function varargout=rdann(varargin)
[ann,type,subtype,chan,num,comments]=rdann(recordName,annotator,C,N,N0,type)
Wrapper to WFDB RDANN:
http://www.physionet.org/physiotools/wag/rdann-1.htm
NOTE: The WFDB Toolbox uses 0 based index, and MATLAB uses 1 based index.
Due to this difference annotation values ('ann') are shifted inside
this function in order to be compatible with the WFDB native
library. The MATLAB user should leave the indexing conversion to
the WFDB Toolbox.
Reads a WFDB annotation and returns:
ann
Nx1 vector of the ints. The time of the annotation in samples
with respect to the fist sample in the signals in recordName.
To convert this vector to a string of time stamps see WFDBTIME.
type
Nx1 vector of the chars describing annotation type.
subtype
Nx1 vector of the chars describing annotation subtype.
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 or
in the current directory.
annotator
String specifying the name of the annotation file in the WFDB path or
in the current directory.
Optional Parameters are:
C
A 1x1 integer. Read only the annotations for signal C.
N
A 1x1 integer specifying the sample number at which to stop reading the
record file (default read all = N).
N0
A 1x1 integer specifying the sample number at which to start reading the
annotion file (default 1 = begining of the record).
type
A 1x1 String specifying the type of annotation to output (default is
empty, which gets all annotations).
Written by Ikaro Silva, 2013
Last Modified: January, 8, 2014
Version 1.0.4
Since 0.0.1
%Example 1- Read a signal and annotation from PhysioNet's Remote server:
[tm, signal]=rdsamp('challenge/2013/set-a/a01');
[ann]=rdann('challenge/2013/set-a/a01','fqrs');
plot(tm,signal(:,1));hold on;grid on
plot(tm(ann),signal(ann,1),'ro','MarkerSize',4)
%Example 2- Read annotation from the first 500 samples only
ann=rdann('mitdb/100','atr',[],500);
%Example 3- Read only a certain type of annotation
annV=rdann('mitdb/100', 'atr', [],[],[],'V');
See also wfdbtime, wrann