Howtosignalprocessing
- How do you plot a spectrum in Matlab?
- How do you draw a frequency spectrum of a signal?
- How do you plot frequency domain?
How do you plot a 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.
How do you draw a frequency spectrum of a signal?
Frequency spectrum of a signal is the range of frequencies contained by a signal. For example, a square wave is shown in Fig. 3.5A. It can be represented by a series of sine waves, S(t) = 4A/π sin(2πft) + 4A/3π sin(2π(3f)t) + 4A/5π sin(2π(5f)t + …)
How do you plot frequency domain?
Frequency domain graphs
Frequency is plotted along the x-axis and amplitude is plotted along the y-axis. FFTs often look like a series of mountain peaks. The horizontal location of peaks indications which frequencies are strongly present in the sound. The valleys show which frequencies are absent.
