使用mex进行混合编程的一些注意事项

1、mxGetPr的使用：

Use mxGetPr on arrays of type double only. Use mxIsDouble to validate the mxArray type. For other mxArray types, use mxGetData.

2、mxGetData的使用：

In C, mxGetData returns a void pointer (void *). Since void pointers point to a value that has no type, you must cast the return value to the pointer type that matches the type specified by pm. To see how MATLAB® types map to
their equivalent C types, see the table on the mxClassID reference page.