How to filter high amplitude signals ?

Hello, I have some signals and I want to only keep high amplitude signals. All of my signals have a sine wave shape, some might have glitches. This is what I want to achieve:

!I have 39 signals

c=[]

for i = 1:39

if max(signal(i))> Amplitudelimit

c(1,end+1)=i

end

end

Does matlab have built in function for this operation?

Thank you.

Answer 1

[Askic V]

I think this can do just fine:

rand_arr = 1+2*randn(100,1);

plot(rand_arr, 'o');
hold on
amp_level = 2; % treshold
filt_arr = rand_arr;
filt_arr(filt_arr < amp_level) = 0;
plot(filt_arr, 'r*');
ylim([-10 10]);

[Jingqi Sun]

Thank you so much!