Min step size
Minimum step size for variable-step solver
Model Configuration Pane: Solver
Description
The Min step size parameter specifies the smallest step size, in seconds, for the variable-step solver.
When you configure a referenced model to use a local solver, the Min step size parameter of the referenced model specifies the minimum step size for the local solver. (since R2025a)
Dependencies
To enable this parameter, set the solver Type to Variable-step.
Settings
auto (default) | positive scalar numberBy default, the Min step size parameter value is auto, and the software determines a minimum step size on the order of machine precision.
When you specify the minimum step size as auto or as a positive scalar number, the software allows the solver to take an unlimited number of steps of the specified size.
Tips
To specify how many times the software allows the solver to take a step of the specified size before issuing a diagnostic, use the Number of consecutive min steps parameter.
To specify the diagnostic behavior when the solver exceeds the number of specified minimum-sized steps, use the Min step size violation parameter.
When the solver needs to take a smaller step to meet error tolerances, the software issues a warning that indicates the current effective relative tolerance.
The Min step size parameter determines the step size of the variable-step ODE solver. The size is limited by the smallest discrete sample time in the model.
Programmatic Use
Parameter: MinStep |
| Type: string | character vector |
Value:
"auto" | positive scalar number |
Default:
"auto" |
Version History
Introduced before R2006a
