Increased mat-file size with v7.3

Hi guys,

I am saving a Database in a mat-file. Now I'm at a point where Matlab suggests I should switch to v.73 because the file is too big or hast too many entries.

I switched it in my Code and run a test with a montly import. The file size now increased from 17MB to 620MB.

My Data is saved as a struct with some sub-strucures including cell arrays and double arrays.

I don't understand why my file gets so much bigger now. I thought compression was turned on by default on v7.3.

Are there any tipps what i should look after?

Here's my save code:

save(Data.mat,'Data','-v7.3');

Thanks for your help in advance!

Answer 1

[KSSV]

Read this. https://www.mathworks.com/matlabcentral/answers/15521-matlab-function-save-and-v7-3

[Walter Roberson]

And also http://www.mathworks.com/matlabcentral/answers/153759-save-v7-3-apparently-uses-no-compression-how-to-turn-it-on

[David Baitinger]

Thank you guys for the links. I'm playing around with HDF5 Files now and hope this helps. So far it looks like a big impromevement over the original save as -v7.3 command but the files are still larger than with only the save command.

I have turned compression on. Is there anything else to look into?

[KSSV]

There is option of Netcdf too....I feel Netcdf is more user friendly and easy.