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odeget

Extract ODE option values

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Syntax

v = odeget(options,"Name")
v = odeget(options,"Name",default)

Description

v = odeget(options,"Name") extracts the value of the named option from options, which is a structure containing option values. Use odeset to create or update the options structure.

example

v = odeget(options,"Name",default) returns the value v = default if the named option does not have a value specified in options.

example

Examples

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Create an options structure using odeset that contains several values for different options. 

M = @(t) [t 0; 0 -t];
options = odeset(RelTol=1e-4,AbsTol=1e-5,OutputFcn=@odephas2,...
    Mass=M,MassSingular="no",MStateDependence="none")
options = struct with fields:
              AbsTol: 1.0000e-05
                 BDF: []
              Events: []
         InitialStep: []
            Jacobian: []
           JConstant: []
            JPattern: []
                Mass: @(t)[t,0;0,-t]
        MassSingular: 'no'
            MaxOrder: []
             MaxStep: []
             MinStep: []
         NonNegative: []
         NormControl: []
           OutputFcn: @odephas2
           OutputSel: []
              Refine: []
              RelTol: 1.0000e-04
               Stats: []
          Vectorized: []
    MStateDependence: 'none'
           MvPattern: []
        InitialSlope: []

Use odeget to extract the value of the OutputFcn field from the options structure.

v = odeget(options,"OutputFcn")
v = function_handle with value:
    @odephas2

Now extract the value of the Refine field. Since this field is not set, odeget returns an empty matrix [].

v = odeget(options,"Refine")
v =

     []

You can specify a third input to odeget to change the default return value. This ensures that v is never empty.

v = odeget(options,Refine=1)
v = 
1

Input Arguments

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Options structure. Use odeset to create or modify the options structure.

Example: options = odeset(RelTol=1e-4,AbsTol=1e-5) returns an options structure with values specified for the relative and absolute error tolerances.

Data Types: struct

Option name, specified as any valid option accepted by odeset:

  • Error control — "AbsTol", "RelTol", "NormControl"

  • Output control — "NonNegative", "OutputFcn", "OutputSel", "Refine", "Stats"

  • Solver steps — "InitialStep", "MaxStep", "MinStep"

  • Event functions — "Events"

  • Jacobian matrix — "Jacobian", "JPattern", "Vectorized"

  • Mass matrix — "Mass", "MStateDependence", "MvPattern", "MassSingular", "InitialSlope"

  • Algorithm options for ode15s and ode15i — "MaxOrder", "BDF"

Example: v = odeget(options,"AbsTol")

Data Types: char | string

Default return value, specified as any valid MATLAB object.

Example: v = odeget(options,AbsTol=1e-6) returns 1e-6 if options does not have a value set for AbsTol.

Data Types: s | single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | logical | char | struct | table | cell | function_handle | categorical

Extended Capabilities

Thread-Based Environment
Run code in the background using MATLAB® backgroundPool or accelerate code with Parallel Computing Toolbox™ ThreadPool.

Version History

Introduced before R2006a

See Also

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