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please help about butterworth filter
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if true
% code
endhi
bandpass filter function returns NaN in some samples:
[a,b]=butter(4,[8 30]/(125/2) ,'bandpass'); filtered_signals=filter(a,b,x);
x: 5000 rows and 2 columns
I solved that by filtering the data in blocks(32 samples). the result was not the same but when i increased the samples to 320 i got the same result. Is it true to solve NaN problem.
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