v8.0.0

ModelingToolkit v8.0.0

Diff since v7.1.3

Closed issues:

• FMI support? (#135)
• Regression from v5 "type Term has no field lhs" (#1295)
• Variable names not kept when solving DiscreteProblems (#1329)
• variables coming from observed kwarg not added to var_to_name (#1335)
• Alias elimination internal error (#1358)
• Failure in tearing with a series electrical circuit (#1363)
• Access to subsystems and variables of these systems (#1366)
• Rules for writing DAE equations (#1377)
• Continuous event / affect not working (#1386)
• Add Github repository to package manager (#1388)
• Optimization Example doesn't work (#1390)
• Cannot modify the initial guess for the torn equations in ODAESystem (#1391)
• What is possible to do in an affect statement? (#1395)
• Broadcasting differential not allowed for array of size 1 (#1402)
• Passing default parameters is broken for vectors (#1403)
• How to use ModelingToolkit.jl solve a system of nonlinear equations？ (#1405)

Merged pull requests:

• add observed to var_to_name Dict (#1343) (@isaacsas)
• Expand connections after model instantiation and add stream connectors (#1348) (@YingboMa)
• Refactor tearing (#1355) (@Keno)
• Add some comments in alias elimination (#1360) (@YingboMa)
• CompatHelper: bump compat for SpecialFunctions to 2, (keep existing compat) (#1361) (@github-actions[bot])
• Make sure that the alias candidate is an integer (#1364) (@YingboMa)
• Limit the inline nlsolve size (#1367) (@YingboMa)
• Add array variable support for connect (#1368) (@YingboMa)
• Define isaffine methods for AbstractSystem (#1370) (@andreasnoack)
• Add structure to DiscreteSystem (#1371) (@baggepinnen)
• Drive by: Fix conditional (#1372) (@Keno)
• fix collect_difference_variables (#1375) (@baggepinnen)
• Fix bug in bareiss algorithm (#1380) (@Keno)
• Make the modelingtoolkitize tutorial much simpler (#1393) (@ChrisRackauckas)
• CI for LTS (#1397) (@ChrisRackauckas)
• handle disc. and cont. events in ODAEProblem (#1398) (@baggepinnen)
• CompatHelper: bump compat for JuliaFormatter to 0.20, (keep existing compat) (#1400) (@github-actions[bot])
• Fix ODAEProblem codegen (#1404) (@YingboMa)
• CompatHelper: bump compat for SymbolicUtils to 0.19, (keep existing compat) (#1407) (@github-actions[bot])
• Fix torn_system_jacobian_sparsity (#1408) (@YingboMa)
• v8 Release (#1410) (@YingboMa)

v7.1.3

ModelingToolkit v7.1.3

Diff since v7.1.2

Closed issues:

• The nonlinear solver failed with the return code MAXITERS_EXCEED... (#1351)
• Accessing the result of an observed variable (#1352)

Merged pull requests:

• Refactor (inv_)assign/{var/eq}assoc variables into proper structs (#1350) (@Keno)
• Fix typo in alias elimination (#1356) (@Keno)
• Fix compact_graph! in tearing (#1357) (@YingboMa)

v7.1.2

ModelingToolkit v7.1.2

Diff since v7.1.1

Merged pull requests:

• CompatHelper: bump compat for JuliaFormatter to 0.19, (keep existing compat) (#1342) (@github-actions[bot])
• Don't overparametrize BipartiteGraph (#1346) (@Keno)
• BipartiteGraph: Clean up Graphs.jl integration (#1347) (@Keno)
• Make sure x in AliasGraphKeySet is in bounds (#1349) (@YingboMa)

v7.1.1

ModelingToolkit v7.1.1

Diff since v7.1.0

Merged pull requests:

• collect -> scalarize (#1341) (@YingboMa)

v7.1.0

ModelingToolkit v7.1.0

Diff since v7.0.0

Closed issues:

• Support for events (#38)
• Dependency issue, MTK 7.0.0 not compatible with the latest release of DifferentialEquations.jl (#1339)

Merged pull requests:

• Include root-finding equations in ODESystem (#1337) (@baggepinnen)
• Refactor tearing code (#1338) (@Keno)
• CompatHelper: bump compat for DiffEqJump to 8, (keep existing compat) (#1340) (@github-actions[bot])

v7.0.0

ModelingToolkit v7.0.0

Diff since v6.7.1

Closed issues:

• Jacobian order (#1303)
• Failure of a tutorial example due to the missing name keyword (#1326)

Merged pull requests:

• switch LightGraphs to Graphs (#1306) (@isaacsas)
• [WIP] Update Symbolics and SymbolicUtils version (#1318) (@0x0f0f0f)
• Refactor Alias Elimination some more (#1324) (@Keno)
• Corrected the name vs @named problem in the tutorial (#1327) (@hurak)
• Replace open coded tarjan algorithm by Graphs.jl version (#1328) (@Keno)
• Propagate state names to DiscreteProblem (#1331) (@baggepinnen)
• fix docstring (#1332) (@baggepinnen)
• Add some documentation of the internals (#1333) (@baggepinnen)
• remove redundant value and scalarize calls (#1334) (@isaacsas)
• reduce all_dimensionless allocations (#1336) (@isaacsas)

v6.7.1

ModelingToolkit v6.7.1

Diff since v6.7.0

Closed issues:

• observed: questions and issues (#1288)

Merged pull requests:

• Refactor use of the Bareiss algorithm (#1301) (@Keno)
• Fix NullParameter get_unit handling (#1308) (@ChrisRackauckas)
• explicit name argument in example (#1310) (@baggepinnen)
• stop importing unflatten_long_ops (#1313) (@YingboMa)
• Add term handling in build_observed_function (#1315) (@YingboMa)

v6.7.0

ModelingToolkit v6.7.0

Diff since v6.6.0

Merged pull requests:

• CompatHelper: bump compat for JuliaFormatter to 0.18, (keep existing compat) (#1293) (@github-actions[bot])
• Bump versions (#1300) (@YingboMa)

v6.6.0

ModelingToolkit v6.6.0

Diff since v6.5.2

Closed issues:

• propertynames errors for system with array variable (#1202)
• Add ability to customize the name of the system generated by modelingtoolkitize (#1276)
• Unbalanced System (# of equations, # of variables) (#1284)

Merged pull requests:

• add nicer discrete sys -> prob constructor (#1268) (@anandijain)
• Add connection_type to DiscreteSystem (#1272) (@ven-k)
• add isvariable for Nums (#1289) (@isaacsas)
• CompatHelper: bump compat for JuliaFormatter to 0.17, (keep existing compat) (#1290) (@github-actions[bot])
• Drop extraneous line in varmap_to_vars (#1292) (@isaacsas)

v6.5.2

ModelingToolkit v6.5.2

Diff since v6.5.1

Closed issues:

• parameters returns non-unique set of parameters (#1267)

Merged pull requests:

• make parameters unique (#1277) (@isaacsas)
• Make the return behavior of modified_states consistent (#1278) (@isaacsas)
• Add quick_cancel in alias_elimination (#1279) (@YingboMa)