Problem in opening HDF5 file

I am new to HDF5 file format and there is a file I want to open. I simply followed what is given by mathworks example:

    hinfo = hdf5info('example.h5');
    dset = hdf5read(hinfo.GroupHierarchy.Groups(2).Datasets(1));

But MATLAB returned the following message: Improper index matrix reference.

   Improper index matrix reference.

   Error in HDF5_reader (line 8)
   dset = hdf5read(hinfo.GroupHierarchy.Groups(2).Datasets(1));

So what was the problem?

Answer 1

[Jeremy]

what is returned by hinfo? do you have 2 groups with a data channel in the second group?

Answer 2

[Imam]

The problem is I got this file from someone else and as I mentioned I am not very familiar with this file format. That's why I don't even know what are contained in this file, what are the name of variables stored there.

Answer 3

[Jeremy]

after to get hinfo, stop and see what is in that structure. It will list the group and dataset hiearchy.