Wanted metlab code for median and mean frequency of EMG data

Metlab code for EMG data

[Jagruti Patel]

Want to find the mean and median frequency of data using METLAB coding

Answer 1

[charan]

Hi,

Mean Frequency is the "center of mass" of the spectrum, it is the average frequency weighted by power.

Median Frequency is the frequency that divides the spectrum into two halves with equal power.

These can be calculated from the power spectral density of the data. The power spectral density can be obtained by using the "fft" function and converting the signal into frequency domain and then computing power. You can also use the "pwelch" function in MATLAB to calculate the power spectral density. You can refer to the follwoing links for more information:

• fft : https://www.mathworks.com/help/matlab/ref/fft.html
• pwelch : https://www.mathworks.com/help/signal/ref/pwelch.html