如果蛤蟆吃不能用就用nmatrix
http://feather1231.myweb.hinet.net/下载地址
http://v.youku.com/v_show/id_XODkxNjIyOTUy.html?
tpa=dW5pb25faWQ9MTAzMjUyXzEwMDAwMV8wMV8wMQ视频地址