v8.47.0

ModelingToolkit v8.47.0

Diff since v8.46.1

Closed issues:

• Replacing parameters with expressions (#2037)
• Setting variable scope unwraps Num (#2072)

Merged pull requests:

• Unityper update (#2020) (@YingboMa)
• update docs/Project.toml (#2075) (@YingboMa)
• Add GUIMetadata (#2078) (@YingboMa)
• Rewrap after unwrap in apply_to_variables (#2079) (@YingboMa)

v8.46.1

ModelingToolkit v8.46.1

Diff since v8.46.0

Closed issues:

• Finish pieces around DiscreteSystem (docs, DiscreteFunction, DiscreteProblemExpr) (#993)
• Simple model apparently runs out of memory (#2053)
• Incorrect Jacobian size with jac=false and sparse=true (#2064)

Merged pull requests:

• Add DiscreteFunction (#2058) (@ErikQQY)
• Faster and more robust torn_system_jacobian_sparsity (#2066) (@YingboMa)
• Add DiscreteFunctionExpr, DiscreteProblemExpr and docs (#2067) (@ErikQQY)
• Fix a cycle in dependency chasing (#2068) (@YingboMa)

v8.46.0

ModelingToolkit v8.46.0

Diff since v8.45.0

Closed issues:

• Add a misc metadata field which allows for taking Any (#2061)

Merged pull requests:

• Add misc metadata for variables/parameters (#2062) (@YingboMa)

v8.45.0

ModelingToolkit v8.45.0

Diff since v8.44.0

Merged pull requests:

• Add more flexible add_accumulations (#2060) (@YingboMa)

v8.44.0

ModelingToolkit v8.44.0

Diff since v8.43.0

Closed issues:

• Error introduced somewhere between MTK 8.22.1 and 8.29.1 - Regression (#1948)

Merged pull requests:

• Fix pantelides-with-ag corner case (#2009) (@Keno)
• Add support for indexing with a parameter (#2057) (@YingboMa)

v8.43.0

ModelingToolkit v8.43.0

Diff since v8.42.0

Closed issues:

• independent variable for complex numbers not working (#1947)
• Perturbation theory example exposes issue in structural_simplify? (#1994)
• Multivariate interpolation (#2039)
• ParentScope Bug (#2043)
• structural_simplify doesn't work with PDESystem (#2046)

Merged pull requests:

• Add MethodOfLines to Downstream (#1974) (@ChrisRackauckas)
• Apply scope recursively (#2044) (@YingboMa)
• Add block at named (#2045) (@YingboMa)
• avoid n^2 scaling in expand_instream (#2049) (@visr)
• format markdown (#2050) (@ArnoStrouwen)
• Add System that handles ODESystem and SDESystem (#2051) (@YingboMa)
• Add substitute for ODEProblem (#2054) (@YingboMa)
• Add accumulation (#2055) (@YingboMa)

v8.42.0

ModelingToolkit v8.42.0

Diff since v8.41.0

Closed issues:

• Unbalanced system error when using "compose" (#2027)
• Error when setting up matrix ODE (#2030)

Merged pull requests:

• [skip ci] docstring spelling (#2035) (@ArnoStrouwen)
• Fixes nested opt. systems for more than two levels (#2036) (@ValentinKaisermayer)
• Fix the if statements to add symbolic constraints in modelingtoolkitize of OptimizationProblem (#2040) (@Vaibhavdixit02)
• fix math rendering in docstring (#2041) (@baggepinnen)

v8.41.0

ModelingToolkit v8.41.0

Diff since v8.40.0

Closed issues:

• Hybrid system incorrectly unbalanced (#1987)

Merged pull requests:

• Handle constraints inside modelingtoolkitize of OptimizationSystem (#1983) (@Vaibhavdixit02)
• Better extra variable reporting and reverse the arrow in compute_diff_label (#2017) (@YingboMa)
• [skip ci] LanguageTool (#2019) (@ArnoStrouwen)
• more examples (#2021) (@ArnoStrouwen)
• CompatHelper: add new compat entry for StochasticDiffEq at version 6 for package docs, (keep existing compat) (#2022) (@github-actions[bot])
• CompatHelper: add new compat entry for StructuralIdentifiability at version 0.4 for package docs, (keep existing compat) (#2023) (@github-actions[bot])
• Allow to process caches as well (#2024) (@ValentinKaisermayer)
• more examples (#2025) (@ArnoStrouwen)

v8.40.0

ModelingToolkit v8.40.0

Diff since v8.39.0

Merged pull requests:

• option to set all dummy derivatives to zero in linearize (#2003) (@baggepinnen)

v8.39.0

ModelingToolkit v8.39.0

Diff since v8.38.0

Closed issues:

• Tests for Index Reduction and SCC fail (#2012)

Merged pull requests:

• Prevent repeated call of substituter(rules) in substitute. (#1963) (@evetion)
• consistent namespacing in add_input_disturbance (#1986) (@baggepinnen)
• pass analytic to ODEFunction (#1996) (@xtalax)
• Add copy method for SystemStructure (#1999) (@Keno)
• Allow empty inputs in generate_control_function (#2004) (@baggepinnen)
• add an example for parsing Julia expressions into ModelingToolkit solves (#2008) (@ChrisRackauckas)
• dummy_derivatives: Reset eqcolor every loop (#2011) (@Keno)
• [docs] Change plot vars to idxs (#2014) (@xlxs4)
• Add unknown_states (#2016) (@YingboMa)