processing

 Data processing in the BIOSIG toolbox, 
 This functions can be used as template as well as a wrapper 
 around different signal processing methods.  

 [Y,Zf] = processing(MODE,X,Zi)

    X input signal 
    Zi input status (optional), 
    initial condition
    if empty or not available, this initializes the method
    Y  output signal    
    Zf final condition 
    MODE is a struct and determines the signal processing method

    MODE =
    {'ECG_envelope',Fs}       used for QRS-detection [1]
    {'ECG_envelope',Fs,Threshold}  used for QRS-detection [1]
        'xyz'        -none-    


 Reference(s):
 [1] M.-E. Nygards, L. S�nmo, Delineation of the QRS complex using the envelope of the e.c.g
         Med. & Biol. Eng. & Comput., 1983, 21, 538-547.