A Sunday 03 August 2008, escriguéreu: > > This is, more or less, the procedure to follow. All the important > > methods mentioned here are documented with docstrings and with > > comments. Please read them carefully as they will hopefully > > provide you with clues for get your job done. > > Francesc, thanks for the advice! I've made real progress and am > successfully reading scalar compound data types in attributes. > However, one thing I'm running into that I'm not quite sure about. > This may be more of a general HDF5 question, so if it is off-topic I > apologize. > > I've rarely worked with the HDF5 "array" datatypes, to my knowledge. > Instead I normally use a multidimensional dataspace with a base > datatype. For example, currently with each table I wish to associate > some "recording session metadata". This is a four-field struct, and I > will generally only have one entry in this struct, but sometimes > there may be up to ~5. > > Instead of having a non-scalar dataspace with a H5T_COMPOUND type, is > it smarter to create an array data type with the H5T_COMPOUND as the > base-type?
If you need several entries in a table as an attribute, then yes, I guess this is the best way to go. > In your experience, will pytables (and perhaps even other > tools) be happier? Well, unfortunately, PyTables has never implemented an H5T_ARRAY data types with the H5T_COMPOUND as the base type, so you will have to implement this by your own. However, by using the basic building blocks that PyTables/NumPy is providing you -- and which you are already familiar -- this should be feasible (although admittedly not straightforward). > > Pytables is by far my preferred way of interacting with HDF5, but I > have users who will be using both the Java HDF5 interface and > matlab's built-in HDF5 support, so I'd be curious to know if anyone > on the list thinks there's any virtue in one approach over the other. > > > Thanks again, > ...Eric Cheers, -- Francesc Alted Freelance developer Tel +34-964-282-249 ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Pytables-users mailing list Pytables-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pytables-users
