v5.18.1

ModelingToolkit v5.18.1

Diff since v5.18.0

Closed issues:

• Handling of conv in build_function (#1020)

Merged pull requests:

• Optimize calculate_massmatrix (#1026) (@YingboMa)

v5.18.0

ModelingToolkit v5.18.0

Diff since v5.17.4

Merged pull requests:

• domain deprecations (#976) (@tinosulzer)

v5.17.4

ModelingToolkit v5.17.4

Diff since v5.17.3

Merged pull requests:

• Fix connect with varargs (#1023) (@YingboMa)

v5.17.3

ModelingToolkit v5.17.3

Diff since v5.17.2

Merged pull requests:

• Have ODEs from reactions include zero ODEs by default (#1022) (@isaacsas)

v5.17.2

ModelingToolkit v5.17.2

Diff since v5.17.1

Merged pull requests:

• add kwarg to disable checking number of equations and states agree (#1021) (@isaacsas)

v5.17.1

ModelingToolkit v5.17.1

Diff since v5.17.0

Closed issues:

• Simulation fails when using parameters in the initial value map (#991)
• passing NamedTuple as parameters (#1001)
• structural_simplify cannot detect variables depending on Differentials (#1003)
• Error trying modelingtoolkitize for single equation ODE (#1004)
• structural_simplify() Eliminates Key Equation (#1006)
• structural_simplify() bug with 2nd derivative (#1008)
• delay function from Modelica (#1010)
• Possible Inconsistent Initial Values of Some State Variables (#1015)
• Plotting fails for simplified system that was solved with the saveat keyword (#1018)

Merged pull requests:

• Fix modelingtoolkitize on scalar functions (#1005) (@ChrisRackauckas)
• support symbolic parameters at problem level (#1017) (@pepijndevos)
• fix and test sparse return (#1019) (@ChrisRackauckas)

v5.17.0

ModelingToolkit v5.17.0

Diff since v5.16.0

Closed issues:

• Feature request: support for discrete-time (function maps, Markov processes) (#571)
• Connectors (#814)
• System promotion (#817)
• t missing from variable map (#901)
• Display of systems not copyable (#907)
• broadcasted component instantiation (#912)
• Error when specifying a time variable forcing function if ModelingToolkit.jl is only imported (instead of using) (#975)
• Error related to model parameter using structural_simplify() (#979)
• Problem to run RC circuit tutorial (#980)
• ArgumentError: Term are missing from the variable map when trying to supply defaults for subsystems (#987)

Merged pull requests:

• Add system promotion (toodesystem) (#982) (@YingboMa)
• Overload write on AbstractSystems to write formatted Julia expressions (#985) (@YingboMa)
• DiscreteSystem (#986) (@ovile27)
• CompatHelper: bump compat for "Distributions" to "0.25" (#996) (@github-actions[bot])
• Add documentation for #900 and #777 (#997) (@pepijndevos)
• Update ode_modeling.md (#1000) (@CodeLenz)
• Allow JuliaFormatter 0.12 (#1002) (@ChrisRackauckas)

v5.16.0

ModelingToolkit v5.16.0

Diff since v5.15.1

Merged pull requests:

• Round-trip system printing (#978) (@YingboMa)

v5.15.1

ModelingToolkit v5.15.1

Diff since v5.15.0

Merged pull requests:

• Fix differential variable to state index mapping (#977) (@YingboMa)

v5.15.0

ModelingToolkit v5.15.0

Diff since v5.14.4

Closed issues:

• Sparsity pattern without calculating the Jacobian? (#871)
• substitute error for an equation with a parameter (#974)

Merged pull requests:

• Return jacobian_sparsity() when sparse && !jac (#968) (@akashkgarg)
• Add connectors (#973) (@YingboMa)