Hello experts,

I got this piece of code for the lowpass filter on the internet, my question is what should I change in the code if I have two variables named A and B imported from an Excel file(containing a large set of data) into MATLAB in order to filter out the noise in the signal?

Thank you in advance

>> Fs = 100; >> T = 1/Fs; >> t = 0:T:1-T; >> S = sin(2*pi*10*t); >> noise = 0.5*randn (size(t)); >> x = s + noise; >> plot (x) >> shg >> plot (x) d = designfilt('lowpassfir', 'Filterorder', 5, 'Cutofffrequency', 11, SampleRate', Fs); >> y = filter (d, x); >> plot (y) >> plot(x); hold on; plot (y) >> d = designfilt('lowpassfir', 'Filterorder', 8, 'CutoffFrequency', 10, 'SampleRate', Fs); >> y = filter (d, x); >> plot (x); hold on; plot (y) >> plot (x); hold on; plot (y) >> y = filtfilt(d, x); >> plot (x); hold on; plot(y) >> mean(y) >> Fs = 100; >> T = 1/Fs; >> t = 0:T:1-T; >> S = sin(2*pi*10*t); >> noise = 0.5*randn (size(t)); >> x = s + noise; >> plot (x) >> shg >> plot (x) d = designfilt('lowpassfir', 'Filterorder', 5, 'Cutofffrequency', 11, SampleRate', Fs); >> y = filter (d, x); >> plot (y) >> plot(x); hold on; plot (y) >> d = designfilt('lowpassfir', 'Filterorder', 8, 'CutoffFrequency', 10, 'SampleRate', Fs); >> y = filter (d, x); >> plot (x); hold on; plot (y) >> plot (x); hold on; plot (y) >> y = filtfilt(d, x); >> plot (x); hold on; plot(y) >> mean(y)