Use the matfile function to access matlab variables directly from mat files on disk without loading the full variables into memory.
Save mat file version 7 3.
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 only exception to this is when you create new mat files using the matfile function.
To identify or change the default mat file version access the mat files preferences.
If you look at the help of save v7 3 means version 7 0 features plus support for data items greater than or equal to 2gb on 64 bit systems which should be in your advantage.
To identify or change the default mat file version access the mat files preferences.
It complaints that you try to save to a mat file older than 7 3.
I am trying to save a large workspace as a mat for later use.
Learn more about v7 3 save variable 2gb.
How to save v7 3 format variable quickly in few.
Your matlab is r2010a which should be later than v7 3.
In this case the default mat file version is 7 3.
The only exception to this is when you create new mat files using the matfile function.
Create two variables a and b and save them to a mat file version 7 or 7 3.
By default all save operations create version 7 mat files.
Save two variables to a mat file.
Use the matfile function to create files in version 7 3 format.
In this case the default mat file version is 7 3.
For example this code.
While saving as version 7 3 works i cannot load or import the new mat file into r2017a.
Then append a third variable without compression to the same file.
By default the save function compresses variables a and b before saving them to myfile mat.
Partial loading and saving requires version 7 3 mat files any load or save operation that uses a matfile object associated with a version 7 or earlier mat file temporarily loads the entire variable into memory.
Open the documentation for the save function using doc save.
That is why the warnning message sounds strange.