How to use Moving average window used to detect the active segments for EMG signal given below to apply Feature Extraction methods on each segemnts

[tm,signal,Fs,labels]=rdmat('emg_neuropathym1');

samples=length(signal);

T=1/Fs;

t=0:samples-1;

figure

plot(t,signal)

xlabel('samples')

ylabel('Amplitude in mVolts')

title('Raw EMG data')

figure

plot(signal)

hold on;