Can I pass complex numbers from C++ to Matlab using feval or similar?

MATLAB states in the discussion on calling MATLAB from C++ that passed C++ native arguments must be scalars. Is there a way to pass complex numbers to MATLAB? Specifically, I want to use MATLAB to calculate Bessel functions and the argument to besselj must be complex.

Thanks

GF

[James Tursa]

Can you point me to a link for this discussion? I don't use the C++ interface myself, but I would be surprised if you could only pass scalar complex values.

Answer 1

[dpb]

See mxCreateNumericMatrix for C interface. It can create a complex array. I suppose there's also a C++ version but "I know nuthink!" about C++.

Or, you can write a wrapper function that calls besselj as

function res=mybesselj(nu,realpart,imaginarypart))
  res=besselj(nu,complex(realpart,imaginarypart));
end

or, if your case is such that it is for a specific nu, then that could be fixed and the wrapper function also pass the constant.

Or, if you're not doing really heavy lifting, I guess you could write specific code as string to pass that would include the essence of the wrapper function call that could be populated with the values dynamically. I've never used that technique as have almost always been going the other way to call the language from ML instead but don't see why can't be done if it's "cheap 'n easy!" for small problems...

[Gary Frazier]

Thanks very much.