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我有图表 y 轴的数据，我需要对数据执行 FFT 并绘制它。我对 MATLAB 没有太多经验，因此非常感谢任何帮助。
http://www.mathworks.com/help/techdoc/ref/fft.html
http://www.ele.uri.edu/~hansenj/projects/ele436/fft.pdf