Документация

function writeData(dataFile)
    % Create HDF5 file if does not already exist, and initialize dataset.
    if ~exist(dataFile,'file')
        % Create file access property list, set library version flags, and create the file.
        faplID = H5P.create('H5P_FILE_ACCESS');
        H5P.set_libver_bounds(faplID,'H5F_LIBVER_LATEST','H5F_LIBVER_LATEST');
        fileID = H5F.create(dataFile,'H5F_ACC_TRUNC','H5P_DEFAULT',faplID);
    
        % Create and write dataset.
        datatypeID = H5T.copy('H5T_NATIVE_DOUBLE');
        dataspaceID = H5S.create_simple(2,[25 25],[]);
        datasetID = H5D.create(fileID,'/peaks',datatypeID,dataspaceID,'H5P_DEFAULT');
        H5D.write(datasetID,'H5ML_DEFAULT','H5S_ALL','H5S_ALL','H5P_DEFAULT',NaN(25));

        % Close open resources.
        H5D.close(datasetID);
        H5S.close(dataspaceID);
        H5T.close(datatypeID);
        H5F.close(fileID);
    end

    % Open HDF5 file with support for SWMR write access and open dataset.
    fileID = H5F.open(dataFile,'H5F_ACC_RDWR|H5F_ACC_SWMR_WRITE','H5P_DEFAULT');
    datasetID = H5D.open(fileID,'/peaks');
    
    % Loop through writing Z data to file.
    for t = 0 : 0.05 : 15
        Z = exp(-0.15*t) * sin(10*t) * abs(peaks(25));
        H5D.write(datasetID,'H5ML_DEFAULT','H5S_ALL','H5S_ALL','H5P_DEFAULT',Z);
        
        % Flush data in the dataset after writing.
        H5D.flush(datasetID);
        pause(0.05);
    end

    % Close open resources.
    H5D.close(datasetID);
    H5F.close(fileID);

end

function readPlot3D(dataFile)
    % Open HDF5 file with for SWMR read access and open dataset.
    h5FileID = H5F.open(dataFile,'H5F_ACC_RDONLY|H5F_ACC_SWMR_READ','H5P_DEFAULT');
    datasetID = H5D.open(h5FileID,'/peaks');
    
    % Loop through reading Z data from file and 3D plotting it.
    hSurf = [];
    for t = 0 : 0.05 : 15
        % Refresh dataset before reading.
        H5D.refresh(datasetID);
        Z = H5D.read(datasetID,'H5ML_DEFAULT','H5S_ALL','H5S_ALL','H5P_DEFAULT');
        if isempty(hSurf)      
            % Create surface plot if not present.
            hSurf = surf(Z);
            zlim([-8 8]);
            caxis([-5 5]);
        else               
            % Update surface plot Z data otherwise.
            hSurf.ZData = Z;
        end
        pause(0.05);
    end
    
    % Close open resources
    H5D.close(datasetID);
    H5F.close(h5FileID);
end

function readLogger(dataFile)
    % Open HDF5 file with SWMR read access and open dataset.
    h5FileID = H5F.open(dataFile,'H5F_ACC_RDONLY|H5F_ACC_SWMR_READ','H5P_DEFAULT');
    datasetID = H5D.open(h5FileID,'/peaks');
    
    % Open log file for saving records.
    recordFileID = fopen('logs.txt','w');
    fprintf(recordFileID,'t,Zpeak\n');
    
    % Loop through reading Z data from the file and recording central value.
    for t = 0 : 0.05 : 15
        % Refresh dataset before reading.
        H5D.refresh(datasetID);
        Z = H5D.read(datasetID,'H5ML_DEFAULT','H5S_ALL','H5S_ALL','H5P_DEFAULT');
        idx = round(size(Z,1)/2);
        fprintf(recordFileID,'%.3f,%.3f\n',t,Z(idx,idx));
        pause(0.05);
    end
    
    % Close open resources.
    H5D.close(datasetID);
    H5F.close(h5FileID);
    fclose(recordFileID);
end