MATLAB: Finding a Signal from an noisy signal

Question

I am having an signal as displayed in the image the red signal is the input and the blue one is outut as we can see that we have six peaks obtained in the input (Red) signal and the same should be present in the output (Blue) signal. I want to find the the signals in the blue samples. Is there any kind of filter or code which I can apply to find the signals.

Please note that signals attached in the image are created using an CSV file which contains the amplitudes of the signals.

Answer 1

Simply use masking:

mask = redSignal > 0.1; % Logical index (mask) of where the red signal is higher than 0.1.
% Now replace those bad red signal locations with the good blue signal:
redSignal(mask) = blueSignal(mask);