I get an error using fminsearch and says Simulink model "model ex3" was called with incorrect number of arguments. I have attached a picture to show it.

I get an error using fminsearch and says Simulink model "model ex3" was called with incorrect number of arguments. I have attached a picture to show it.

[Paul]

Calling a model programatically like that is not typically used for most applications. Also, the inputs to and outputs from the model called as a function is not the interface required by fminsearch, so some more function wrapping would be needed.

Can you shed more insight into exactly what you're trying to do with that model within fminsearch? For example, are you trying to use fminearch to find some model parameters that minimize a scalar figure of merit derived from simulating the model?

Answer 1

[Torsten]

Try calling fminsearch as

[xSolution,fval] = fminsearch(@(x)model_ex3(x,par),x0)

If this doesn't work, we need to know the inputs expected for model_ex3.

[Walter Roberson]

I wonder whether the model is constructed to have inputs at all? Might need to write a wrapper function that does something similar to assignin('base', 'SomeVariable', x) and then invoking model_ex3