On 5/21/12 9:31 PM, Josh Ayers wrote: > Hi Alex, > > Reading a PyTables file in another platform should be easy, as long as > you use a compression library that is supported on both platforms. > The most widely available is likely to be zlib, since it is included > in the pre-built binaries available from the HDF group's website. > There are C and Fortran versions available here: > http://www.hdfgroup.org/HDF5/release/obtain5.html. It looks like > there's also a partial .NET wrapper of the library here: http://hdf5.net/. > > Recent versions of Matlab also have support for HDF5 (the v7.3 > "mat-file" format is based on it). Since I have it available, I just > verified that Matlab R2011b can read PyTables files in uncompressed > and zlib compressed formats, using Matlab's h5read function. It > failed when the PyTables file was compressed with bzip2, lzo, or > blosc. I only tested it with a PyTables table, which is read into > Matlab as a struct.
Blosc is prepared to interact with the generic HDF5 library, so your current HDF5 applications can read datasets compressed with it. But you need to re-compile your HDF5 library for getting this support: https://github.com/FrancescAlted/blosc/tree/master/hdf5 > > As far as writing files on another platform and then reading them in > PyTables, that will be a little more difficult. There are certain > HDF5 attributes that are required by PyTables on each group and > dataset. All the details are documented here: > http://pytables.github.com/usersguide/file_format.html. Nope. These attributes are not required, they are optional. PyTables generally makes a good job at accessing HDF5 without this info. FYI, these attributes are a superset of the High Level HDF5 library: http://www.hdfgroup.org/HDF5/hdf5_hl/ -- Francesc Alted ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Pytables-users mailing list Pytables-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pytables-users
