how to convert list by Hilbert Huang Transform?

I want to convert my list ls=[2,5,3,1,7] to a list of frequencies by Hilbert Huang Transform ?

I couldn't find any code Matlab to fix it.

Answer 1

[Vinay]

Hi Laila,

The ‘emd’ function in the MATLAB decomposes the signal into Intrinsic mode function,which represents the oscillatory modes present in the data.

The ‘hht’ function computes the instantaneous frequency and amplitude of each IMF and spectral analysis of the signal is obtained representing a time-frequency-energy representation of the signal.

The following code snippet computes the spectral diagram of the given signal using the Hilbert Huang Transform.

% Define the list
ls = [2, 5, 3, 1, 7];

% Perform Empirical Mode Decomposition
[imf,residual,info] = emd(ls)
% Spectral analysis using the HHT 
hht(imf,20)

Kindly refer to the below documentations of “emd” and “hht” for more details:

"emd”:https://www.mathworks.com/help/releases/R2023b/signal/ref/emd.html

“hht” : https://www.mathworks.com/help/releases/R2023b/signal/ref/hht.html