ECG Annotation in matlab

Hello everyone,

How can I check the different annotation files of ECG database from physionet using matlab?

I have developed some algorithms to extract the peaks of T, P, and R waves. I need to check my results with what already they have in their website.

I found this code which returns back the R peaks. RECORD = 'nsrdb/16272' ANNOTATOR = 'atr'

% disp(['Loading 10 seconds of record ',RECORD,' ...']); data10 = rdsamp(RECORD, 'begin', '00:00:00', 'stop', '00:00:10');

% disp(['Loading 10 seconds of annotations from ',ANNOTATOR, ... ' for record ',RECORD,' ...']); anns10 = rdann(RECORD, ANNOTATOR, 'start', '00:00:00', 'stop', ... '00:00:10', 'concise');

% disp(['Finding the frequency of ',RECORD,' using wfdbdesc ...']); desc = wfdbdesc(RECORD, false); freq = desc.samplingFrequency;

% just a safety measure if freq == 0 freq = 1; end

% disp('Plotting the first signal in the record ...'); plot(data10(:,1)/freq, data10(:,2), 'b')

% disp('Plotting the annotations (as magenta diamonds) ...'); hold on; plot(anns10(:,2)/freq, data10(anns10(:,2)+1, 2), 'md', ... 'MarkerSize', 8); hold off;

% xlabel('time (s)'); ylabel('ECG amplitude (mV)'); legend('ECG', 'atr'); xlim()

What about if I want to check other features?

Any thoughts?