看一下演示MEX函数explorer.c，您可以使用MATLAB在pEX中打开它

Take a look at the demo MEX-function explore.c, which you can open in MATLAB using

edit([matlabroot '/extern/examples/mex/explore.c']);

在这里您会发现一堆函数，它们的名称都以analyze_开头，然后是类型(例如，analyze_uint8).在这些函数中，您将看到对mxGetData的调用的输出被强制转换为特定的C类型，如下所示:

In there you'll find a bunch of functions whose names all start with analyze_ and then a type (for example, analyze_uint8). In those functions you'll see the output of calls to mxGetData being cast to a particular C type, like this:

pr = (unsigned char *)mxGetData(array_ptr);

pr现在指向array_ptr的实部，即unsigned char的数组.

pr now points to the real part of array_ptr, an array of unsigned char.