A tutorial on using HDF5 files and a collection of MATLAB functions are available here:

http://www.rtxi.org/docs/RTXIh5.zip

http://www.rtxi.org/2010/tutorials/rtxi-hdf5-data-files/

It is no longer necessary to use the rtxi_hdf_matlabize utility if you are using these functions. These functions were re-written to use a low-level API to extract the dataset for synchronous channels rather than the “load” function to map the dataset to native MATLAB structures.