Wavelet Packet decomposition using CSV data file.

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Alcatraz HS
Alcatraz HS 2022-1-21
评论： malik elfarsi 2022-1-21
Ran in:
Hello guys,i'm trying to analyze this data using wavelets but changing the sampling frequency does not effect the result and it always gives the same analysis so i cant identify the frequency components of the data.
How can i associate the sampling frequency with the time of the data.
Any help is appriciated.
data=csvread('Datatest.csv',4);
time=data(:,1);
x=data(:,2);
fs = 1000;
level = 4;
wpt = wpdec(x,level,'db4');
plot(wpt)
figure;
grid on;
hold on;
[Spec,Time,Freq] = wpspectrum(wpt,fs,'plot');
xlabel('Time (secs)')
ylabel('Freq (Hz)')

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