怎么用matlab画出图片的频谱分析图?
http://zhidao.baidu.com/question/1304276198940846059.html?fr=iks&word=x%3D1%3A0.1%3A10%3B+y%3Df%28x%29%3B+%CA%B1%D3%F2%3Aplot%28x%2Cy%29%3B+y0%3Dfft%28y%29%3B+plot%28x%2Cabs%28y0%29%29%3B+plot%28x%2Cangle%28y0%29%29+%D7%B7%CE%CA+%C6%B5%C6%D7%C4%D8%3F+%D7%B7%B4%F0+y0%3Dfft%28y%29&ie=gbk ——百度知道
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答:5.因此,在谱中(fs/2,fs)是无用谱,所以域向量和频域信号的距离向量应该减半。F=F(1,N/2);Y=abs(FFT(x));Y=Y(1。n/2);我们可以画出信号的时域和频域。