select_partial_dataset_cpp11.cpp

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/*
 *  Copyright (c), 2017, Adrien Devresse
 *
 *  Distributed under the Boost Software License, Version 1.0.
 *    (See accompanying file LICENSE_1_0.txt or copy at
 *          http://www.boost.org/LICENSE_1_0.txt)
 *
 */
#include <functional>
#include <iostream>
#include <string>
#include <vector>
 
#include <highfive/H5File.hpp>
#include <highfive/H5DataSet.hpp>
#include <highfive/H5DataSpace.hpp>
 
const std::string FILE_NAME("select_partial_example.h5");
const std::string DATASET_NAME("dset");
 
// Create a dataset name "dset" of double 4x6
//
int main(void) {
    using namespace HighFive;
    try {
        // Create a new file using the default property lists.
        File file(FILE_NAME, File::ReadWrite | File::Create | File::Truncate);
 
        // we have some example values in a 2D vector 2x5
        std::vector<std::vector<double>> values = {
            {1.0, 2.0, 4.0, 8.0, 16.0}, {32.0, 64.0, 128.0, 256.0, 512.0}};
 
        // let's create a dataset of this size
        DataSet dataset =
            file.createDataSet<double>(DATASET_NAME, DataSpace::From(values));
        // and write them
        dataset.write(values);
 
        // now we read back 2x2 values after an offset of 0x2
        std::vector<std::vector<double>> result;
        dataset.select({0, 2}, {2, 2}).read(result);
 
        // we print out 4 values
        for (auto i : result) {
            for (auto j : i) {
                std::cout << " " << j;
            }
            std::cout << "\n";
        }
 
    } catch (Exception& err) {
        // catch and print any HDF5 error
        std::cerr << err.what() << std::endl;
    }
 
    return 0; // successfully terminated
}