     Nx1 vector of the chars describing annotation subtype. 
       For a list of standard annotation codes used by PhyioNet, please see:
             http://www.physionet.org/physiobank/annotations.shtml

 chan
       Nx1 vector of the ints describing annotation subtype.

 num
       Nx1 vector of the ints describing annotation NUM.

 comments
       Nx1 vector of the cells describing annotation comments.


 Required Parameters:

 recorName
       String specifying the name of the record in the WFDB path o