC)
User Profile View All Posts by User View Thanks

Jean Giraud		#27 Posted : 25 December 2018 20:49:08(UTC)
Rank: Guest Groups: Registered Joined: 04/07/2015(UTC) Posts: 6,795 Was thanked: 974 time(s) in 802 post(s)		Native works as well. You can try rkfixedSteven.
User Profile View All Posts by User View Thanks

Jean Giraud		#28 Posted : 25 December 2018 22:25:11(UTC)
Rank: Guest Groups: Registered Joined: 04/07/2015(UTC) Posts: 6,795 Was thanked: 974 time(s) in 802 post(s)		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
1 user thanked Jean Giraud for this useful post.		on 26/12/2018(UTC)
User Profile View All Posts by User View Thanks

uni		#29 Posted : 09 December 2021 15:10:25(UTC)
Rank: Advanced Member Groups: Registered, Advanced Member Joined: 10/11/2010(UTC) Posts: 1,469 Was thanked: 1256 time(s) in 731 post(s)		Plugin updated. Changes: - added support the mathematical form of the problem for ODE solvers; - refactored.
		Russia ☭ forever Viacheslav N. Mezentsev
		BLOG Twitter
1 user thanked uni for this useful post.		on 09/12/2021(UTC)
User Profile View All Posts by User View Thanks

uni		#30 Posted : 20 December 2021 22:18:13(UTC)
Rank: Advanced Member Groups: Registered, Advanced Member Joined: 10/11/2010(UTC) Posts: 1,469 Was thanked: 1256 time(s) in 731 post(s)		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
		BLOG Twitter
User Profile View All Posts by User View Thanks

Razonar		#31 Posted : 21 August 2022 08:43:28(UTC)
Rank: Advanced Member Groups: Registered Joined: 28/08/2014(UTC) Posts: 1,319 Was thanked: 796 time(s) in 504 post(s)		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.
1 user thanked Razonar for this useful post.		on 22/08/2022(UTC)
User Profile View All Posts by User View Thanks

uni		#32 Posted : 22 August 2022 09:12:45(UTC)
Rank: Advanced Member Groups: Registered, Advanced Member Joined: 10/11/2010(UTC) Posts: 1,469 Was thanked: 1256 time(s) in 731 post(s)		Plugin updated. Changes: - fixed values of initial conditions in the output array for dn_ImplicitRK5() and dn_ExplicitRK45().
		Russia ☭ forever Viacheslav N. Mezentsev
		BLOG Twitter
2 users thanked uni for this useful post.		on 22/08/2022(UTC),  on 24/08/2022(UTC)
User Profile View All Posts by User View Thanks

Users browsing this topic

2 Pages<12 Go to Page...