Solver Jacobian Method

Method implicit solvers use to compute Jacobian matrix

Model Configuration Pane: Solver

Description

The Solver Jacobian Method parameter specifies how implicit solvers compute the Jacobian matrix. Selecting a sparse Jacobian method might speed up simulation for models with many continuous states.

Dependencies

To enable this parameter, configure your model with one of these parameter combinations:

  • Set the solver Type to Variable-step and use the Solver parameter to select one of these implicit solvers:

    • ode15s (stiff/NDF)

    • ode23s (stiff/Mod. Rosenbrock)

    • ode23t (mod. stiff/Trapezoidal)

    • ode23tb (stiff/TR-BDF2)

    • daessc (DAE solver for Simscape™)

  • Set the solver Type to Variable-step. For the Solver parameter, select odeN (Nonadaptive). Then, for the Integration method parameter, select ode14x (extrapolation).

  • Set the solver Type to Fixed-step and set the Solver parameter to ode14x (extrapolation) or ode1be (Backward Euler).

Settings

auto (default) | Sparse perturbation | Full perturbation | Sparse analytical | Full analytical

By default, the software chooses the Jacobian method. For most models, the solver chooses a Jacobian method with sufficient accuracy.

When a referenced model configured to use a local solver has an implicit top solver or parent solver, this parameter value must be auto or Full perturbation.

For more information, see Choose a Jacobian Method for an Implicit Solver.

Programmatic Use

Parameter: SolverJacobianMethodControl
Type: string | character vector
Value: "auto" | "SparsePerturbation" | "FullPerturbation" | "SparseAnalytical" | "FullAnalytical"
Default: "auto"

Version History

Introduced in R2010b

See Also

Topics