Determine whether mxArray represents data as signed 64-bit integers
#include "matrix.h" bool mxIsInt64(const mxArray *pm);
mxIsInt64 returns logical 1
(true) if the mxArray represents its real and
imaginary data as 64-bit signed integers. Otherwise, it returns logical
0 (false).
In C, calling mxIsInt64 is equivalent to calling:
mxGetClassID(pm) == mxINT64_CLASS