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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：1153 -
![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：882
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日期：2025-04-28
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：2025-04-26
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：2025-04-27
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：2025-04-29
Matlab - Fourier Analysis 主講人：林麗娟 主講部分：FFT & 例題 Fourier Transform Fourier Transform Compare DTFT & DFT FFT & IFFT 波函式經FFT後的純量和相位 Matlab - Fourier Analysis 主講人：林麗娟 主講部分：FFT & 例題 Fourier Transform Fourier ......
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日期：2025-04-27
In today’s post, I will show you how to perform a two-dimensional Fast Fourier Transform in Matlab. The 2D Fourier Transform is an indispensable tool in many fields, including image processing, radar, optics and machine vision. In image processing, the 2D...
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日期：2025-04-30
Shows how to perform a Fourier transform in Matlab. ... I working on a project that using audible sound to detect cracked eggs. The idea is that: excite a sound toward the egg, then record the feflecting sound, and to use FFT analyse it....
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日期：2025-04-28
>> clear >> t=[-2:0.01:2]; >> g=sqrt((t.^2)-4); >> plot(t,imag(g), 'r'); >> hold on >> plot(t,imag(fft(g)), 'b'); Not sure exactly what your problem is asking, but this might do it. I just use the built-in Fourier transform of Matlab. I assume you don't h...
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日期：2025-04-25
The Fourier transform (English pronunciation: / ˈ f ɔər i eɪ /), named after Joseph Fourier, is a mathematical transformation ... — A Matlab tutorial (thefouriertransform.com) (Tip: drag magnitude or phase dots up or down to change the wave form). (Java A...
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