On 04/09/2012 06:52 PM, Travis Oliphant wrote:
Hey all,
I've been waiting for Mark Wiebe to arrive in Austin where he will
spend several weeks, but I also know that masked arrays will be only
one of the things he and I are hoping to make head-way on while he is
in Austin.Nevertheless, we
On Tue, Apr 10, 2012 at 1:57 AM, Travis Oliphant tra...@continuum.io wrote:
On Apr 9, 2012, at 7:21 PM, Nathaniel Smith wrote:
...isn't this an operation that will be performed once per compiled
function? Is the overhead of the easy, robust method (calling ctypes.cast)
actually measurable as
On Tue, Apr 10, 2012 at 01:11, Travis Oliphant teoliph...@gmail.com wrote:
1) Create an API for such Ctypes function pointers in NumPy and use
the ctypes object structure. If ctypes were to ever change it's object
structure we would have to adapt this API.
Something like
Hi Travis,
we've been discussing almost the exact same thing in Cython (on a
workshop, not on the mailing list, I'm afraid). Our specific
example-usecase was passing a Cython function to scipy.integrate.
On 04/10/2012 02:57 AM, Travis Oliphant wrote:
On Apr 9, 2012, at 7:21 PM, Nathaniel
On 04/10/2012 12:37 PM, Nathaniel Smith wrote:
On Tue, Apr 10, 2012 at 1:57 AM, Travis Oliphanttra...@continuum.io wrote:
On Apr 9, 2012, at 7:21 PM, Nathaniel Smith wrote:
...isn't this an operation that will be performed once per compiled
function? Is the overhead of the easy, robust
Here is the body of a post I made on stackoverflow, but it seems to be a
non-obvious issue. I was hoping someone here might be able to shed light
on it...
On my 32-bit Windows Vista machine I notice a significant (5x) slowdown
when taking the absolute values of a fairly large
On Tue, Apr 10, 2012 at 1:39 PM, Dag Sverre Seljebotn
d.s.seljeb...@astro.uio.no wrote:
On 04/10/2012 12:37 PM, Nathaniel Smith wrote:
On Tue, Apr 10, 2012 at 1:57 AM, Travis Oliphanttra...@continuum.io wrote:
On Apr 9, 2012, at 7:21 PM, Nathaniel Smith wrote:
...isn't this an operation that
* Chris Barker chris.bar...@noaa.gov [2012-04-09]:
2012/4/9 Hänel Nikolaus Valentin valentin.hae...@epfl.ch:
http://www.eos.ubc.ca/research/clouds/software/pythonlibs/num_util/num_util_release2/Readme.html
that looks like it hasn't been updated since 2006 -- Id say that
makes it a
On 04/10/2012 03:00 PM, Nathaniel Smith wrote:
On Tue, Apr 10, 2012 at 1:39 PM, Dag Sverre Seljebotn
d.s.seljeb...@astro.uio.no wrote:
On 04/10/2012 12:37 PM, Nathaniel Smith wrote:
On Tue, Apr 10, 2012 at 1:57 AM, Travis Oliphanttra...@continuum.io
wrote:
On Apr 9, 2012, at 7:21 PM,
On 04/10/2012 03:10 PM, Dag Sverre Seljebotn wrote:
On 04/10/2012 03:00 PM, Nathaniel Smith wrote:
On Tue, Apr 10, 2012 at 1:39 PM, Dag Sverre Seljebotn
d.s.seljeb...@astro.uio.no wrote:
On 04/10/2012 12:37 PM, Nathaniel Smith wrote:
On Tue, Apr 10, 2012 at 1:57 AM, Travis
On Tue, Apr 10, 2012 at 2:15 PM, Dag Sverre Seljebotn
d.s.seljeb...@astro.uio.no wrote:
On 04/10/2012 03:10 PM, Dag Sverre Seljebotn wrote:
On 04/10/2012 03:00 PM, Nathaniel Smith wrote:
On Tue, Apr 10, 2012 at 1:39 PM, Dag Sverre Seljebotn
d.s.seljeb...@astro.uio.no wrote:
On 04/10/2012
On 04/10/2012 03:29 PM, Nathaniel Smith wrote:
On Tue, Apr 10, 2012 at 2:15 PM, Dag Sverre Seljebotn
d.s.seljeb...@astro.uio.no wrote:
On 04/10/2012 03:10 PM, Dag Sverre Seljebotn wrote:
On 04/10/2012 03:00 PM, Nathaniel Smith wrote:
On Tue, Apr 10, 2012 at 1:39 PM, Dag Sverre Seljebotn
On 04/10/2012 03:38 PM, Dag Sverre Seljebotn wrote:
On 04/10/2012 03:29 PM, Nathaniel Smith wrote:
On Tue, Apr 10, 2012 at 2:15 PM, Dag Sverre Seljebotn
d.s.seljeb...@astro.uio.no wrote:
On 04/10/2012 03:10 PM, Dag Sverre Seljebotn wrote:
On 04/10/2012 03:00 PM, Nathaniel Smith wrote:
On
On Tue, Apr 10, 2012 at 2:38 PM, Dag Sverre Seljebotn
d.s.seljeb...@astro.uio.no wrote:
On 04/10/2012 03:29 PM, Nathaniel Smith wrote:
Right, that's what I wasn't getting until you mentioned strcmp :-).
That said, the core numpy dtypes are singletons. For this purpose, the
signature could be
Sorry for being slow.
There is (I think) a related question I raised on the skimage list:
I have a cython function that calls a C callback function in a loop (one call
for each pixel in an image). The C function in compiled in a different shared
library (a simple C library, not a python module).
On 4/10/12 6:44 AM, Henry Gomersall wrote:
Here is the body of a post I made on stackoverflow, but it seems to be
a non-obvious issue. I was hoping someone here might be able to shed
light on it...
On my 32-bit Windows Vista machine I notice a significant (5x)
slowdown when taking the
That is rather unrelated, you better ask this again on the cython-users list
(be warned that top-posting is strongly discouraged in that place).
Dag
--
Sent from my Android phone with K-9 Mail. Please excuse my brevity.
Nadav Horesh nad...@visionsense.com wrote:
Sorry for being slow.
There is
On 10/04/2012 16:36, Francesc Alted wrote:
In [10]: timeit c = numpy.complex64(numpy.abs(numpy.complex128(b)))
100 loops, best of 3: 12.3 ms per loop
In [11]: timeit c = numpy.abs(b)
100 loops, best of 3: 8.45 ms per loop
in your windows box and see if they raise similar results?
No, the
On 04/09/2012 09:11 PM, Tony Yu wrote:
I guess I wasn't reading very carefully and assumed that you meant a
list of `slice(None)` instead of a list of `None`.
My apologies to Ben...I wasn't being pedantic to be a jerk, I was being
pedantic because I read Ben's message and thought oooh, that
On 4/10/12 9:55 AM, Henry Gomersall wrote:
On 10/04/2012 16:36, Francesc Alted wrote:
In [10]: timeit c = numpy.complex64(numpy.abs(numpy.complex128(b)))
100 loops, best of 3: 12.3 ms per loop
In [11]: timeit c = numpy.abs(b)
100 loops, best of 3: 8.45 ms per loop
in your windows box and
On Tue, Apr 10, 2012 at 12:57 PM, Francesc Alted franc...@continuum.iowrote:
On 4/10/12 9:55 AM, Henry Gomersall wrote:
On 10/04/2012 16:36, Francesc Alted wrote:
In [10]: timeit c = numpy.complex64(numpy.abs(numpy.complex128(b)))
100 loops, best of 3: 12.3 ms per loop
In [11]: timeit
On Tue, Apr 10, 2012 at 12:52 PM, Jonathan T. Niehof jnie...@lanl.govwrote:
On 04/09/2012 09:11 PM, Tony Yu wrote:
I guess I wasn't reading very carefully and assumed that you meant a
list of `slice(None)` instead of a list of `None`.
My apologies to Ben...I wasn't being pedantic to be a
On 10/04/2012 17:57, Francesc Alted wrote:
I'm using numexpr in the end, but this is slower than numpy.abs under linux.
Oh, you mean the windows version of abs(complex64) in numexpr is slower
than a pure numpy.abs(complex64) under linux? That's weird, because
numexpr has an independent
On 4/10/12 11:43 AM, Henry Gomersall wrote:
On 10/04/2012 17:57, Francesc Alted wrote:
I'm using numexpr in the end, but this is slower than numpy.abs under linux.
Oh, you mean the windows version of abs(complex64) in numexpr is slower
than a pure numpy.abs(complex64) under linux? That's
10.04.2012 06:52, Travis Oliphant kirjoitti:
[clip]
4) I'm still not sure about whether the IGNORED
concept is necessary or not. I really like the separation
that was emphasized between implementation (masks versus
bit-patterns) and operations (propagating versus non-propagating).
Pauli
On Apr 10, 2012, at 10:25 AM, Nadav Horesh wrote:
Sorry for being slow.
There is (I think) a related question I raised on the skimage list:
I have a cython function that calls a C callback function in a loop (one call
for each pixel in an image). The C function in compiled in a different
On Mon, Apr 9, 2012 at 10:32 PM, Bryan Van de Ven bry...@continuum.iowrote:
On 4/3/12 4:18 PM, Ralf Gommers wrote:
Here some first impressions.
The good:
- It's responsive!
- It remembers my preferences (view type, # of issues per page, etc.)
- Editing multiple issues with the
On Tue, Apr 10, 2012 at 8:40 PM, Ralf Gommers
ralf.gomm...@googlemail.comwrote:
On Mon, Apr 9, 2012 at 10:32 PM, Bryan Van de Ven bry...@continuum.iowrote:
On 4/3/12 4:18 PM, Ralf Gommers wrote:
Here some first impressions.
The good:
- It's responsive!
- It remembers my preferences
Hello,
Anyone there?
williamj
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On 04/10/2012 10:13 PM, William Johnston wrote:
Hello,
Anyone there?
williamj
The likely reason nobody answers your question is that this is the list
for NumPy for CPython, and the .NET port of NumPy is something 99.9% of
the readers know nothing about.
I'm not sure if there's even a list
On Sat, Apr 7, 2012 at 8:07 PM, Travis Oliphant tra...@continuum.io wrote:
If we just announce that there has been some code changes that alter
corner-case casting rules, I think we can move forward.
Sounds good to me.
We could use a script to document the changes and create a test case
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