• Copyright (C) 2019 Qianqian Fang <q.fang at neu.edu>
• License: GNU General Public License version 3 (GPL v3) or 3-clause BSD license, see LICENSE*.txt
• Version: 0.5 (code name: Cinco)
• URL: http://github.com/fangq/eazyh5

EazyH5 is a fully automated, fast, compact and portable MATLAB object to HDF5 exporter/importer. It contains two easy-to-use functions - loadh5.m and saveh5.m. The saveh5.m can handle almost all MATLAB data types, including structs, struct arrays, cells, cell arrays, real and complex arrays, strings, and containers.Map objects. All other data classes (such as a table, digraph, etc) can also be stored/loaded seemlessly using an undocumented data serialization interface (MATLAB only).

EazyH5 stores complex numerical arrays using the composite data types in an HDF5 dataset. The real-part of the data are stored as Real and the imaginary part is stored as the Imag component. The loadh5.m automatically converts such data structure to a complex array.

Because HDF5 does not directly support 1-D/N-D cell arrays or struct arrays, EazyH5 converts these data structures into data groups with names in the following format

    ['/hdf5/path/.../varname',num2str(idx1d)]

where varname is the variable/field name to the cell/struct array object, and idx1d is the 1-D integer index of the cell/struct array. We also provide a function, regrouph5.m to automatically collapse these group/dataset names into 1-D cell/struct arrays after loading the data using loadh5.m. See examples below.

The EazyH5 toolbox can be installed using a single command

    addpath('/path/to/eazyh5');

where the /path/to/eazyh5 should be replaced by the unzipped folder of the toolbox (i.e. the folder containing loadh5.m/saveh5.m).

Example:

  a=struct('a',rand(5),'b','string','c',true,'d',2+3i,'e',{'test',[],1:5});
  saveh5(a,'test.h5');
  saveh5(a,'test2.h5','Root','rootname');

Example:

  data=loadh5('test.h5');

Example:

  a=struct('a1',rand(5),'a2','string','a3',true,'d',2+3i,'e',{'test',[],1:5});
  a(1).a1=0; a(2).a2='test';
  data=regrouph5(a)
  saveh5(a,'test.h5');
  rawdata=loadh5('test.h5')
  data=regrouph5(rawdata)

Please submit your bug reports, feature requests and questions to the Github Issues page at

https://github.com/fangq/eazyh5/issues

Please feel free to fork our software, making changes, and submit your revision back to us via "Pull Requests". EazyH5 is open-source and welcome to your contributions!