Are MAT-file version 7.3 files not compressed by default in MATLAB 7.5 (R2007b)?
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In the MATLAB documentation:
help --> MAT-File preferences (Under General Preferences for MATLAB)
help --> Saving and Loading MAT-Files --> Exporting Data to MAT-Files --> Data Compression
help --> save
The documentation on any of these features does not reflect or clarify whether MAT-files saved with version 7.3 are compressed or not.
Accepted Answer
MathWorks Support Team
on 7 Jan 2010
This change has been incorporated into the documentation in Release 2009b (R2009b). For previous releases, read below for any additional information:
For MATLAB releases R2006b through R2007b MAT-files created with the SAVE command and the -v7.3 flag are not compressed.
It is possible to save variables in a compressed format for these releases by using the HDF5 file format.
For more information on HDF5 capabilities and MATLAB supported functions execute the following at the MATLAB command prompt:
DOC HDF5
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