Re: [Numpy-discussion] First impressions on migrating to NumPy

[Chris K. <chr...@er...>]

Can you provide  some details about your approach to  migrating to =20
NumPy? Are you following some  documentation on migration or do  you =20
have your own  plan  of attack?

Chris
On Aug 18, 2006, at 6:59 AM, Francesc Altet wrote:

> Hi,
>
> I'm starting to (slowly) replace numarray by NumPy at the core of =20
> PyTables,
> specially at those places where the speed of NumPy is *much* =20
> better, that is,
> in the creation of arrays (there are places in PyTables where this is
> critical, most specially in indexation) and in copying arrays. In =20
> both cases,
> NumPy performs between 8x to 40x than numarray and this is, well...,
> excellent :-)
>
> Also, the big unification between numerical homogeneous  arrays, =20
> string
> homogeneous arrays (with unicode support added) and heterogeneous =20
> arrays
> (recarrays, with nested records support there also!) is simplyfying =20=

> very much
> the code in PyTables where there are many places where one have to
> distinguish between those different objects in numarray. =20
> Fortunately, this
> distinction is not necessary anymore in many of this places.
>
> Furthermore, I'm seeing that most of the corner cases where =20
> numarray do well
> (this was the main reason I was conservative about migrating =20
> anyway), are
> also very well resolved in NumPy (in some cases better, as for one, =20=

> NumPy has
> chosen NULL terminated strings for internal representation, instead =20=

> of space
> padding in numarray that gave me lots of headaches). Of course, =20
> there are
> some glitches that I'll report appropriately, but overall, NumPy is =20=

> behaving
> better than expected (and I already had *great* expectations).
>
> Well, I just wanted to report these experiences just in case other =20
> people is
> pondering about migrating as well to NumPy. But also wanted to =20
> thanks (once
> more), the excellent work of the NumPy crew, and specially Travis =20
> for their
> first-class work.
>
> Thanks!
>
> --=20
>> 0,0<   Francesc Altet     http://www.carabos.com/
> V   V   C=E1rabos Coop. V.   Enjoy Data
>  "-"
>
> ----------------------------------------------------------------------=20=

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