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What version of the default layout format saves usage?

In Matlab, when using a function save, what determines the default layout format version (-v4, -v6, -v7, -v7.3) that is used?

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To find the default version for save, go to MATLAB preferences -> General -> MAT files. I installed it in MATLAB version 7.3 or later. If you want to see how to change it, see here .

I will just give a short example here for the sake of completeness:

a=randn(100,10);
save('saved_a.mat','-v7.3')  %or '-v7, -v6' for example

EDIT: I'm not sure what is the standard MAT file for each MATLAB version, since in my R2013b I had version 7 as the default version. It was supposed to be version 7.3.

, R2006b 7.3. 7 MATLAB 7 ( R14). 6 MATLAB 5. - 4. MAT .. .

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