Import MATLAB data (.mat) in GRASS

Question

I have a file from MATLAB in (.mat) format. I want to import this in GRASS GIS, but I get the following warning.

m files contain matlab scripts no data. You can't open them in GRASS. — Zoltan, Commented Dec 3, 2020 at 7:45

radouxju · Accepted Answer · 2020-12-03 11:31:32Z

1

The .m file is not readable by GRASS: you need to save your data in a .mat file

in matlab (note that I force the use of version 4):

save('yourfile.mat','-v4')

answered Dec 3, 2020 at 11:31

radouxju

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Thanks, my friend. You are right, of course I also meant the .mat format, but I mistyped the .m (as shown in the image above.) What do you mean by (-v4)? Explain a little.Thanks for your guidance
– saeed
Commented Dec 3, 2020 at 17:32
by default the mat file will be exported in the latest Matlab version, but the grass tool needs version 4 (an older version)
– radouxju
Commented Dec 4, 2020 at 8:58

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sermomon · Accepted Answer · 2022-05-17 14:47:06Z

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You can use the SciPy scipy.io to read and write .mat files using the functions loadmat and savemat in Python. https://docs.scipy.org/doc/scipy/reference/io.html

answered May 17, 2022 at 14:47

sermomon

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