How do i separate data?

Hello everyone I attached data file. I want to separate data at interval of 20. How do this? Fs=20000 Data is time series.

[Cris LaPierre]

Interval of 20 what? Seconds? Rows?

[Fatima Bm]

Seconds

[Adam Danz]

What's the sampling frequency and what's Fs? If Fs=20000 is Hz, that answers my questions.

[Fatima Bm]

Yes, fs=20000Hz is sampling frequency

[Adam Danz]

That means there are 20000 samples per second. If you want every 20 seconds, that's the same as every 20*fs samples which is what my answer does.

[Fatima Bm]

Ok, thanks. I ran the code but I didn't get a result

Answer 1

[Adam Danz]

Assuming fs is the sampling frequency in Hz,

load('06-11_36.mat')
resampleInteval = 20;  % seconds
dataResampled =  data(1 : fs*resampleInteval : end);

Alternatively, see resample() which offers additional interpolation methods.

[Fatima Bm]

Thank you