[SciPy-dev] timeseries moved to scikits

David Huard david.huard@gmail....
Thu Jan 24 09:24:40 CST 2008


Hum. This was for Bradford. In any case, if anyone has suggestions or ideas
about the implementation details, please chime in !

Cheers,

David


2008/1/24, David Huard <david.huard@gmail.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.
>
> 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)
>
>
> 4) The mask is stored similary to the data. The only exception is that
> when the mask is scalar (eg. all masked values are False), the mask is
> simply stored as an attribute of the data.
>
> 5) We should decide on how and where attributes are stored (eg.
> fill_value, frequency).
>
> 6) Each array has its own group, so that multiple arrays can be stored in
> the same file. Although this is flexible, we should think about how to
> access each individual array, and possibly provide a list of the available
> arrays within a file.
>
> Waiting for your comments,
>
>
> David
>
>
>
>
>
>
>
>
>
>
> 2008/1/24, Bradford Cross <bradford.n.cross@gmail.com >:
> >
> > congrats matt...i am working with someone now on merging our code that
> > creates a time series repository using numy + pytables + timeseries ...
> > ability to store timeseries in pytables as timeseries, numpy arrays, or ad
> > hoc for heterogeneous arrays...
> >
> > On Jan 22, 2008 8:28 PM, Matt Knox < mattknox_ca@hotmail.com> wrote:
> >
> > >  The timeseries module has been moved to the scikits svn repository (
> > > http://svn.scipy.org/svn/scikits/trunk/timeseries) and removed from
> > > the sandbox. It installs as a scikits namespace package as per the scikits
> > > convention.
> > >
> > > The maskedarray branch of numpy (only available in svn) is currently
> > > required for the timeseries scikit. This requirement will go away once the
> > > maskedarray merging is complete and an official  release of numpy has been
> > > made with the new masked array module.
> > >
> > > I'll try to whip up a quick page on the trac site for the timeseries
> > > module some time this week and port the existing documentation over to
> > > there.
> > >
> > > - Matt
> > >
> > > _______________________________________________
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> > > Scipy-dev@scipy.org
> > > http://projects.scipy.org/mailman/listinfo/scipy-dev
> > >
> > >
> >
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> >
> >
>
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