A MEX file is a function, created in MATLAB, that calls a C/C++ program or a Fortran subroutine. A MEX function behaves just like a MATLAB script or function.

To call a MEX function, use the name of the MEX file, without the file extension. The MEX file contains only one function or subroutine. The calling syntax depends on the input and output arguments defined by the MEX function. The MEX file must be on your MATLAB path.

While MATLAB scripts and functions have platform-independent extensions .m and .mlx , MEX functions have these 64-bit platform-specific file extensions:

To experiment with calling MEX functions, use the code in Tables of MEX Function Source Code Examples to build and run examples.

For information about creating MEX functions, see:

For information about using MEX S-functions in models, see your Simulink ^® documentation.