eigen-matio

Eigen header-only library for reading and writing Eigen matrices to/from matlab data files, using the 'matio' library as a backend. It would be nice to incorporate this with Eigen someday.

This is a fork of https://github.com/GiulioRomualdi/eigen-matio/tree/install_package

Usage

there are two interfaces:

• a MatioFile() class
• bare functions that hide the MatioFile() class

Using the bare functions:

#include "Eigen/Core"
#include "Eigen/Dense"
#include ".../MATio"

using namespace Eigen;

Matrix3f ff;

// read it into floats
read_mat("data.mat", "ff", ff);
std::cout << "ff=" << ff << std::endl;

// write it out as doubles
write_mat("data.mat", "dd", ff.cast<double>());

Using the MatioFile class, potentially more efficient:

#include "Eigen/Core"
#include "Eigen/Dense"
#include ".../MATio"

using namespace Eigen;

MatioFile file("data.mat");

Matrix3f ff;

// read it into floats
file.read_mat("ff", ff);
std::cout << "ff=" << ff << std::endl;

ff = Matrix3f::Random();

// write it out as doubles
file.write_mat("dd", ff.cast<double>());

Contributing

All contributions welcome! (With two caveats: they must be MPL2 licensed, and maintain the same code formatting.)

TODO

• error checking
• gather error messages from matio library
• sparse matrix support
• struct and cell support, read/write & parse
• some testing, any testing!
• test against matio-1.3.4(?) because still shipping with RH6
• eventually submit to Eigen for inclusion in unsupported(?)

License

Mozilla 2.0, like the rest of Eigen.

To install

mkdir build
cd build
cmake ..
sudo make install

Read Test (linux platforms)

• Tests that MATio can read 1D and 2D arrays of real and complex doubles
• From the test directory, run build.sh
• Then run ./matio_read_test
• Should produce the following output

--------
r14
0.859442 0.805489 0.576722 0.182922
--------
r41
0.479922
0.904722
0.609867
0.617666
--------
r42
 0.903721   0.19781
 0.890923 0.0305409
 0.334163  0.744074
 0.698746  0.500022
--------
c14
(0.99715,-0.0754396)  (0.972018,0.234904)  (0.750809,-0.66052) (0.855213,-0.518277)
--------
c41
	(0.0632169,0.998)
 (0.756359,-0.654156)
  (0.983814,0.179192)
(-0.997988,0.0634089)
--------
c42
(-0.427325,-0.904098) (-0.568524,-0.822667)
   (0.65396,0.756529)  (-0.99933,0.0365981)
  (-0.1798,-0.983703)  (0.181525,-0.983386)
  (0.783322,0.621616) (-0.217916,-0.975968)