generating a sampling frequency of 2000, a digital signal composed of 50Hz, 120Hz, 200Hz sine and noise signals, filter out the frequency of 150Hz>f>100Hz, and calculate and display the original data waveforms before and after the filtering and the power spectral density.

Filename	Size	Update
9图形界面编程.ppt	456192	2012-10-16
ball.fig	1974	2011-11-23
ball.m	7354	2010-10-01

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