matlab的版本要到2015b才支持vs2015，然而自己电脑上用的matlab2014a，和VS2015社区版，不想重新安装，需要替换其mexopts文件夹，估计就类似于一个mex的Makefile文件，路径为R2014a\bin\win64\mexopts。下载之，替换即可。mexopts文件夹的下载地址为
http://pan.baidu.com/s/1o8hR926
，之后做以下步骤编译即可。
>> mex -setup
MEX 配置为使用 ‘Microsoft Visual C++ 2015 Professional (C)‘ 以进行 C 语言编译。
Warning: The MATLAB C and Fortran API has changed to support MATLAB
variables with more than 2^32-1 elements. In the near future
you will be required to update your code to utilize the
new API. You can find more information about this at:
要选择不同的语言，请从以下选项中选择一种命令:
mex -setup C++
mex -setup FORTRAN
>> mex -setup C++
MEX 配置为使用 ‘Microsoft Visual C++ 2015 Professional‘ 以进行 C++ 语言编译。
Warning: The MATLAB C and Fortran API has changed to support MATLAB
variables with more than 2^32-1 elements. In the near future
you will be required to update your code to utilize the
new API. You can find more information about this at:
>> mex -v yourfile.cpp
原文：http://www.cnblogs.com/Yan47/p/6418129.html