How to remove artifact signal from my data

Hi guys,

Hope everything is fine. I am working with some electric signal recordings and i want to remove some artifact signals from my data. I have two spikes: the big spikes, that i want to keep in the file, and the small spikes, that I want to remove from the data (I call this the artifact). Here a code that I use to plot the data:

fs = 48828.128; % my sample rate
t=[1/fs:1/fs:length(wav)/fs];  % to calculate the time (seconds) for x axis
plot(t,wav);
ylabel ('Amplitude (V)');
xlabel ('Time (s)');

I get a plot like this:

So, you guys knows how I can remove this small spikes from the data? Follows the datafile attached.

Thanks for your help.

Answer 1

[Kevin Chng]

Try, however, other might have better answer/solution for it.

load file1

fs = 48828.128; % my sample rate
t=[1/fs:1/fs:length(wav)/fs];  % to calculate the time (seconds) for x axis

wav(wav>0.06 & wav<0.1)=nan;
wav(wav<0.04 & wav>-0.03)=nan;
wav=fillmissing(wav,'linear');
plot(t,wav);
ylabel ('Amplitude (V)');
xlabel ('Time (s)');
xlim([1.7 1.8])

[Thiago Petersen]

Hi Kevin!

Your code works good in some way, but some small peaks still persists during the 15 seconds recording. What I really want is to delete all the small peaks from the recording (the 15 seconds).

[Kevin Chng]

You may play around with the range on small peak by following command. set them to nan, then link them up by linear interpolation. Will it work for you?

wav(wav>0.06 & wav<0.1)=nan;
wav=fillmissing(wav,'linear');