select_partial_dataset_cpp11.cpp

/*
 *  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/highfive.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;

    // 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";
    }

    return 0;  // successfully terminated
}