v9.0.0

ModelingToolkit v9.0.0

Diff since v8.75.0

Merged pull requests:

• [BREAKING Don't merge] Support DynamicQuantities (#2349) (@YingboMa)
• add component-based hybrid system test (#2355) (@baggepinnen)
• Getcoeffchunk (#2393) (@chriselrod)
• Preserve staticarrays in the problem construction (#2399) (@ChrisRackauckas)
• Fix some warnings (#2405) (@isaacsas)
• build(deps): bump crate-ci/typos from 1.16.25 to 1.17.0 (#2419) (@dependabot[bot])
• CompatHelper: bump compat for DynamicQuantities to 0.11, (keep existing compat) (#2424) (@github-actions[bot])
• Replace MacroTools with ExprTools & Base.remove_lines! (#2425) (@oxinabox)
• Consistent variable creation (#2428) (@YingboMa)
• build(deps): bump actions/cache from 3 to 4 (#2430) (@dependabot[bot])
• fix(pdesystem): parameters are vector of Num instead of vector of pairs when analytic is also passed (#2431) (@sathvikbhagavan)
• refactor: rename states to unknowns, and related changes (#2432) (@AayushSabharwal)
• feat!: deprecate ODAEProblem (#2435) (@AayushSabharwal)
• refactor!: require systems to be completed before creating XProblem/XProblemExpr (#2436) (@AayushSabharwal)
• test: uncomment tests (#2439) (@AayushSabharwal)
• refactor!: remove old discrete system (#2440) (@AayushSabharwal)
• feat!: add common definitions of t and D (#2442) (@AayushSabharwal)
• fix!: require explicit independent variable for ODESystem (#2443) (@AayushSabharwal)
• Update bifurcation_diagram_computation.md (#2444) (@rveltz)
• Update bifurcation_diagram_computation.md, add periodic orbits comput… (#2445) (@rveltz)
• chore: remove undefined exports (#2446) (@sathvikbhagavan)
• feat!: use SciMLStructures and add new MTKParameters (#2447) (@AayushSabharwal)
• build(deps): bump codecov/codecov-action from 3 to 4 (#2448) (@dependabot[bot])
• build(deps): bump crate-ci/typos from 1.17.0 to 1.18.0 (#2449) (@dependabot[bot])
• Have CI tests depend on formatter passing (#2451) (@chriselrod)
• [skip ci] Update dependabot.yml (#2452) (@ArnoStrouwen)
• ci: explicitly specify token for codecov (#2454) (@thazhemadam)
• Pin JuliaFormatter (#2456) (@YingboMa)
• docs: use @mtkbuild instead of manually calling complete (#2460) (@AayushSabharwal)
• Fix test groupings and test setup (#2465) (@ChrisRackauckas)
• docs: update NEWS.md with v9 update notes (#2466) (@AayushSabharwal)
• build: bump compat of DomainSets (#2467) (@sathvikbhagavan)
• Correct number of srcs in complete (#2468) (@Keno)
• feat!: do not scalarize parameters, fix some tests (#2469) (@AayushSabharwal)
• Format (#2471) (@YingboMa)
• docs: update NEWS.md (#2473) (@AayushSabharwal)

Closed issues:

• ODESystem created calling external vector valued function (#1828)
• Missing initialization of discrete-to-continuous communication parameter (#2356)
• ModelingToolkit does not save array as static arrays (for initial conditions and parameter values) (#2398)
• Internation functions for conversion between various forms of representing states/parameters etc. (e.g. symbolics or indexes) (#2404)
• Cannot access observed variables in NonlinearSolution (#2420)
• Precompilation of ModelingToolkit reports two errors on Julia 1.10 (#2429)
• Basic (but incomplete) system construction throws incorrect error on get_system (#2464)
• structural_simplify of SDESystem (#2476)