write matlab code that will extract the peak-to-peak amplitude of the m-wave and h-reflex waveforms at each stimulation step with filtering and generating the variable in matlab no butter filter in matlab

main.m
% Define filter coefficients
fL = ...; % low-pass filter frequency in Hz
fH = ...; % high-pass filter frequency in Hz
fs = ...; % sampling frequency in Hz
[b, a] = butter(4, [fL, fH]/(fs/2), 'bandpass');

% Apply the filter to M-wave and H-reflex signals
Mwave_filtered = filter(b, a, Mwave);
Href_filtered = filter(b, a, Href);

% Initialize peak-to-peak amplitudes vectors
Mwave_ppa = zeros(size(Mwave,2), 1);
Href_ppa = zeros(size(Href,2), 1);

% Extract peak-to-peak amplitudes at each stimulation step
for i = 1:size(Mwave, 2)
    Mwave_ppa(i) = max(Mwave_filtered(:,i)) - min(Mwave_filtered(:,i));
    Href_ppa(i) = max(Href_filtered(:,i)) - min(Href_filtered(:,i));
end
677 chars
20 lines