Bigger than 2GB Data Storage

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Erdem Altuntac
Erdem Altuntac 2018-2-7
评论： Julia 2024-10-29，23:47
Hello,
I`m a 2016B user. This version complains about my synthetic data storage and says that `For variables larger than 2GB use MAT-file version 7.3 or later.`. I cannot obtain higher version. Any idea on how to store big data?
Thanks in advance
  2 个评论
Adam
Adam 2018-2-7
You would probably be better splitting your data into chunks if that is possible. Saving large files to v7.3 can be very bad in terms of performance.
Jan
Jan 2018-2-7
The message is clear already: All you have to do is to append the -v7.3 flag to your save command (see Kai's answer) or to set this as default in the preferences.

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Kai Domhardt
Kai Domhardt 2018-2-7
Take from the reference and tested with Matlab R2016b:
save('myFile.mat', 'Variablename', '-v7.3')
will save your variable ( > 2GB ), provided you are running on an 64-bit system
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Julia
Julia 2024-10-29，23:47
I am having the same issue and am running MATLAB R2024a on a 64 bit PC. The .mat file I have is output from Dymola (not originally made in MATLAB) and contains five small variables and one large variable (2-3GB). It is not v7.3, but I can't see what version it is. The solution above seems like it saves the mat file to the 7.3 version if it has been successfully loaded into MATLAB, but I can't load my large variable into MATLAB in the first place, even with matfile() which only seems to accept v7.3. Thus when I try to save it, it erases the large variable completely. Do you have any insight into how to load the data into MATLAB considering this?

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Steven Lord
Steven Lord 2018-2-7
Open the documentation for the save function using doc save. In order to save your data to a MAT-file with version 7.3 or later, specify the '-v7.3' flag as the version input argument. The "Save Variables to Version 7.3 MAT-File" example on that page shows the exact syntax.

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