cn_status = '6'
        
        if chr_name not in chr_list:
            continue
        
        rows = reader.get_rows( chr_name )
        
        segment_indices = np.logical_and( rows['position'] >= start, rows['position'] <= stop )
        
        segment_rows = rows[segment_indices]
        
        if len( segment_rows ) == 0:
            continue
        
        cncnt_file.add_rows( cn_status, chr_name, segment_rows )
    
    reader.close()
    cncnt_file.close()
        
if __name__ == "__main__":
    import sys
    
    args = Namespace()
    
    args.jcnt_file_name = sys.argv[1]
    args.cncnt_file_name = sys.argv[2]    
    args.segment_file_name = sys.argv[3]
    
    
    jcnt_to_cncnt( args )