MATLAB: How to get the sum of the maximum absolute amplitudes located in the positive and negative sides of Y-axis of a signal

Question

I'm working on MUAP signal and I dont know how to get the maximum of its absolute amplitudes located in the positive and negative sides of Y-axis.

Answer 1

Regardless of sign, the amplitude is:

signal = ...;                           % MUAP Vector
amp_max = max(signal) - min(signal);

Definition: MUAP is the ‘motor unit action potential’ in electromyography.