nelson.ode.options.ODE78

📝Syntax

options = nelson.ode.options.ODE78()
options = nelson.ode.options.ODE78(name, value)

📄Description

nelson.ode.options.ODE78 creates a compatible option class for the 'ode78' solver value used by the ode object workflow.

Option group	Names	Purpose
Steps	InitialStep, MaxStep, MinStep	Bound the adaptive step size selection.
Error control	NormControl	Switch between componentwise and norm based error control.
Output	OutputFcn, OutputSelection	Select output callbacks and returned components.

The 'ode78' solver value uses a high order explicit Runge-Kutta (7,8) pair, efficient for smooth nonstiff problems solved with tight tolerances.

Supported properties are InitialStep, MaxStep, MinStep, NormControl, OutputFcn, and OutputSelection. InitialStep, MaxStep, and MinStep are positive scalars bounding the adaptive step size; their default value is empty, which lets the solver choose them automatically. NormControl accepts 'on' or 'off' (default 'off') and enables error control based on the norm of the solution instead of componentwise control. OutputFcn is a function handle called on each output point (default empty). OutputSelection is a vector of indices selecting which solution components are passed to the output function (default empty, all components). The default Refine value for this solver is 8.

💡Examples

Create a nonstiff problem solved with ode78 options.

options = nelson.ode.options.ODE78('InitialStep', 0.01);
problem = ode('ODEFcn', @(t,y) -y, 'InitialValue', 1, ...
  'SolverOptions', options);
result = solve(problem, 0, 1)