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smart function to switch functions

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feynman feynman
feynman feynman 2024-4-28
评论： feynman feynman 2024-4-30
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?

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采纳的回答

Stephen23
Stephen23 2024-4-28
编辑：Stephen23 2024-4-28
You could use STR2FUNC:
str = 'ode23';
odesolver = str2func(str);
odesolver(@fun,..)
or simply use FEVAL:
feval(str,@fun,..)

更多回答（2 个）

Anton Kogios
Anton Kogios 2024-4-28
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
Steven Lord
Steven Lord 2024-4-29
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.
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Steven Lord
Steven Lord 2024-4-29
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.

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