v4.0.7

ModelingToolkit v4.0.7

Diff since v4.0.6

Closed issues:

• Unused parameter raises ArgumentError (#364)
• unable to update ModelingToolkit to a newer version (v4.0 +) due to conflict with other SciML package (#661)
• multiple argument function build error (#662)
• Doc string for Variable needs updating for v4 (#667)

Merged pull requests:

• CompatHelper: bump compat for "SpecialFunctions" to "1.0" (#655) (@github-actions[bot])
• Macro-free docs extra parens removed (#658) (@anandijain)
• Switch to GitHub action (#660) (@YingboMa)
• Wrap registered fn output in Num if any input is Num (#663) (@shashi)
• Update CompatHelper and StaticArrays bounds (#665) (@YingboMa)
• Update Variable doc string (#668) (@YingboMa)
• Remove rename from exports (#671) (@ChrisRackauckas)

v4.0.6

ModelingToolkit v4.0.6

Diff since v4.0.5

Closed issues:

• logorithms not differentiated (#641)
• Unable to do derivative of fractions with symbols (#654)
• build_function errors with type Int64 has no field value (#659)

Merged pull requests:

• fix build function for y^-1 (#656) (@shashi)

v4.0.5

ModelingToolkit v4.0.5

Diff since v4.0.4

Merged pull requests:

• Fix sym_lu (#651) (@YingboMa)

v4.0.4

ModelingToolkit v4.0.4

Diff since v4.0.3

Closed issues:

• readme example not working (#608)
• "Automated sparse parallelism of ODE's" example failing (#647)

Merged pull requests:

• A nicer error message (#649) (@contradict)
• fix modelingtoolkitize dispatching (#650) (@ChrisRackauckas)

v4.0.3

ModelingToolkit v4.0.3

Diff since v4.0.2

Closed issues:

• Variable names incorrect in plot legends on 4.0+ (#636)
• ODEProblem construction crashing when converted from ReactionSystem (#637)

Merged pull requests:

• Fix names in plot legends (#646) (@isaacsas)
• fix symbol replacement in build_function (#648) (@shashi)

v4.0.2

ModelingToolkit v4.0.2

Diff since v4.0.1

Closed issues:

• Differential & expand_derivatives missing derivatives of linear terms (#624)
• Help needed with evaluating oderatelaws() using build_function() (#634)

Merged pull requests:

• MassInstallAction: Install the TagBot workflow on this repository (#640) (@christopher-dG)
• fix build_function when args are terms e.g. x(t) (#643) (@shashi)

v4.0.1

ModelingToolkit v4.0.1

Diff since v4.0.0

Merged pull requests:

• Fix a case in expand_derivatives (#627) (@shashi)
• Updates for Catalyst (#628) (@shashi)
• fix latexify (#629) (@shashi)

v4.0.0

ModelingToolkit v4.0.0

Diff since v3.21.0

Closed issues:

• Operation vs Variable (#433)
• Slowdown (and possible memory leak?) when solving SDEs using MTK (#573)
• World Age Problem when solving JumpSystem from function (#577)
• Error on precompilation (#601)
• composed SDESystems (#602)
• Unexpected behaviour of build_function on constant expressions (#616)

Merged pull requests:

• WIP: Unify the Term definition between MTK and SymbolicUtils (#518) (@YingboMa)
• replace GenearlizedGenerated with RuntimeGeneratedFunctions (#595) (@ChrisRackauckas)
• exprs_occur_in (#613) (@shashi)
• make states_to_sym fast in checking membership (#617) (@shashi)
• More serious Symbol and makesym (#618) (@YingboMa)
• Small doc fixup (#623) (@dangirsh)
• Restructure and make Symbol composable (#625) (@YingboMa)

v3.21.0

ModelingToolkit v3.21.0

Diff since v3.20.1

Closed issues:

• ControlSystem with parameters (#594)

Merged pull requests:

• fix parameter usage (#598) (@ChrisRackauckas)
• Add GalacticOptim-compatible OptimizationProblem generation (#599) (@ChrisRackauckas)
• fix nested hierarchy (#600) (@ChrisRackauckas)

v3.20.1

ModelingToolkit v3.20.1

Diff since v3.20.0

Closed issues:

• Build function allocating on large expressions? (#551)
• flatten could work in this case, but does not (#578)
• eval(build_function): invalid named tuple field name "derivative(qˍt(t), t)" (#584)

Merged pull requests:

• unflatten long operations in build_function (#581) (@shashi)
• fix #578 (#582) (@shashi)
• More modelingtoolkitize tests and fix mtkitize with tuples (#596) (@ChrisRackauckas)