v9.80.1

ModelingToolkit v9.80.1

Diff since v9.80.0

Merged pull requests:

• fix: fix solving out-of-place split = false ODEs (#3647) (@AayushSabharwal)

Closed issues:

• Passing Initials as parameters does not work consistently (#3645)
• Out of place split=false with static arrays regression on solve (#3646)

v9.80.0

ModelingToolkit v9.80.0

Diff since v9.79.1

Merged pull requests:

• feat: reduce reliance on metadata in structural_simplify (#3540) (@AayushSabharwal)
• fix: allow specifying type of buffers inside MTKParameters (#3585) (@AayushSabharwal)
• refactor: make @constants create tunable = false parameters (#3641) (@AayushSabharwal)

v9.79.1

ModelingToolkit v9.79.1

Diff since v9.79.0

Merged pull requests:

• feat: add unified System type (#3543) (@AayushSabharwal)
• test: consider StalledSuccess a failure in initialization test (#3639) (@AayushSabharwal)

Closed issues:

• check for Symbolics.VariableSource => :Parameter in isparameter (#3636)
• ERROR: MethodError: no method matching view(::MTKParameters) while solving an optimization problem via MOI (#3637)

v9.79.0

ModelingToolkit v9.79.0

Diff since v9.78.0

Merged pull requests:

• Fix Neuroblox downstream (#3590) (@ChrisRackauckas)
• Fix ImperativeAffect namespacing for arrays in non-root components (#3593) (@BenChung)
• feat: CasADiDynamicOptProblem (#3602) (@vyudu)
• feat: allow shifting array and scalarized variables (#3604) (@AayushSabharwal)
• docs: fix generate_control_function docs (#3607) (@AayushSabharwal)
• test: move jump control tests to Extensions test group (#3608) (@AayushSabharwal)
• fix: fix breaking change to generate_control_function (#3609) (@AayushSabharwal)
• fix: fix nested conditions in IfLifting (#3611) (@AayushSabharwal)
• feat: implement new callback semantics (#3614) (@AayushSabharwal)
• fix: use Diagonal for diagonal mass matrices (#3615) (@AayushSabharwal)
• refactor: add error message for wrapped variable in collect_var! (#3616) (@AayushSabharwal)
• feat: add CI for testing against released package versions (#3618) (@AayushSabharwal)
• fix change of var for sys with no equations (#3620) (@aml5600)
• Less restrictive promote_u0_p (#3624) (@devmotion)
• handle connections in change_independent_variable (#3625) (@aml5600)
• Change independent variable of ODEs with array variables (#3626) (@hersle)
• BVP tests are working fine (#3627) (@ErikQQY)

Closed issues:

• ShiftIndex does not work for array variables (#2843)
• ERROR: type SCCNonlinearProblem has no field kwargs (#3320)
• continuous_events can cause solver to get stuck at event crossing (#3327)
• Failed to precompile ModelingToolkit (#3594)
• Variables not found even though they definitely exist (#3612)
• Continious Callback does not work when condition is not properly written as a function of time (#3621)

v9.78.0

ModelingToolkit v9.78.0

Diff since v9.77.0

Merged pull requests:

• Add show method without MIME type for ODESystem (#3603) (@blegat)
• feat: use guesses as temporary values for variables solved by initialization (#3605) (@AayushSabharwal)
• build: bump minor version (#3606) (@AayushSabharwal)

v9.77.0

ModelingToolkit v9.77.0

Diff since v9.76.0

Merged pull requests:

• feat: create JuMPControlProblem for optimal control (#3549) (@vyudu)
• [v10] refactor: change inputs/outputs handling in structural_simplify (#3573) (@vyudu)
• Add Neuroblox downstream test (#3575) (@ChrisRackauckas)
• feat: add costs, constraints, coalesce to @mtkmodel, introduce At operator (#3584) (@vyudu)
• test: remove reliance on old examples/ models (#3592) (@AayushSabharwal)
• Change of Variables with units (#3595) (@aml5600)
• fix: allow solving initialization separately (#3599) (@AayushSabharwal)
• mark BVP tests as broken for now (#3600) (@vyudu)
• Update runtests.jl for bvproblem change (#3601) (@ChrisRackauckas)

Closed issues:

• Initial guesses for array-valued variables not being passed to NonlinearProblem (#3583)
• MTK@9.76 leads to more equations in the initialization problem vs 9.75 (#3588)
• Incorrect(?) dynamics of SDE systems in latest version (#3591)

v9.76.0

ModelingToolkit v9.76.0

Diff since v9.75.0

Merged pull requests:

• feat: lexicographically sort equations in structural_simplify (#3547) (@AayushSabharwal)
• fix: copy initials to u0 if u0 not provided to remake (#3572) (@AayushSabharwal)
• test: make clock test robust to equation ordering (#3587) (@AayushSabharwal)

Closed issues:

• setting Initials is ignorred when using BrownFullBasicInit (#3570)

v9.75.0

ModelingToolkit v9.75.0

Diff since v9.74.0

Merged pull requests:

• CompatHelper: bump compat for JuliaFormatter to 2, (keep existing compat) (#3128) (@github-actions[bot])
• fix: handle derivatives of time-dependent parameters (#3493) (@AayushSabharwal)
• fix: fix remake(::JumpProblem) (#3581) (@AayushSabharwal)

Closed issues:

• Code generation contains Differential when equations contain variable time parameter (#3480)
• remake no longer works for ODE-jump models (#3571)

v9.74.0

ModelingToolkit v9.74.0

Diff since v9.73.0

Merged pull requests:

• add tutorial on disturbance modeling for state estimation (#3494) (@baggepinnen)
• Add getter for observed variables (#3558) (@hersle)
• fix: make remake type-stable (#3566) (@AayushSabharwal)
• Copy MTKParameters fields only if not empty (#3579) (@DhairyaLGandhi)

Closed issues:

• Type-unstable ODESolution object (#3560)

v9.73.0

ModelingToolkit v9.73.0

Diff since v9.72.0

Merged pull requests:

• MTKModel: Provision to specify the type of System (#3526) (@ven-k)
• [v10] feat: make @named always wrap arguments in ParentScope (#3533) (@AayushSabharwal)
• feat: improve type-inference of remake_buffer in certain cases (#3546) (@AayushSabharwal)
• fix: fix assert_jac_length_header (#3556) (@AayushSabharwal)
• fix: fix values being promoted to Float64 in problem construction (#3561) (@AayushSabharwal)
• test: update reference tests (#3562) (@AayushSabharwal)
• refactor: remove DelayParentScope (#3564) (@AayushSabharwal)
• refactor: remove time_varying_as_func (#3565) (@AayushSabharwal)
• test: test @named always wrapping in ParentScope (#3567) (@AayushSabharwal)
• fix: scalarize Initial parameters for split = false systems (#3569) (@AayushSabharwal)
• build: bump minor version (#3574) (@AayushSabharwal)

Closed issues:

• @mtkmodel macro for discrete-time systems (#3498)
• DelayParentScope variables aren't properly handled (#3539)
• Float32 types are automatically converted to Float64 (#3553)
• Small numeric error introduced in sparse jacobians (#3554)
• ERROR: LoadError: AssertionError: r == 0 in InitializationProblem creation (#3559)
• Warnings on 1.12 prerelease (#3568)