Import .mat File out of Octave into Matlab

Hello

I have been in contact with Mathworks Support Andreas Goser about importing a .mat file out of Octave into Matlab. He approved of handling this question even though there is a connection with using open source.

The question is, How can I import a .mat file which was compiled in Octave into Matlab? I Need to perform a functionfit on the Basis of measured data in Octave, since I do not have the optim-package in Matlab, and want to Import the function Parameters into Matlab.

Thank you in advance for help.

[Jan]

I do not understand the question. You can import a MAT file simply by using load. What is the "optim-package in Matlab"? To import function parameters an binary file might be much easier. So what exactly do you want to solve?

[MarionJ]

It is not possible to load a .mat file which was created in Octave. Is it? It did not work with me at least... I cannot use lsqcurvefit, since I do not have the respective package in Matlab. So I perform the functionfit with lsqcurvefit in Octave and want to Import the function Parameters into Matlab. It would be so simple with a .mat file...

Answer 1

[Jan]

I do not know Octave. So please explain in which format "the function parameters" are available in Octave. If this is a number of double values, a binary file is trivial.

Nevertheless, the documentation (found by Google "Ocatve write MAT file") seems to imply, that Octave can write v4, v6 and v7 MAT files:

https://www.gnu.org/software/octave/doc/v4.2.0/Simple-File-I_002fO.html

Simply try a save -v7 in Octave and a load in Matlab.

[EDITED] Sorry, I did not see Stephen's answer before I've submitted this one.

[MarionJ]

Saving with save -v7 in Octave and simply load in Matlab did not work. Saving with save -ASCII and simply load in Matlab however did work. A 'double' array is returned. Saving with save -mat7-binary or save -v7 and loading with load '-mat' also works, but a struct is created in Matlab. This corresponds to the load documentation in Matlab: https://de.mathworks.com/help/matlab/ref/load.html Thank you for the hint.