Calculate Frequency/Period from Output of a Maximum Entropy Spectrum MATLAB function

1. How do you calculate entropy of a signal in Matlab?
2. How do you calculate spectral entropy?
3. How to calculate power spectrum matlab?

How do you calculate entropy of a signal in Matlab?

Entropy is defined as -sum(p. *log2(p)) , where p contains the normalized histogram counts returned from imhist .

How do you calculate spectral entropy?

To compute the instantaneous spectral entropy given a time-frequency power spectrogram S(t,f), the probability distribution at time t is: P ( t , m ) = S ( t , m ) ∑ f S ( t , f ) . Then the spectral entropy at time t is: H ( t ) = − ∑ m = 1 N P ( t , m ) log 2 P ( t , m ) .

How to calculate power spectrum matlab?

p = pspectrum( x , fs ) returns the power spectrum of a vector or matrix signal sampled at a rate fs . p = pspectrum( x , t ) returns the power spectrum of a vector or matrix signal sampled at the time instants specified in t .