MATLAB Programming

Hierarchical Data Format (HDF4) Files
This example returns information about a sample HDF4 file included with
MATLAB:
info = hdfinfo('example.hdf')
info =
Filename: 'example.hdf'
SDS: [1x1 struct]
Vdata: [1x1 struct]
To get information about the data sets stored in the file, look at the SDS field.
Using hdfread to Import Data from an HDF4 File
To use thehdfread function, you must specify the data set that you want to
read. You can specify the filename and the data set name as arguments, or
you can specify a structure returned by the hdfinfo function that contains
this information. The following example shows both methods. For information
about how to import a subset of the data in a data set, see “Reading a Subset
of the Data in a Data Set” on page 7-55.
1 Determine the names of data sets in the HDF4 file, using the hdfinfo
function.
info = hdfinfo('example.hdf')
info =
Filename: 'example.hdf'
SDS: [1x1 struct]
Vdata: [1x1 struct]
To determine the names and other information about the data sets in
the file, look at the contents of the SDS field. The Name field in the SDS
structuregivesthenameofthedataset.
dsets = info.SDS
dsets =
7-53