Bandpass filter of set of Data

Question

Abdullah Jarah 2021-4-20

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https://ww2.mathworks.cn/matlabcentral/answers/807457-bandpass-filter-of-set-of-data

回答： Mahesh Taparia 2021-6-3

Hello All,

I want to filter some seismic data I have like an array (27*4352) elements and I want to filter this data with Pass-Band filter so only Frequency between 100-2000 Hz will access I was reading a lot of codes and functions like Butterworth or filter(filter) that could help but I'm not able to perform the filter untill now? any suggestions to do that!

I use trying something but not sure!

%addpath('~/segymat1.6')

% read the data set in mtx files

filename = ('shot_1.mtx')

seismogram = readSeismogram(filename);

DT= 0.00003125;

T=1*DT:DT:size(seismogram,2)*DT;

Fs = 1/DT;

T = 0.135;

ns=round(T/DT);

% design filter

[b_pass, a_pass] = butter(2,[100,2000]/(Fs/2), 'bandpass');

%freqz(b_pass, a_pass)

plot(filtfilt(b_pass, a_pass, seismogram));

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Answer 1

Mahesh Taparia 2021-6-3

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https://ww2.mathworks.cn/matlabcentral/answers/807457-bandpass-filter-of-set-of-data#answer_715785

Hi

You can use 'bandpass' function to apply a bandpass filter to your data. For more information you can refer its documentation here. Hope it will help.