使用gui数据的错误。h必须是一个图形或图形的句柄。

i am pretty new in matlab and I am facing some problems. really appreciate if someone could help me out. I am currently doing a project on face detection and I would want to allow users to on the webcam whereby he/she will have a face detected. Once the webcam is off, the function will be shut down. But the problem is I am unable to shut down the program but only able to do so with the help of ctrl + c, besides that instead of viewing it in the axes1, it opens up in a video player. My code is as attached:i am pretty new in matlab and I am facing some