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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://www.hdfgroup.org/licenses. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* This example illustrates how to create a dataset in a group.
* It is used in the HDF5 Tutorial.
*/
#include "hdf5.h"
#define FILE "groups.h5"
int
main()
{
hid_t file_id, group_id, dataset_id, dataspace_id; /* identifiers */
hsize_t dims[2];
herr_t status;
int i, j, dset1_data[3][3], dset2_data[2][10];
/* Initialize the first dataset. */
for (i = 0; i < 3; i++)
for (j = 0; j < 3; j++)
dset1_data[i][j] = j + 1;
/* Initialize the second dataset. */
for (i = 0; i < 2; i++)
for (j = 0; j < 10; j++)
dset2_data[i][j] = j + 1;
/* Open an existing file. */
file_id = H5Fopen(FILE, H5F_ACC_RDWR, H5P_DEFAULT);
/* Create the data space for the first dataset. */
dims[0] = 3;
dims[1] = 3;
dataspace_id = H5Screate_simple(2, dims, NULL);
/* Create a dataset in group "MyGroup". */
dataset_id = H5Dcreate2(file_id, "/MyGroup/dset1", H5T_STD_I32BE, dataspace_id, H5P_DEFAULT, H5P_DEFAULT,
H5P_DEFAULT);
/* Write the first dataset. */
status = H5Dwrite(dataset_id, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, dset1_data);
/* Close the data space for the first dataset. */
status = H5Sclose(dataspace_id);
/* Close the first dataset. */
status = H5Dclose(dataset_id);
/* Open an existing group of the specified file. */
group_id = H5Gopen2(file_id, "/MyGroup/Group_A", H5P_DEFAULT);
/* Create the data space for the second dataset. */
dims[0] = 2;
dims[1] = 10;
dataspace_id = H5Screate_simple(2, dims, NULL);
/* Create the second dataset in group "Group_A". */
dataset_id =
H5Dcreate2(group_id, "dset2", H5T_STD_I32BE, dataspace_id, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
/* Write the second dataset. */
status = H5Dwrite(dataset_id, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, dset2_data);
/* Close the data space for the second dataset. */
status = H5Sclose(dataspace_id);
/* Close the second dataset */
status = H5Dclose(dataset_id);
/* Close the group. */
status = H5Gclose(group_id);
/* Close the file. */
status = H5Fclose(file_id);
}
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