[SciPy-dev] timeseries moved to scikits
Thu Jan 24 10:16:35 CST 2008
A Thursday 24 January 2008, David Huard escrigué:
> Hum. This was for Bradford. In any case, if anyone has suggestions or
> ideas about the implementation details, please chime in !
Yeah. I've some
> 2008/1/24, David Huard <email@example.com>:
> > Hi Bradford,
> > Before putting too much time on our respective side, maybe we
> > should discuss the basic implementation plan to make sure we agree
> > on requirements and the general layout of the code.
> > 1) In my draft, I divided the date sequence, the data and the mask
> > into three separate entities. Do this seem also reasonable to you ?
> > 2) Data is stored in a table for record arrays, and EArrray for
> > simple ndarrays. Using this setup, object arrays cannot be stored.
> > One solution could be to convert them to record arrays and store
> > them in a table with a flag indicating that when loaded, the data
> > should be returned as an object array.
Perhaps another more elegant solution would be to use a VLArray using an
> > 3) Dates are stored in a ISO compliant string EArray. I used EArray
> > because they are enlargeable. This could become handy eventually,
> > but I don't know if there are any counter-indications (file size,
> > load speed, etc)
Do not expect problems with that, but if you want to be sure that you
are getting maximum load speed, you should specify the `expectedrows`
argument in EArray constructor (see section 5.1 of manual for an
explanation on why).
>0,0< Francesc Altet http://www.carabos.com/
V V Cárabos Coop. V. Enjoy Data
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