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Get spectrogram matrix without specgram in MatLab

Get spectrogram matrix without specgram in MatLab
  1. How do you find the spectrogram in Matlab?
  2. How do you find the frequency spectrum in Matlab?

How do you find the spectrogram in Matlab?

s = spectrogram( x ) returns the Short-Time Fourier Transform (STFT) of the input signal x . Each column of s contains an estimate of the short-term, time-localized frequency content of x . The magnitude squared of s is known as the spectrogram time-frequency representation of x [1].

How do you find the frequency spectrum in Matlab?

In MATLAB®, the fft function computes the Fourier transform using a fast Fourier transform algorithm. Use fft to compute the discrete Fourier transform of the signal. y = fft(x); Plot the power spectrum as a function of frequency.

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