Load Mat File In Octave

Octave s default so called mat file format is not a binary mat file at all it is in fact a text file format that octave developed for itself.

Load mat file in octave. Default this proprietary text format is not and never has been compatible with any of the publicly documented mat binary file formats. The save and load commands allow data to be written to and read from disk files in various formats. If filename has no extension that is no text after a period load looks for a file named filename mat if filename has an extension other than mat the load function treats. Octave failed to read it both with plain load quad3 mat and also with load mat binary quad3 mat inspection of the file showed matlab 5 0 at the head.

Here s a link that might be a good start. This is explained in the octave documentation. 14 1 3 simple file i o. Likewise there are many ways to load files into the workspace to load a saved mat file type.

Force octave to assume the file is in matlab s version 6 or 7 binary format. Bottom line is that you can say. A double array is returned. Force octave to assume the file is in the binary format written by matlab version 4.

The default format of files written by the save command can be controlled using the functions save default options and save precision. I ve done this before and it was not difficult but was time consuming. This corresponds to the load documentation in matlab. The file must be in a recognized directory usually your current directory but at least one for which the path has been set.

Load mymatfile mat right at the octave prompt. Save the data in octave s text data format. However i think some sort of workaround is needed for being able to load existing mat files that trigger such issue so octave users can access the rest of the data ideally informing the user about what variables empty function handles are missing and why. Saving with save mat7 binary or save v7 and loading with load mat also works but a struct is created in matlab.

Name of file specified as a character vector or string scalar. Default this proprietary text format is not and never has been compatible with any of the publicly documented mat binary file formats. Saving with save v7 in octave and simply load in matlab did not work. Save the data in octave s text data format.

Force octave to assume the file is in octave s text format. Saving with save ascii and simply load in matlab however did work. Save dlmwrite csvwrite fwrite. As an example the following code creates a 3 by 3 matrix and saves it to the file myfile mat.

Not sure which version of mat file you might have or whether octave keeps up with the latest matlab formats. In case you wind up having to write code to read the mat file ever. If you do not specify filename the load function searches for a file named matlab mat. This is the first time i ve had octave fail to be matlab binary compatible.

Octave s default so called mat file format is not a binary mat file at all it is in fact a text file format that octave developed for itself.