A Monday 01 June 2009 19:25:17 Robert Ferrell escrigué:
> I'm trying to write a table of numpy records, but failing.
>
> I have a numpy dtype
>
> dtp = np.dtype([('x',np.float64), ('y', np.float64)])
>
> I was hoping I could make columns with this:
>
> class DoesNotWork(tables.IsDescription):
> XY = tables.Col.from_atom(tables.Atom.from_dtype(dtype=dtp))
>
> but PyTables doesn't like that. The complaint is "compound data types
> are not supported: dtype([('x', '<f8'), ('y', '<f8')])".
>
> I can make a compound data type manually just fine:
>
> class ThisWorks(tables.IsDescription):
> x = tables.Float64Col()
> y = tables.Float64Col()
>
> Is it possible to make a table description directly from my dtype? If
> not, is there some other way to create the description directly from
> the dtype?
Mmh, the `createTable()` constructor does accept a record array as input.
Would that be enough for you?
HTH,
--
Francesc Alted
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