[SciPy-user] [Timeseries] Linux installation error

Christiaan Putter ceputter@googlemail....
Thu Apr 2 19:21:32 CDT 2009


Ok, just tested the code you sent me and it works just fine  (had to
kill numpy 1.2 though)

Some simple copy / pastable examples would be great to get new users
(that's me) going :-)

Quick question:

Is there any possibility to use python's decimal data type?  I saw you
used it in your sql example on the database side, but I'm guessing
numpy doesn't allow for this?  I sometimes have problems with equality
testing after several divisions / multiplications, so at the moment I
revert to the "is kind of" instead of the "is equal to" approach of
comparison...




2009/4/3 Christiaan Putter <ceputter@googlemail.com>:
> Hi Pierre,
>
> Thanks for your swift reply, I'll test the code tomorrow.
>
> I'm looking forward to using your timeseries module.  I'm writing a
> finance app using Enthought's tool suite and it seems timeseries will
> come in quite handy.  Up until now I've been using normal numpy arrays
> with pytables for storing actual historical data and postgres (with
> SQLAlchemy) for storing some 'higher' level information about stocks
> and the results of analysis done on said historical data.  I've found
> it's a pretty good combination since hdf5 compression keeps the data
> size down to only a few hundred megs and SQLAlchemy is simply awesome
> for running queries.
>
> Pytables doesn't play well with threading though even though I'm using
> locks in any block of code that so much as sniffs at the hdf5 file
> (strangely though it's rather stable on linux but crashes horribly on
> windows without even the courtesy of a trace back).  I'll test h5py
> some time next week and if it performs better (which they claim on
> their site :-) I'll see if I can cook something up similar to what you
> did for integrating timeseries and pytables.  I'll send it along to
> you once it's usable.
>
> In case that doesn't work I'll probably resort to storing the
> historical data in sql as well.  Can someone give me some pointers on
> how I would go about that perhaps?  It's about 20 000 - 30 000 stocks
> with on average about a decades worth of daily data.  Would I dump all
> of that into a single table?  20 000 tables?  hdf5 certainly is much
> better suited for something like that...
>
> Hope everyone is having a great day.
>
> Regards,
> Christian
>
>
>
> 2009/4/3 Pierre GM <pgmdevlist@gmail.com>:
>>
>> On Apr 2, 2009, at 6:43 PM, Christopher Barker wrote:
>>
>>> Pierre GM wrote:
>>>> On Apr 2, 2009, at 6:19 PM, Tim Michelsen wrote:
>>>>> Indeed, the newly organised documentation with its logo is just
>>>>> impressive.
>>>
>>> where to I find these impressive docs?
>>
>> http://pytseries.sourceforge.net/
>>
>> (or google "scikits timeseries" and feel lucky)
>> _______________________________________________
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>


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