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The following example uses the groups.h5 file that is created by the HDF5 Introductory Tutorial example h5_crtgrpar.c. To display  dset1  in the groups.h5 file below, specify dataset  /MyGroup/dset1 . The -H option is used to suppress printing of the data values:

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You can obtain the h5ex_d_gzip.c program that created this file, as well as the file created, from the HDF5 C Examples by API page.

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dh5ls
dh5ls
h5ls

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For a detailed understanding of how selections works, see the H5SselectH5S_hyperslabSELECT_HYPERSLAB API in the HDF5 Reference Manual.

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The following datatypes are discussed, using the output of h5dump with HDF5 files from the HDF5 C Examples by API page:

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This dataset is much more complex. Also note that subsetting cannot be done on Array datatypes.

See this FAQ for more information on the Array datatype.

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An example of a Region Reference dataset ( h5ex_t_regref.h5 ) can be found on the C Examples by API page, under Datatypesunder Datatypes. If you examine this dataset with h5dump you will see that  /DS1  is a Region Reference dataset as indicated by its datatype, highlighted in bold below:

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  • A selection of four individual elements in dataset  /DS2 :   (0,1), (2,11), (1,0), (2,4) 
    See the H5SselectH5S_elementsSELECT_ELEMENTS API in the HDF5 User's Guide for information on selecting individual elements.

  • A selection of these blocks in dataset  /DS2 : (0,0)-(0,2), (0,11)-(0,13), (2,0)-(2,2), (2,11)-(2,13) 
    See the H5SselectH5S_hyperslabSELECT_HYPERSLAB API in the HDF5 User's Guide for how to do hyperslab selection.

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For more information on selections, see the tutorial topic on Reading From or Writing To a Subset of a Dataset. Also see the View Dataset Subset tutorial topic on using h5dump to view a subset.

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