Build Fortran MEX File

This example shows how to build the example MEX file, timestwo. Use this example to verify the build configuration for your system.

To build a code example, first copy the file to a writable folder, such as c:\work, on your path:

copyfile(fullfile(matlabroot,'extern','examples','refbook','timestwo.F'),'.','f')

Use the mex command to build the MEX file.

mex timestwo.F

This command creates the file timestwo.ext, where ext is the value returned by the mexext function.

The timestwo function takes a scalar input and doubles it. Call timestwo as if it were a MATLAB^® function.

timestwo(4)

ans =
     8