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)

v3.20.0

ModelingToolkit v3.20.0

Diff since v3.19.0

Merged pull requests:

• Handle conditionals and abs (#568) (@ChrisRackauckas)

v3.19.0

ModelingToolkit v3.19.0

Diff since v3.18.0

Merged pull requests:

• automatic equation reduction (#546) (@ChrisRackauckas)
• Do not inject getproperty when the module is Base and make simpler (#569) (@ChrisRackauckas)

v3.18.0

ModelingToolkit v3.18.0

Diff since v3.17.0

Closed issues:

• build_function is allocating for StaticArrays (#559)

Merged pull requests:

• CompatHelper: bump compat for "Latexify" to "0.14" (#561) (@github-actions[bot])
• Add ControlSystem for Nonlinear Optimal Control (#562) (@ChrisRackauckas)
• Direct compilation of C function from CTarget via GCC (#566) (@ChrisRackauckas)
• converting to C tutorial (#567) (@ChrisRackauckas)

v3.17.0

ModelingToolkit v3.17.0

Diff since v3.16.0

Closed issues:

• Simple derivative example fails (#545)
• New release? (#557)

Merged pull requests:

• Fix #545 (#548) (@shashi)
• CompatHelper: bump compat for "DataStructures" to "0.18" (#555) (@github-actions[bot])

v3.16.0

ModelingToolkit v3.16.0

Diff since v3.15.0

Closed issues:

• Add a function to extract all the variables used in an expression (#549)

Merged pull requests:

• Dict-based linearity (#550) (@shashi)