How to read file '100.dat' and '100.atr' of MIT BIH DATABASE (PHYSIONET)?

Hi peoples,

I would like of know how do for read the files DATABASE (MIT BIH DATABASE). The own provides an script for read, but gives error. The script is: rddata.m site: http://www.physionet.org/physiotools/matlab/rddata.m. Could anyone help me?

Thanks

[Reid Kostenuk]

I had the same problem. You have to precisely specify the file path. You can read about specifying file paths here... https://www.mathworks.com/help/matlab/matlab_env/specify-file-names.html

Answer 1

[per isakson]

Your question ought to include

• a link to the data
• details on the error

However, I downloaded the data (100.dat,100.atr,100.hea) and changed the line

    PATH= 'M:\Profile\Desktop2k\MIT_CD\mitdb';

to match my download-folder. The program then worked nicely and produced a diagram.

[Explorer]

Okay, you changed the path but what function you used to read files mentioned above?

[per isakson]

Google propose: http://www.physionet.org/physiobank/database/mitdb/

[Explorer]

You did not get my question. Anyway, I find the way to read downloaded database here

[Susan]

@per isakson Could you please tell me in what function you set the PATH to the folder that contains the data (100.dat,100.atr,100.hea) ? By changing the path, do you mean changing

WFDB_PATH = []

in "wfdbloadlib.m" line 50 to

WFDB_PATH='M:\Profile\Desktop2k\MIT_CD\mitdb'

in your case?

I downloaded the data I want to read and exceuted the rdann.m file, However, I got the following error

Index exceeds Java array dimensions

Error in rdann (line 188)
    str=char(data(1));

Any help would be greatly appreciated. Thanks in advance!

Answer 2

[Martin Paralic]

% use WFDB Toolbox for MATLAB and Octave from

% https://www.physionet.org/physiotools/matlab/wfdb-app-matlab/

% First, ADD PATH in Matlab enviroment where your data are stored (100.dat, 100.hea, 100.atr)

% use function rdsamp() to read samples

% [signal,Fs,tm]=rdsamp(recordName,signaList,N,N0,rawUnits,highResolution)

[signal, fs, tm] = rdsamp('100');

% to read annotation use function rdann()

% [ann,anntype,subtype,chan,num,comments]=rdann(recordName, annotator, C, N, N0, AT)

[ann, anntype, subtype, chan, num, comments] = rdann('100','atr');

[Walter Roberson]

That WFDB location appears to now redirect to

https://www.physionet.org/content/wfdb-matlab/0.10.0/

Answer 3

[Vinícius]

Hi, the error that has been:

\n$> WORKING ON 100.hea ... ??? Error using ==> fgetl at 44 Invalid file identifier. Use fopen to generate a valid file identifier.

Error in ==> rddata at 38 z= fgetl(fid1);

[Matt Kindig]

Based on the error message, it sounds like fopen() failed. Are you sure that you're passing in the correct filename to fopen().

Try this:

dbstop if error  %turn on breakpoints at error

and now run your code. What is the value of the filename variable passed into the fopen() statement? Is this a valid file? Remember, if the file is not local to your working directory or is not on your path, you need to include the full (absolute) path for the file.

Answer 4

[laidi kamel]

hi, i tried to read the files 100.data and 100.atr using the fucntion rddaat.m but it doesn't work . please if you can help me to read this file.