h5disp

Display contents of HDF5 file

Syntax

h5disp(filename)

h5disp(filename,loc)

h5disp(filename,loc,mode)

h5disp(___,'TextEncoding','UTF-8')

Description

h5disp(filename) displays the metadata that describes the structure of the specified HDF5 file.

h5disp(filename,loc) displays the metadata for the specified location within the file.

h5disp(filename,loc,mode), where mode is 'min', displays only the group and dataset names. The default for mode is 'simple', which displays the dataset metadata and attribute values.

h5disp(___,'TextEncoding','UTF-8') forces object and attribute names to be treated as UTF-8-encoded text. This usage is unnecessary if the HDF5 file accurately specifies the use of UTF-8 encoding.

Examples

Metadata of HDF5 File

Create a 50-by-50 dataset with a chunk size of 5-by-5.

h5create('exampleFile2.h5','/exampleDataset',[50,50],'ChunkSize',[5 5])

Display the metadata of the HDF5 file. In this example, the HDF5 file contains one dataset within its root group. The attributes belonging to the dataset are displayed below its name.

h5disp('exampleFile2.h5')

HDF5 exampleFile2.h5 
Group '/' 
    Dataset 'exampleDataset' 
        Size:  50x50
        MaxSize:  50x50
        Datatype:   H5T_IEEE_F64LE (double)
        ChunkSize:  5x5
        Filters:  none
        FillValue:  0.000000

Attributes of Dataset in HDF5 File

Display the attributes of a dataset /g4/world in the file example.h5. If you specify the full path of a dataset in an HDF5 file, h5disp will only display the attributes of the dataset.

h5disp('example.h5','/g4/world')

HDF5 example.h5 
Dataset 'world' 
    Size:  36x19
    MaxSize:  36x19
    Datatype:   H5T_IEEE_F64LE (double)
    ChunkSize:  []
    Filters:  none
    FillValue:  0.000000

Display Mode

Display only group and dataset names by specifying the display mode 'min'.

h5disp('example.h5','/g4/world','min')

HDF5 example.h5 
Dataset 'world' 

Input Arguments

filename — File name

character vector | string scalar

File name, specified as a character vector or string scalar containing the name of an existing HDF5 file.

Depending on the location of your file, filename can take on one of these forms.

Location	Form
Current folder	Specify the name of the file in filename. Example: 'myFile.h5'
Other folders	If the file is not in the current folder or in a folder on the MATLAB® path, then specify the full or relative path name in filename. Example: 'C:\myFolder\myFile.h5' Example: 'myFolder\myFile.h5'
Remote Location	If the file is stored at a remote location, then filename must contain the full path of the file specified as a uniform resource locator (URL) of the form: scheme_name://path_to_file/my_file.ext Based on your remote location, scheme_name can be one of the values in this table. Remote Location scheme_name Amazon S3™ s3 Windows Azure® Blob Storage wasb, wasbs HDFS™ hdfs For more information, see Work with Remote Data. Example: 's3://bucketname/path_to_file/myFile.h5'

loc — Location in file

character vector | string scalar

Location in the file, specified as a character vector or string scalar containing the full path to a location in the file. To display the metadata for the entire file, specify '/' as the location. If loc is a group, h5disp displays all objects in the group.

mode — Display mode

'simple' (default) | 'min'

Display mode, specified as one of these values:

• 'simple' — Display dataset names and attribute values if the attribute is an integer, floating point, or a scalar string.

• 'min' — Display only group and dataset names.