MathGroup Archive: May 2009 [00562]

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is accessing parts of an hdf5 dataset possible?

To: mathgroup at smc.vnet.net
Subject: [mg99804] is accessing parts of an hdf5 dataset possible?
From: Paul <pnorthug at gmail.com>
Date: Fri, 15 May 2009 04:17:09 -0400 (EDT)

I have a large HDF5 dataset that cannot fit into memory if I do an
Import of the dataset.

Is there a way to load only a portion of a dataset? My dataset is a
two dimensional array. Ideally, I would be able to Import and Export
portions of the array via part assignments. Without this feature, it
is a little difficult to work with large HDF5 datasets in Mathematica,
isn't it?

I assume the answer is no in case I get no replies.

But before I write mathlink wrappers, just wanted to double check.
Such a feature is available in two python wrappers of the HDF5 library
(h5py and pytables).

Thanks,
P=E5l.

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