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![10-2 Discrete Fourier Transform (離散傅立葉轉換)]()
mirlab.org如果 x[n] 恰巧是這些基本弦波中的其中一個，那麼計算出來的雙邊頻譜，應該只有兩個係數不為零，我們可用 MATLAB 驗證如下： Example 2: fft01.m % This example demonstrates the two-side DFT of a sinusoidal function % (此範例展示一個簡單正弦波的傅立葉 ...瀏覽：1288 -
![Fast Fourier transform - MATLAB fft - MathWorks]()
www.mathworks.comThis MATLAB function returns the discrete Fourier transform (DFT) of vector x, ... f = Fs/2*linspace(0,1,NFFT/2+1); % Plot single-sided amplitude spectrum. plot(f ...瀏覽：1245
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日期：2024-05-10
This MATLAB function computes the Fourier transform of f with respect to the transformation variable trans_var at the point eval_point....
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日期：2024-05-05
This MATLAB function returns the discrete Fourier transform (DFT) of vector x, computed with a fast Fourier transform (FFT) algorithm. ... The FFT functions (fft, fft2, fftn, ifft, ifft2, ifftn) are based on a library called FFTW [3],[4]. To compute an N-...
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日期：2024-05-04
The FFT in One Dimension Introduction Basic Spectral Analysis Spectral Analysis of a Whale Call Data Interpolation Using FFT Introduction The MATLAB fft function returns the DFT y of an input vector x using a fast Fourier transform algorithm: y = fft(x); ...
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日期：2024-05-10
The MATLAB® functions fft, fft2, and fftn (and their inverses ifft, ifft2, and ifftn, respectively) all use fast ......
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日期：2024-05-08
This MATLAB function returns the discrete Fourier transform (DFT) of vector x, computed with a fast ......
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日期：2024-05-06
The DFT is extremely important in the area of frequency (spectrum) analysis ... Figure 1 shows the DFT (implemented with Matlab's FFT function) of a cosine with....
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日期：2024-05-09
This example shows how to use the FFT function to analyze the variations in
sunspot activity over the last 300 years....
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日期：2024-05-06
Introduction. Spectral analysis is the process of identifying component
frequencies in data. For discrete data, the ......
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