Writing Compound Data to an Existing HDF5 file

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Simon
Simon 2012-7-24
I'm having difficulty adding a new compound dataset to an existing hdf5 file.
I get an error along the lines of:
***********************
Error using hdf5lib2 The HDF5 library encountered an error during execution of the 'H5Dcreate1' function, 'unable to create dataset'.
Error in H5D.create (line 40) id = H5ML.hdf5lib2('H5Dcreate', varargin{:} );
**************************
The easiest way to recreate this error is using the example script for writing MATLAB compound data to a hdf5 file on the hdfgroup.org website: http://www.hdfgroup.org/ftp/HDF5/examples/examples-by-api/matlab/HDF5_M_Examples/h5ex_t_cmpd.m
Basically, I run the script once so it create a file. Then I change
DATASET = 'DS1';
to
DATASET = 'DS2';
and
file = H5F.create(fileName);
to
file = H5F.open (fileName);
The aim is to create an identical dataset called DS2 inside of the same file as DS1. However, MATLAB throws the above error.
Any ideas what I'm doing wrong?

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采纳的回答

John
John 2012-7-25
You are opening the file in read-only mode, which is why the H5D.create call fails. Check the help for H5F.open, it has an example of what you need to do to modify your code.

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