v8.31.0

ModelingToolkit v8.31.0

Diff since v8.30.0

Closed issues:

• Allow passing kwargs to connect (#1094)
• Default values do not work for Vector{Symbolics.Arr} (#1186)
• Proposal for @constants (#1802)
• mathengine (#1910)

Merged pull requests:

• Adds support for inequalities (#1799) (@ValentinKaisermayer)
• Adding @Constants (#1821) (@lamorton)
• Handle vector valued variables correctly in get_connection_type (#1895) (@YingboMa)
• Only generate sparsity when sparsity is wanted (#1899) (@YingboMa)
• Add TimeDomain, Clock, and their inference (#1912) (@YingboMa)
• Show plots in docs (#1914) (@ValentinKaisermayer)

v8.30.0

ModelingToolkit v8.30.0

Diff since v8.29.1

Closed issues:

• Compilation error: handle_varmap undefined (#1904)

Merged pull requests:

• Add one-arg observed dispatch (#1893) (@YingboMa)
• If the RHS of an alias doesn't appear in the equations, then it's reducible (#1894) (@YingboMa)
• Add tspan to *System (#1898) (@YingboMa)
• Add one missing case in the complete alias generation (#1900) (@YingboMa)
• Fix wrong variable name in OptimizationProblemExpr (#1903) (@AayushSabharwal)
• Add missing gensym (#1907) (@YingboMa)

v8.29.1

ModelingToolkit v8.29.1

Diff since v8.29.0

Merged pull requests:

• Fix ODEFunction QuoteNode bug and implement iip_config (#1887) (@bradcarman)
• Use faster data structure for the transitive closure calculation and fast symbolic substitution (#1888) (@YingboMa)
• Make tearing only allocate O(N) memory and fix count_nonzeros perf problem (#1889) (@YingboMa)
• state_selection: Correct is_not_present condition (#1890) (@Keno)
• Handle self-alias in a differentiation chain more carefully (#1891) (@YingboMa)
• spelling fix (#1892) (@jaakkor2)

v8.29.0

ModelingToolkit v8.29.0

Diff since v8.28.4

Merged pull requests:

• Remake with symbolic map (#1835) (@xtalax)

v8.28.4

ModelingToolkit v8.28.4

Diff since v8.28.3

Merged pull requests:

• Add sparsity option to ODEFunctionExpr (#1886) (@YingboMa)

v8.28.3

ModelingToolkit v8.28.3

Diff since v8.28.2

Merged pull requests:

• More enum handling fixes (#1885) (@ChrisRackauckas)

v8.28.2

ModelingToolkit v8.28.2

Diff since v8.28.1

v8.28.1

ModelingToolkit v8.28.1

Diff since v8.28.0

Closed issues:

• Segfault during call to ODEProblem (#1820)

Merged pull requests:

• Update retcode to == for back and forwards compatability (#1884) (@ChrisRackauckas)

v8.28.0

ModelingToolkit v8.28.0

Diff since v8.27.1

Merged pull requests:

• Update structural info after alias elimination (#1872) (@YingboMa)
• expose tofloat for ODEProblem (#1878) (@bradcarman)
• Call the right solver in tests (#1882) (@YingboMa)
• preserve sys in ODEFunction from ODAEProblem (#1883) (@anandijain)

v8.27.1

ModelingToolkit v8.27.1

Diff since v8.27.0

Closed issues:

• Documentation: Tutorial on ODE/DAE systems coming from semi-discretized PDE System modelling (#1480)
• Variable is not a function of independent variable error for trivial example (#1880)

Merged pull requests:

• Minimize the number of passes we go through symbolic equations in structural simplify (#1870) (@YingboMa)
• Faster alias elimination symbolic update (#1871) (@YingboMa)
• ODAEProblem doesn't pass paramsyms (#1875) (@AayushSabharwal)
• Add SciML/ModelOrderReduction.jl to downstream integration test (#1881) (@bowenszhu)