to the numpy python module, the next time you might want
to post a question like this to one of the python beginners lists. This
link might get you started:
http://wiki.python.org/moin/BeginnersGuide
Cheers
Jochen
From a responses to a previous post, this seems as if it may have something
to do
On 07/12/2010 12:36 PM, David Goldsmith wrote:
On Sun, Jul 11, 2010 at 6:18 PM, David Goldsmith
d.l.goldsm...@gmail.com mailto:d.l.goldsm...@gmail.com wrote:
In numpy.fft we find the following:
Then A[1:n/2] contains the positive-frequency terms, and A[n/2+1:]
contains the
by sqrt(len(x)). And some fft
implementations don't do normalizations at all (FFTW).
Cheers
Jochen
DG
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confusing. I'd also suggest pointing to fftshift for converting the
standard order to order min frequency to max frequency
Cheers
Jochen
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No Warning for me:
└─(08:26 $)─ python isinf.py
True
└─(08:26 $)─ python2.5 isinf.py
True
Python 2.6.4 (r264:75706, Dec 7 2009, 18:43:55)
[GCC 4.4.1] on linux2
Python 2.5.4 (r254:67916, Jan 20 2010, 21:43:02)
[GCC 4.4.1] on linux2
numpy.version.version
'1.3.0'
└─(08:33 $)─ uname -a
is actually relying on the implicit downcast, but
I'd argue that it's bad programming anyways. It is really difficult to spot if
you reviewing someone else's code. As others mentioned it's also a bitch to
track down a bug that has been accidentally introduced by this behaviour.
Jochen
In [54]: %timeit -n 10 np.sin(d)
10 loops, best of 3: 87.7 µs per loop
In [55]: %timeit -n 10 np.sin(c.astype(np.float64)).astype(np.float32)
10 loops, best of 3: 891 µs per loop
Cheers
Jochen
On Mon, 3 Aug 2009 15:45:56 +0200
Emmanuelle Gouillart emmanuelle.gouill...@normalesup.org wrote
). The website looks like development has
been stale, but if you look at svn there've been commits lately.
Cheers
Jochen
Gaël
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TypeError: view() takes no keyword arguments
I he's on Windows and sees this error both with numpy 1.1.1 and 1.3.
I'm a bit lost anybody have an idea what could be the problem?
Cheers
Jochen
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On 21/05/09 00:20, Stéfan van der Walt wrote:
Hi Jochen
2009/5/20 Jochen Schroeder cycoma...@gmail.com:
I'm trying to help someone out with some problems with pyfftw
(pyfftw.berlios.de). He is seeing an exception,
TypeError: view() takes no keyword arguments
This doesn't only
= np.empty((n,m), dtype=complex)
C.real.flat[:] = real_values
C.imag.flat[:] = imag_values
Just a question, is there any advantage to doing
C = 1.j *imag_values + real_values
?
Cheers
Jochen
--
Robert Kern
I have come to believe that the whole world is an enigma, a harmless
enigma
On Tue, Mar 31, 2009 at 8:54 PM, Jochen S cycoma...@gmail.com wrote:
On Tue, Mar 31, 2009 at 7:13 AM, João Luís Silva jsi...@fc.up.pt wrote:
Hi,
I wrote a script to calculate the *optical* autocorrelation of an
electric field. It's like the autocorrelation, but sums the fields
instead
.
Cheers
Jochen
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On Tue, 2009-01-27 at 12:37 +0100, Sturla Molden wrote:
On 1/27/2009 1:26 AM, Jochen wrote:
a = fftw3.AlignedArray(1024,complex)
a = a+1
= used this way is not assignment, it is name binding.
It is easy to use function's like fftw_malloc with NumPy:
import ctypes
import numpy
On Tue, 2009-01-27 at 14:16 +0100, Sturla Molden wrote:
On 1/27/2009 12:37 PM, Sturla Molden wrote:
import ctypes
import numpy
fftw_malloc = ctypes.cdll.fftw.fftw_malloc
fftw_malloc.argtypes = [ctypes.c_ulong,]
fftw_malloc.restype = ctypes.c_ulong
def aligned_array(N, dtype):
in a TypeError:
TypeError: default __new__ takes no parameters
Am I correct in assuming that the documentation is incorrect and
ndpointer can only be used for argtypes? Or am I missing something?
Cheers
Jochen
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On Mon, 2009-01-26 at 19:25 -0600, Ryan May wrote:
Jochen wrote:
Hi all,
I just wrote ctypes bindings to fftw3 (see
http://projects.scipy.org/pipermail/scipy-user/2009-January/019557.html
for the post to scipy).
Now I have a couple of numpy related questions:
In order
On Tue, 2009-01-27 at 13:28 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at 12:49 +0900, David Cournapeau wrote:
Jochen wrote:
Hi all,
I just wrote ctypes bindings to fftw3 (see
http://projects.scipy.org/pipermail/scipy-user/2009-January/019557.html
On Tue, 2009-01-27 at 13:54 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at 13:28 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at 12:49 +0900, David Cournapeau wrote:
Jochen wrote:
Hi all,
I just wrote
On Tue, 2009-01-27 at 14:46 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at 13:54 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at 13:28 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at 12
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