Re: [Pytables-users] performance question ( with source )

[Francesc A. <fa...@ca...>]

A Dilluns 26 Setembre 2005 20:50, Stefan Kuzminski va escriure:
> Once I calculate an index ( not a specific pytables index, just a
> vector of row numbers ) that is the new order that the table has to be
> in, I tried to just random access the source table, but that was slow..
>
> for idx in new_order:
>    new_table.append( src_table[idx] )
>
> I wonder if I should try this approach but in a column oriented way?
> Is there a way to pass to pytables the order that you want the data
> returned?

Yes, there is. Try:

   new_table.append( src_table.readCoordinates(new_order) )

In the future, one should be able to do:

   new_table.append( src_table[new_order] )

as well :-)

I'm not sure, but you may need to try with 1.2bx accessible in:

http://www.carabos.com/downloads/pytables/preliminary/

in order to make readCoordinates to work well (although 1.1.1 should
work fine, I believe)

Cheers,

=2D-=20
>0,0<   Francesc Altet =A0 =A0 http://www.carabos.com/
V   V   C=E1rabos Coop. V. =A0=A0Enjoy Data
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