v9.25.0

ModelingToolkit v9.25.0

Diff since v9.24.0

Merged pull requests:

• Extend initialization equations (#2846) (@hersle)
• Handle modelingtoolkitize for nonlinearleastsquaresproblem (#2847) (@ChrisRackauckas)
• Left-to-right expand observed equations into defaults during initialization (#2861) (@hersle)
• Create independent variables with @independent_variables (#2862) (@hersle)
• Capture observed dependence on unknowns in simplified nonlinear systems (#2863) (@hersle)
• Error missing defaults (#2864) (@hersle)
• Extend metadata (#2867) (@hersle)
• refactor: avoid substitute warning when not needed (#2869) (@SebastianM-C)
• Add more documentation (#2871) (@hersle)
• Export more functions relating to system initialization (#2872) (@hersle)
• Restore error when unknowns in the initialization system don't have guesses (#2877) (@hersle)
• Some repo cleanup (#2878) (@ChrisRackauckas)
• Allow for setting fully_determined=true in initialization (#2879) (@ChrisRackauckas)

Closed issues:

• Duplicate Global Parameters (#992)
• Documentation for equations, equations, full_equations (#1822)
• Some ODESystem fields such as metadata are lost when using the extend function (#2502)
• Allow altering a symbolic parameter default value after creation. (#2650)
• Add NonlinearLeastSquaresProblem dispatch for modelingtoolkitize (#2669)
• Error when plotting multiple (not single) observable in Symbol form (#2739)
• Custom independent variable leads to underdetermined initialization system (#2818)
• Precompiling MTK when --depwarn=yes or --depwarn=true causes deprecation warning (#2827)
• extend() does not pass on initialization equations (#2845)
• testing against Julia 1.6 LTS dropped (#2854)
• Subsystem not namespaced when substituted coefficient is 1 (#2855)
• Cannot initialize well-defined ODE with defaults (#2859)
• Helpful error for missing guesses has disappeared (#2873)