title: ECG Live Monitoring/Visualization + Data conversion on Matlab
body: <p>I am working on ECG project for biometric identification: I use Arduino + Olimex ECG/EKG Shield and transmit the data to MatLab. </p>
  
  <p>I am facing two issues:</p>
  
  <ol>
  <li>Monitoring on real time: The X-Axis scale changes automatically and will compress the ECG after long time. I want to visualize a specific view so QRS complexes will be clearly visual. Any generic code?</li>
  <li>Getting real voltage values: Analog.read() on Arduino converts voltages from 0-5 to 0..1023 and then we send them via serial communication. On Matlab, ECG does not have specific min and max to get the real values of the voltages to extract the characteristics. Any ideas about how that could be done.</li>
  </ol>
  
  <p>Thank you so much in advance.
  Waiting for your replies.</p>
  
  <p>Kind regards,
  Badreddine</p>