v5.25.1

ModelingToolkit v5.25.1

Diff since v5.25.0

Merged pull requests:

• SBMLToolkit downstream testing (#1130) (@anandijain)
• Check names in equality check between systems (#1135) (@YingboMa)

v5.25.0

ModelingToolkit v5.25.0

Diff since v5.24.0

Merged pull requests:

• getproperty for array variables (#1125) (@YingboMa)
• Enable usage of difference operator in ODESystem (#1126) (@sharanry)

v5.24.0

ModelingToolkit v5.24.0

Diff since v5.23.0

Merged pull requests:

• Use Difference operator for discrete system (#1119) (@sharanry)
• Downstream tests on StructuralIdentifiability (#1120) (@ChrisRackauckas)
• Fix export warning (#1121) (@YingboMa)
• Actually fix the import warning (#1124) (@YingboMa)
• adding defaults to ReactionSystem constructors (#1129) (@anandijain)

v5.23.0

ModelingToolkit v5.23.0

Diff since v5.22.0

Closed issues:

• Composition vs inheritance (#1052)
• macro + begin block (#1106)
• ODESystem with equations in symbolic matrix form throws hasmetadata error (#1109)
• Extending a nonlinear system with no iv (#1115)

Merged pull requests:

• Fix vars for array variables with dependent variables (#1104) (@YingboMa)
• Variable metadata docs (#1105) (@YingboMa)
• CompatHelper: bump compat for "JuliaFormatter" to "0.15" (#1107) (@github-actions[bot])
• Update test (#1108) (@YingboMa)
• Scalarize equations (#1110) (@YingboMa)
• Small note on ODAEProblem (#1113) (@YingboMa)
• Some usability improvements (#1114) (@YingboMa)
• add fix for extending a Nonlinear system with no independent variables (#1116) (@stonepreston)
• Update docs (#1118) (@YingboMa)

v5.22.0

ModelingToolkit v5.22.0

Diff since v5.21.0

Closed issues:

• Prevent ODEProblem construction when not providing parameters (#863)
• TypeError: non-boolean (Num) used in boolean context when accessing ODESolution generated saveat (#972)
• Independent variable of differential is ignored (#1065)
• Model Debugging: Return the unbalanced equations/variables (#1068)
• reparametrizing ODESystem independent variable (#1100)
• remake doesn't handle parameter Dicts gracefully (#1101)

Merged pull requests:

• Control parameter specification for AbstractODESystem, DiscreteSystem (#1059) (@cadojo)
• Assert that ODE derivatives are w.r.t. the independent variable (#1076) (@lamorton)
• Widen type bound on symscope to match symbolics (#1078) (@pepijndevos)
• Adding note about the independent variable restriction. (#1079) (@lamorton)
• Return Unbalanced Equations/Variables (#1086) (@bolognam)
• Variable scope: don't lose metadata by passing around bare symbols (#1092) (@pepijndevos)
• Add kwargs to modelingtoolkitize (#1093) (@dannys4)
• Namespacing change & default variable syntax (#1096) (@YingboMa)
• Fix second example in README.md (#1097) (@mayl)

v5.21.0

ModelingToolkit v5.21.0

Diff since v5.20.0

Closed issues:

• No method matching operation(::Sym{Real, Nothing}) error during index reduction (#998)
• KeyError running ODEProblem (#1056)
• 'Freezing' time by setting initial time value (#1063)
• Order of spring-mass-damper not lowered (#1066)

Merged pull requests:

• Fixes for symbolic arrays change (#989) (@shashi)
• CompatHelper: bump compat for "JuliaFormatter" to "0.14" (#1007) (@github-actions[bot])
• Ensure explicit time-dependence for all ODESystem variables (#1062) (@lamorton)
• Ensure independent variable is not in parameters (#1064) (@lamorton)
• Limit vertical height of individual states and parameters (#1067) (@bolognam)
• CompatHelper: bump compat for "SymbolicUtils" to "0.13" (#1072) (@github-actions[bot])

v5.20.0

ModelingToolkit v5.20.0

Diff since v5.19.1

Closed issues:

• Allow generic array types in modelingtoolkitize (#1009)
• inequality constraints? (#1048)
• Accessing and referring to ODESystem states (#1049)
• particle simulations; how to define forces which depend on several sub systems (#1050)
• ode_order_lowering does nothing (#1051)
• explicit handling of LabelledArrays (and NamedTuples?) (#1054)

Merged pull requests:

• Generalize modelingtoolkitize to handle LabelledArrays (#1055) (@ChrisRackauckas)

v5.19.1

ModelingToolkit v5.19.1

Diff since v5.19.0

Closed issues:

• Plotly plot is blank when plotting observed variable against another variable (#1038)
• Error when creating JumpProblem from a ReactionSystem with keyword arguments (#1042)

Merged pull requests:

• accept all kwargs to jumpsys (#1043) (@isaacsas)

v5.19.0

ModelingToolkit v5.19.0

Diff since v5.18.2

v5.18.2

ModelingToolkit v5.18.2

Diff since v5.18.1

Closed issues:

• Require systems kwarg to all system types' constructors to have unique names (#819)
• Nonlinear Problem sparse keyword error (#1027)
• Help needed ...How to use bareiss! function from MTK ? (#1029)
• Copy/Paste Bug in Exposing More Parallelism Documentation (#1032)

Merged pull requests:

• Cache nonlinear solve jacobians (#1030) (@ChrisRackauckas)
• Fix #1032 (#1033) (@YingboMa)
• Fix typo in runtests.jl message (#1034) (@lamorton)
• Add checks for unique subsystem names. Fixes #819. (#1035) (@lamorton)
• Compute Jacobian sparsity when u0 is not provided (#1036) (@YingboMa)