I had seen this, but I don't see how to point to regions inside a
leaf. It seems that h5py supports this. Quoting from their
documentation
<>
Region references always contain a selection. You create them using
the dataset property “regionref” and standard NumPy slicing syntax:
>>> myds = myfile.create_dataset('dset', (200,200))
>>> regref = myds.regionref[0:10, 0:5]
The reference itself can now be used in place of slicing arguments to
the dataset:
>>> subset = myds[regref]
</>
It seems that they can be stored in datasets and attributes.
Typically I would like to store references to interesting features in
my data (contiguous slices) that I have detected with some algorithm,
and I was wondering if I could do that with refs in HDF5 with PyTables
or I should just use tuples of integers to store slices (start, end)
in another table, and establish a link to the table /column that these
tuples refer to.
-á.
On Thu, Mar 15, 2012 at 17:59, Anthony Scopatz <scop...@gmail.com> wrote:
> Links are covered here.
>
> soft: http://pytables.github.com/usersguide/libref.html?#the-softlink-class
> hard: http://pytables.github.com/usersguide/libref.html?#the-externallink-class
>
> On Thu, Mar 15, 2012 at 7:56 AM, Alvaro Tejero Cantero <alv...@minin.es>
> wrote:
>>
>> Does PyTables support object region references[1]?
>>
>> When using soft links to other files, is a performance penalty
>> incurred? I like the idea of having the raw data, that never changes,
>> referenced from another file that is read-only. How do you guys
>> normally deal with this scenario?
>>
>> Álvaro.
>>
>> [1] I learnt about them here:
>> http://h5py.alfven.org/docs-2.0/topics/refs.html
>>
>>
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