C++ class to write HDF5 .mat files.

This is a small C++ class that lets you write matrices, vectors and values to a .mat file.

Description

This is a small C++ class that lets you write matrices, vectors and values to a .mat file. It is simple enough that you can easily modify it yourself.

The mat file format is simply an HDF5 file with a pointless header prepended. This class uses libhdf5 from here:

http://www.hdfgroup.org/HDF5/release/obtain5.html

to write the HDF5 file, and the prepends the header to it. Currently it reads the entire file back in and writes it all out again with the header, because I couldn't get the HDF5 library to append to an existing file. If anyone knows how I'd love to know!

The resulting files can be loaded in matlab using

load('/path/to/file.mat'); % Puts contents in main workspace.
s = load('/path/to/file.mat'); % Puts contents in s structure.

• MATLAB release: MATLAB 7.10 (R2010a)
• Other requirements: libhdf5 from http://www.hdfgroup.org/HDF5/release/obtain5.html

[Marcus]

Nice work!

Is it possible to make it write out nd-matrixes? I would need at least a 3d.

[Tim]

It definitely linked fine when I wrote it! Can you post the errors you get, and how you are building it?

[Ki]

Hello there, this is a good idea to write a wrapper to read/write mat with hdf5. But I found that it fail to link the hdf5 library in linux, so many undefined references found