How do I pass a function handle to my MATLAB C++ Math Library functions?

Some functions in the MATLAB C/C++ Math Library require function handles as inputs to functions. In the MATLAB C/C++ Math Library documentation, these type of functions are called function-functions. Their MATLAB counterparts are functions which require inputs of the form "@function". How do I create function handles to provide as inputs to these function-functions in C/C++?

Answer 1

[MathWorks Support Team]

In order to pass a function handle into your function, you must first register your function in the function look-up table. This is discussed in the C++ Math Library Users Guide.

Here is a simple example code that illustrates how to add the function "func" to the function table look-up.

 #include "matlab.hpp"

 mwArray func(mwArray x)    /*Function that will be passed as a handle to another function*/

 {

     return sin(x);

 }

 DECLARE_FEVAL_TABLE /*Macro that adds the function func into the FEVAL table*/

 FEVAL_ENTRY(func)

 END_FEVAL_TABLE

 int main(void)

 {

     mwArray x;

     mwArray x0(2);

     cout<<x0<<"\n"<<"\n"<<endl;

     x = fzero("func",x0);      /*func is passed to the function FZERO as a function handle*/

     cout<<x<<endl;

     return 0; 

 }