中文说明：有对数字信号处理书上的课后matlab练习不太擅长的同学，可以参考这个哟~代码是有关数字信号处理matlab编程实验：求4点、8点、16点DFT矩形序列，可以直接运行，没有错误。适用于matlab7.0及以上版本。
English Description：
There are students who are not very good at matlab exercises in the digital signal processing book, you can refer to this yo ~ code is about digital signal processing matlab programming experiment: find 4 points, 8 points, 16 points DFT rectangular sequence, can run directly, no error. It is suitable for MATLAB 7.0 and above.