Achim Gaedke skrev:
Hello!
Has anyone experience with matlab import of pytables files?
I read about it at
http://www.mathworks.com/access/helpdesk/help/techdoc/ref/hdf5.html .
Before I start to go into matlab, I'd be glad to recieve some hints.
Thanks for an answer, Achim
There are a couple of issues with reading pytables-files in Matlab:
- If I recall correctly, Matlab 7.0 is needed for decent hdf5 support.
- Matlab tends to read the complete dataset into memory, and as far as
I can tell, at least Matlab 7.0 does this. If your dataset is large, it
will not fit in memory, so you can not read your pytables-file.
- The Matlab interface does not support the natural naming of pytables,
which I like a lot for readability.
Our solution was:
- Write a object for reading our specific type of pytables file.
- Implement natural naming via a custom subsref implementation
- Write a c/mex-file for reading only slices of the data, and
implementing a quasi array interface to the data via the subsref
implementation. This file uses the hdf5 c-api.
Therefore we have natural naming, and the possibility to read only parts
of the dataset into memory. Currently we have no support for writing
hdf5-files. Our implementation is not general, as it is tuned to the
file format we use in our application.
Hope this helps!
Best regards, Sigve
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