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Leonard

Leonard (view profile)

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Is the amount of hard drive space used when a variable is saved to a .mat file equivalent to the amount of RAM the variable requires when loaded into the workspace?

Asked by Leonard

Leonard (view profile)

on 27 Jul 2017
Latest activity Answered by Walter Roberson

Walter Roberson (view profile)

on 27 Jul 2017
I am working on large, multidimensional images and recently got an error in R2017a for my variable being too large (~33GB when I only have 32GB of RAM). I made a slight adjustment to decrease the size of my array and everything worked as expected.
However, once I saved the variable as a .mat file I found that the file is quite a bit smaller, ~193MB.
Why is that the case, and will there be issues when I attempt to load the file into my workspace?

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Walter Roberson

Walter Roberson (view profile)

Answer by Walter Roberson

Walter Roberson (view profile)

on 27 Jul 2017

.mat -v7.3 files can use compression.

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