Develop an M-file function that uses the fft function to generate a power spectrum plot. Use it

Question:

Develop an M-file function that uses the fft function to generate a power spectrum plot. Use it to solve Prob. 16.9.

Data From Problem16.9

Duplicate Example 16.3, but for 64 points sampled at a rate of Δt = 0.01 s from the function

f (t) = cos[2 π (12.5)t] + cos[2 π (25)t]

Use fft to generate a DFT of these values and plot the results.

In Example 16.3

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Applied Numerical Methods With MATLAB For Engineers And Scientists

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Develop an M-file function that uses the fft function to generate a power spectrum plot. Use it

Question:

Apply the MATLAB fft function to determine the discrete Fourier transform for a simple sinusoid: f(t) = 5+ cos(2 (12.5)t) + sin(27 (18.75)t) Generate 8 equispaced points with At = 0.02 s. Plot the result versus frequency.

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Applied Numerical Methods With MATLAB For Engineers And Scientists

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