How to assign time on x-axis in emd?

I am using the built in function emd(x), but I can't get the time periode I used for the signal, instead there are samples on the x-axis.

Can anyone help me with assigning time vector on the x-axis for emd?

Thanks in advance,

Answer 1

[Mathieu NOE]

hello

if you know your sampling frequency (Fs) of the original data , and the length of the data , it's fairly straithforward :

dt = 1/Fs;
time = (0:samples-1) * dt;

[Jan Ali]

Thanks Mathieu for the answer. I know the Fs and data length, but how can I plot the actual time in emd?

[Mathieu NOE]

hello

can you share your code ?

tx

[Jan Ali]

load(iHall); % a data file containing the signal

fs = 15384;

x = iHall(length(iHall)/900*726:length(iHall)/900*728); % Select part of signal (current waveform ) where transient occured

t = (0:length(x)-1)/fs + 726; % sample starts from 726s instead of 5083s

[imf,residual,info] = emd(x,'Interpolation','pchip','Display',1);

emd(x);

[Jan Ali]

Hello Mathieu again,

I am looking forward to getting your kind answer.

Thanks in advance,

[Mathieu NOE]

hello Jan

I thought the topic has already been answered - in another post (about the same exact question ??)

How to plot actual time on x-axis in emd - MATLAB Answers - MATLAB Central (mathworks.com)