MATLAB COMPILER RELEASE NOTES User's Guide download pdf (Page 627)

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External Interfaces/API

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New MAT-File Format Based on HDF5

In Version 7.3 (R2006b), you can save MAT-files in a format based on HDF5. Unlike

earlier MAT-file formats, the HDF5-based format is capable of saving variables that

occupy more than 2 GB of storage, including large arrays created on 64-bit systems.

To save a MAT-file in the HDF5-based format, use the -v7.3 option to the MATLAB

save function or the "w7.3" mode argument to the C or Fortran matOpen function. The

default MAT-file format is the same as that in Version 7.2 (R2006a).

Compatibility Considerations

Earlier versions of MATLAB cannot read MAT-files written in the HDF5-based format.

MAT-files written with MATLAB Version 7.3 (R2006b) on a 64-bit system can be read

back into MATLAB 7.3 on a 32-bit system, provided that none of the values stored in the

MAT-file require more than 32 bits to store.

-V5 Option to MEX to Be Removed

The -V5 option to mex is not supported in this and future versions of MATLAB.

Compatibility Considerations

You will no longer be able to build a MEX-file that is compatible with MATLAB Version

Location of mex.bat File Changed

In MATLAB Version 7.3, the Microsoft Windows script mex.bat is located in the

directory $MATLAB\bin.

Compatibility Considerations

You may need to change any scripts or environment variables that relied on the previous

location of mex.bat.

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