v5.14.4

ModelingToolkit v5.14.4

Diff since v5.14.3

Closed issues:

• Variable naming in states vs. equations (#971)

Merged pull requests:

• Update latexify tests (#967) (@adamslc)

v5.14.3

ModelingToolkit v5.14.3

Diff since v5.14.2

Closed issues:

• Calling a function with inputs and outputs created by @variables triggers a MethodError (#781)
• MethodError: no method matching derivative(::typeof(conj), ...) (#805)
• Add check_consistency (#812)
• Component library (#883)
• structural_simplify throws for a high index circuit model (#933)
• Redundant equations causes a crash (#936)
• Missing occursin dispatches (#937)
• Internal error when using structural_simplify (#958)
• PDAESystem and Index Reduction (#961)
• Issue with alias_elimination (#963)

Merged pull requests:

• Implement variable scope (#900) (@pepijndevos)
• Add observed function for NonlinearFunctions (#926) (@YingboMa)
• Refactor & fix some minor bugs in alias elimination & add consistency check (#935) (@YingboMa)
• update create_array signature (#959) (@shashi)
• Fix length of is_linear_equations (#962) (@YingboMa)
• Fix faulty alias elimination (#964) (@YingboMa)

v5.14.2

ModelingToolkit v5.14.2

Diff since v5.14.1

Merged pull requests:

• change latexify test to make sure -1*x is rendered as -x (#951) (@catethos)
• Update usage of DestructuredArgs to use inbounds keyword (#953) (@matthieubulte)
• Update Downstream.yml (#954) (@anandijain)

v5.14.1

ModelingToolkit v5.14.1

Diff since v5.14.0

Closed issues:

• Use metadata to store "parameter" flag (#881)
• Degenerate equalities of differential variables requiring specific values of parameters cannot be reduced (#931)

Merged pull requests:

• Add DAEProblem overload for ODESystems (#897) (@YingboMa)
• Use metadata to denote parameters (#943) (@shashi)
• CompatHelper: bump compat for "SymbolicUtils" to "0.10" (#946) (@github-actions[bot])

v5.14.0

ModelingToolkit v5.14.0

Diff since v5.13.6

Closed issues:

• New opening tutorial (#874)
• Variable access from solution (#914)
• dae_index_lowering hangs for System with incomplete dependent variables (#922)
• Tearing issue with simplifying equations (#932)
• Feature Request: cosmetics for NonlinearSolve (#938)
• Testing equality of Reactions (#945)
• Creating ODESystem with defaults from ReactionSystem and default u0/pars (#947)

Merged pull requests:

• Fix a typo (#915) (@YingboMa)
• module docstring with extentision. add extensions to toml (#916) (@anandijain)
• [wip] pretty print system (#919) (@anandijain)
• Composing ReactionSystems (#920) (@isaacsas)
• New Introductory Example (#925) (@asprionj)
• Remove tests that are tested in Symbolics (#930) (@YingboMa)
• Tiny typos/consistency fix in docs (#939) (@pbouffard)
• Namespacing broken due to Num wrapping (#940) (@pepijndevos)
• forward kwargs to ODESystem, for things like defaults (#948) (@anandijain)
• Bump latexify compat (#949) (@ChrisRackauckas)

v5.13.6

ModelingToolkit v5.13.6

Diff since v5.13.5

Closed issues:

• Error in modelingtoolkitize, if no parameters are provided in ODEProblem (#911)

Merged pull requests:

• Fix mtkize with empty parameters (#913) (@YingboMa)

v5.13.5

ModelingToolkit v5.13.5

Diff since v5.13.4

Closed issues:

• Allow empty u0 in DEProblem constructors (#869)
• Error when supplying default_u0: Dict(kv): kv needs to be an iterator of tuples or pairs (#903)
• Access to vector of variables (#908)

Merged pull requests:

• Add check to avoid accidental singulatity error after structural_simplify (#899) (@pepijndevos)
• Allow incomplete initialization (#909) (@YingboMa)

v5.13.4

ModelingToolkit v5.13.4

Diff since v5.13.3

Closed issues:

• Building ODEProblem of non-simplified, connected system: cryptic error (#890)
• default_u0 and default_p -> defaults (#898)
• structural_simplify of hierarchical system results in empty system (#906)

Merged pull requests:

• Add the MTK paper in README (#896) (@YingboMa)
• Point to ColPrac and forums within the docs (#904) (@pbouffard)
• Use defaults and variable mapping clean up (#905) (@YingboMa)

v5.13.3

ModelingToolkit v5.13.3

Diff since v5.13.2

Closed issues:

• Incorrect result (#889)

Merged pull requests:

• Throw an error when D(x) appears in the RHS (#895) (@YingboMa)

v5.13.2

ModelingToolkit v5.13.2

Diff since v5.13.1

Closed issues:

• Significant performance regression generating BCR vs DEBio (#553)
• Slowdown with build_function output in recent versions (#800)

Merged pull requests:

• Overload propertynames and add @nonamespace (#882) (@YingboMa)
• Add unit and connect metadata (#885) (@YingboMa)
• Add iszero check in linear equation detection (#886) (@YingboMa)
• Use at set! in first_order_transform and call diff2term in varmap (#888) (@YingboMa)