How do I switch on compression when using 'save -v7.3'? This morning I ran into a problem using 'save'. For the first time I tried saving large variables which then forced me to use 'v7.3'. I thought this might be the end of it but apparently not.
Two problems with v7.3:
- It's VERY slow
- Files are HUGE compared to normal saving, which might explain why reading/writing is so slow
Externally zipping the produced *.mat file results in a file about the size of the one produced by just using 'save'. For example:
The first file is 778kB in size, the second one a whopping 11.4MB. Zipping the 11.4MB file results in a 228kB file, so theres much room for improvement. While 11MB could be handled, the same happens of course to larger variables. I just edited one of my physics simulations with many multidimensional arrays. Saving via the normal method gives a 500MB file, doing the same using '-v7.3' gives me a 6.3GB file. Zipping this one gives me a 480MB file. This is unacceptable, it can't be how this was intended to be used.
So apparently using 'save -v7.3' just doesn't compress the file. This makes no sense to me. Escpecially if this was specifically implemented to be used to save large variables, why is the compression not on?
How do I switch this on? Going through the documentation, I haven't found an option.