smart function to switch functions

Suppose I want to tune different ode solvers to run:

ode23(@fun,...)

I want to use 'odesolver' so that

odesolver(@fun,...) actually runs ode23(@fun,...) when specifying odesolver=='ode23' and runs ode45(@fun,...) when specifying odesolver=='ode45'. Is there a smart way to do it?

Answer 1

[Stephen23]

You could use STR2FUNC:

str = 'ode23';
odesolver = str2func(str);
odesolver(@fun,..)

or simply use FEVAL:

feval(str,@fun,..)

Answer 2

[Anton Kogios]

You could set up a function with a switch statement, something like:

function odesolver(@fun,odesolverStr)
switch odesolverStr
    case 'ode23'
        ode23(@fun)
    case 'ode45'
        ode45(@fun)
    otherwise
        error('Incorrect ode solver specified.')
end
end

[feynman feynman]

Thank you very much. But I accepted the answer that is shorter

Answer 3

[Steven Lord]

If you're using a sufficiently recent release (release R2023b or later) use the ode object and specify the Solver property to tell the object which ODE solver to use.

[feynman feynman]

Thank you so much for this comment. I see that SelectedSolver seems to be chosen automatically according to different ODEs? If so, is this automatic selection also in older matlab versions?

[Steven Lord]

The ode object was introduced in release R2023b. It doesn't exist in earlier releases. There isn't a way to "automatically have MATLAB decide which ODE solver to call" in earlier releases.

[feynman feynman]

thank you