[svn-r3561] add to tutorial
Purpose:
[is this a bug fix? feature? ...]
Description:
[describe the bug, or describe the new feature, etc]
Solution:
[details about the changes, algorithm, etc...]
[Please as detail as you can since your own explanation is
better than others guessing it from the code.]
Platforms tested:
[machines you have tested the changed version. This is absolute
important. Test it out on at least two or three different platforms
such as Big-endian-32bit (SUN/IRIX), little-endian-32(LINUX) and
64-bit (IRIX64/UNICOS/DEC-ALPHA) would be good.]
This commit is contained in:
Barbara Jones
199
doc/html/Tutor/examples/hyperslab.f90
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199
doc/html/Tutor/examples/hyperslab.f90
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!
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! This example shows how to write and read a hyperslab.
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!
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PROGRAM SELECTEXAMPLE
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USE HDF5 ! This module contains all necessary modules
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IMPLICIT NONE
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CHARACTER(LEN=7), PARAMETER :: filename = "sdsf.h5" ! File name
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CHARACTER(LEN=8), PARAMETER :: dsetname = "IntArray" ! Dataset name
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INTEGER(HID_T) :: file_id ! File identifier
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INTEGER(HID_T) :: dset_id ! Dataset identifier
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INTEGER(HID_T) :: dataspace ! Dataspace identifier
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INTEGER(HID_T) :: memspace ! memspace identifier
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INTEGER(HSIZE_T), DIMENSION(3) :: dimsm = (/7,7,3/) ! Dataset dimensions
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! in memory
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INTEGER(HSIZE_T), DIMENSION(2) :: dims_out ! Buffer to read in dataset
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! dimesions
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INTEGER(HSIZE_T), DIMENSION(2) :: dimsf = (/5,6/) ! Dataset dimensions.
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INTEGER(HSIZE_T), DIMENSION(2) :: count = (/3,4/)
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! Size of the hyperslab in the file
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INTEGER(HSIZE_T), DIMENSION(2) :: offset = (/1,2/)
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!hyperslab offset in the file
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INTEGER(HSIZE_T), DIMENSION(3) :: count_out = (/3,4,1/)
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!Size of the hyperslab in memory
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INTEGER(HSIZE_T), DIMENSION(3) :: offset_out = (/3,0,0/)
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!hyperslab offset in memory
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INTEGER, DIMENSION(5,6) :: data ! Data to write
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INTEGER, DIMENSION(7,7,3) :: data_out ! Output buffer
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INTEGER :: dsetrank = 2 ! Dataset rank ( in file )
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INTEGER :: memrank = 3 ! Dataset rank ( in memory )
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INTEGER :: rank
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INTEGER :: i, j, k
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INTEGER :: error, error_n ! Error flags
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!
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! Write data to the HDF5 file.
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!
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!
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! Data initialization.
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!
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do i = 1, 5
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do j = 1, 6
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data(i,j) = (i-1) + (j-1);
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end do
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end do
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!
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! 0, 1, 2, 3, 4, 5
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! 1, 2, 3, 4, 5, 6
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! 2, 3, 4, 5, 6, 7
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! 3, 4, 5, 6, 7, 8
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! 4, 5, 6, 7, 8, 9
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!
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!
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! Initialize FORTRAN predefined datatypes
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!
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CALL h5open_f(error)
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!
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! Create a new file using default properties.
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!
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CALL h5fcreate_f(filename, H5F_ACC_TRUNC_F, file_id, error)
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!
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! Create the data space for the dataset.
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!
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CALL h5screate_simple_f(dsetrank, dimsf, dataspace, error)
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!
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! Create the dataset with default properties.
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!
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CALL h5dcreate_f(file_id, dsetname, H5T_NATIVE_INTEGER, dataspace, &
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dset_id, error)
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!
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! Write the dataset.
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!
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CALL h5dwrite_f(dset_id, H5T_NATIVE_INTEGER, data, error)
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!
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! Close the dataspace for the dataset.
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!
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CALL h5sclose_f(dataspace, error)
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!
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! Close the dataset.
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!
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CALL h5dclose_f(dset_id, error)
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!
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! Close the file.
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!
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CALL h5fclose_f(file_id, error)
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!
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! This part of the code reads the hyperslab from the sds.h5 file just
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! created, into a 2-dimensional plane of the 3-dimensional dataset.
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!
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!
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! Initialize data_out array.
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!
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do i = 1, 7
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do j = 1, 7
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do k = 1,3
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data_out(i,j,k) = 0;
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end do
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end do
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end do
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!
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! Open the file.
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!
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CALL h5fopen_f (filename, H5F_ACC_RDONLY_F, file_id, error)
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!
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! Open the dataset.
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!
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CALL h5dopen_f(file_id, dsetname, dset_id, error)
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!
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! Get dataset's dataspace identifier.
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!
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CALL h5dget_space_f(dset_id, dataspace, error)
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!
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! Select hyperslab in the dataset.
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!
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CALL h5sselect_hyperslab_f(dataspace, H5S_SELECT_SET_F, &
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offset, count, error)
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!
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! Create memory dataspace.
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!
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CALL h5screate_simple_f(memrank, dimsm, memspace, error)
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!
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! Select hyperslab in memory.
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!
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CALL h5sselect_hyperslab_f(memspace, H5S_SELECT_SET_F, &
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offset_out, count_out, error)
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!
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! Read data from hyperslab in the file into the hyperslab in
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! memory and display.
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!
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CALL H5Dread_f(dset_id, H5T_NATIVE_INTEGER, data_out, error, &
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memspace, dataspace)
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!
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! Display data_out array
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!
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do i = 1, 7
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print *, (data_out(i,j,1), j = 1,7)
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end do
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! 0 0 0 0 0 0 0
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! 0 0 0 0 0 0 0
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! 0 0 0 0 0 0 0
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! 3 4 5 6 0 0 0
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! 4 5 6 7 0 0 0
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! 5 6 7 8 0 0 0
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! 0 0 0 0 0 0 0
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!
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!
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! Close the dataspace for the dataset.
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!
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CALL h5sclose_f(dataspace, error)
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!
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! Close the memoryspace.
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!
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CALL h5sclose_f(memspace, error)
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!
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! Close the dataset.
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!
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CALL h5dclose_f(dset_id, error)
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!
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! Close the file.
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!
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CALL h5fclose_f(file_id, error)
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!
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! Close FORTRAN predefined datatypes.
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!
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CALL h5close_f(error)
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END PROGRAM SELECTEXAMPLE
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