It is possible to compile C, C++, or Fortran code so that it is callable from Matlab. This kind of program is called a Matlab Executable (MEX) external interface function, or more brie y a \MEX- function." MEX enables the high performance of C,

Main reasons to write a MEX-file are: 1. To use pre-existing C/C++ or Fortran routines in Matlab without having to recode them. 2. Increase speed: most effective on loops.