已知的一组原始数据(x,y),怎么用matlab绘制时域波形图和频谱图_百度知...
http://zhidao.baidu.com/question/2053562310697402067.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：输入和输出的数组x和y是离散后的实际值，还是传递函数的输入和输出，这个需要先反拉氏变换ilaplace。然后用傅里叶变换fft实现。频谱图还要用到fftshift。