v5.13.1

ModelingToolkit v5.13.1

Diff since v5.13.0

Closed issues:

• @nAmed not defined when running the Copy-Paste Example from the documentation (#877)
• calling structural_simplify(sys) leads to InexactError: Int64(float) (#879)

Merged pull requests:

• fix docstring syntax highlighting (#878) (@anandijain)
• Fix linear equation finding (#880) (@YingboMa)

v5.13.0

ModelingToolkit v5.13.0

Diff since v5.12.1

Closed issues:

• How to avoid needing CSE? (#136)
• RFC: Domain symbolics (#175)
• Please add instructions on how to contribute (#187)
• Dulmage-Mendelson Decompositions (#188)
• Automated Model Learning and Construction (#189)
• Koopman decompositions (#194)
• Defining mixed stock flow models in ModelingToolkit (#196)
• Allow providing parameters to ODEProblem as a Dict (#311)
• Input/Output Functions (#362)
• Formulating and solving intertemporal optimization problems (#372)
• Callbacks don't update parameters in algebraic equations (#399)
• extra variables that are not states in ODESystem (#401)
• Support for initial conditions depending on parameters (#414)
• Harmonise parameter input praxis into Problems (#428)
• kappa language like specification of modular models? (#486)
• Compilation for CTarget outputs (#525)
• Support for piecewise functions (#531)
• Bug in creating an ODESystem from an array of equations (incorrect parsing of summation of terms) (#565)
• alias elimination of non-linear equations which only require linear solve (#579)
• Minimal cyclic dependent DAEs (#580)
• MT ODE solution very different from manual OrdinaryDiffEq (#585)
• build_function (CTarget) generates wrong code (#586)
• build_function needs vector of independent variables (#588)
• ODESystem does not accept matrix variables (#604)
• NonlinearProblem generation from NonlinearSystem errors (#711)
• Implicit ODE / DAE system (#721)
• Clarify relationship between pins, states and namespaces (#722)
• Open pins are not kept when combining systems (#723)
• Matrix-output functions for CTarget build_function calls (#735)
• CTarget, MATLABTarget, StanTarget Rewrite (#745)
• ode_order_lowering equation ordering (#782)
• Matrix differential equations (#797)
• Documentation revamping (#806)
• Use in ApproxFun (#822)
• Pirated functions with Symbolics.jl (#875)

Merged pull requests:

• start PDESystem documentation (#575) (@ChrisRackauckas)
• Handle mass matrix in modelingtoolkitize (#861) (@YingboMa)
• add paper tutorials and citation (#867) (@ChrisRackauckas)
• Add a bunch more documentation stuff (#873) (@ChrisRackauckas)
• Remove Num substitute overloads. (#876) (@YingboMa)

v5.12.1

ModelingToolkit v5.12.1

Diff since v5.12.0

Merged pull requests:

• fix master by namespacing derivative calls (#859) (@ChrisRackauckas)

v5.12.0

ModelingToolkit v5.12.0

Diff since v5.11.0

Merged pull requests:

• CompatHelper: bump compat for "SymbolicUtils" to "0.9" (#856) (@github-actions[bot])
• Minor fixes (#858) (@YingboMa)

v5.11.0

ModelingToolkit v5.11.0

Diff since v5.10.0

Closed issues:

• Use substitute() in convert(::Type{<:NonlinearSystem},rs::ReactionSystem) (#419)
• Ambiguous method error (#823)
• Serialization of ODEProblemExpr based models broke in 5.7 (#841)

Merged pull requests:

• Allow u0 and p defaults to refer to each other (#840) (@pepijndevos)
• Remove dead code (#844) (@YingboMa)
• connect -> connect_pins in the docs (#845) (@YingboMa)
• Some imports (#848) (@YingboMa)
• Fix variable name (#850) (@scheidan)
• Fix the error checking of calculate_massmatrix (#851) (@YingboMa)
• Removing build_function tests (#855) (@cadojo)
• Fix #841 (#857) (@mohamed82008)

v5.10.0

ModelingToolkit v5.10.0

Diff since v5.9.1

Merged pull requests:

• Use Symbolics (#825) (@YingboMa)
• Some minor improvements (#838) (@YingboMa)
• Fix ParameterizedFunctions.jl support with latest modelingtoolkitize … (#839) (@ChrisRackauckas)

v5.9.1

ModelingToolkit v5.9.1

Diff since v5.9.0

Closed issues:

• Images for documentation (#833)
• Calculating observed variables which are functions of algebraic variables fails (#834)

Merged pull requests:

• Remove Symbolics.jl from MTK docs (#827) (@ChrisRackauckas)
• Add acausal modeling tutorial (#835) (@ChrisRackauckas)
• add a bunch of tutorials (#836) (@ChrisRackauckas)
• Handle dependencies of observed variables properly (#837) (@YingboMa)

v5.9.0

ModelingToolkit v5.9.0

Diff since v5.8.0

Merged pull requests:

• Move StructuralTransformations to MTK (#830) (@YingboMa)

v5.8.0

ModelingToolkit v5.8.0

Diff since v5.7.0

Closed issues:

• Build observable functions (#815)

Merged pull requests:

• Populate the observed field in ODEFunction (#828) (@YingboMa)

v5.7.0

ModelingToolkit v5.7.0

Diff since v5.6.4

Closed issues:

• Variable order bug? (#172)
• Please add installation instructions (#182)
• Support more intense variable mappings (#297)
• broken macros when using import (#319)
• ModelingToolkit broken for SteadyStateProblems (#322)
• Document the parallel forms and targets better (#479)
• Expose Dagger scheduler options in DaggerForm (#483)
• Mixed derivatives (#520)
• Make EvalFunc hold world age and deprecate GeneralizedGenerated (#560)
• No method matching Expression(::Int) (#590)
• remove .op and .args (#633)
• Enhancement -- Full differentials and Delta (#635)
• Alias elimination can miss an equality? (#725)
• ERROR: DimensionMismatch when defining ODESystem separately from connected system (#808)
• @named macro to pass name from an assignment (#813)
• Rename / clarify that this is a CAS? (#821)

Merged pull requests:

• Add support for symbolic parameters (#777) (@pepijndevos)
• add single eq ODESystem constructor (#802) (@anandijain)
• Define inplace and out of place methods in ODEFunctionExpr (#804) (@mohamed82008)
• WIP: Alias elimination with singularity removal (#809) (@YingboMa)
• add isautonomous (#810) (@ChrisRackauckas)
• Require systems kwarg to ODESystem constructor to have unique names (#808) (#818) (@pbouffard)
• Add default parameter argument to the PDESystem (#820) (@ashutosh-b-b)
• Add @nAmed (#826) (@YingboMa)