On Fri, Mar 6, 2009 at 6:18 PM, Stéfan van der Walt wrote:
> Hi all,
>
> The following code succeeds, while I thought it should fail:
>
> a = np.zeros(6) # real
> b= np.arange(6)*(2+3j) # complex
> a[1] = b[1] # shouldn't this break?
>
> What is the rationale behind this behaviour?
>
The same as
Hi all,
The following code succeeds, while I thought it should fail:
a = np.zeros(6) # real
b= np.arange(6)*(2+3j) # complex
a[1] = b[1] # shouldn't this break?
What is the rationale behind this behaviour?
Cheers
Stéfan
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Fixed the problem - I was importing a bunch of numbers from a file, and I
wasn't casting them as doubles. Thanks for the help!
Charles
On Fri, Mar 6, 2009 at 4:26 PM, Charles R Harris
wrote:
>
>
> On Fri, Mar 6, 2009 at 4:22 PM, charles reid wrote:
>
>> In [3]: mixfracarray=array(mixfrac)
>>
>
On Fri, Mar 6, 2009 at 4:22 PM, charles reid wrote:
> In [3]: mixfracarray=array(mixfrac)
>
> In [4]: mixfracarray.dtype
> Out[4]: dtype('|S17')
>
It's a string array. What does your file look like and how do you import it?
Chuck
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This indicates that the values are strings, so you can't make an FFT
from them. Convert your array to float or double array first.
Matthieu
2009/3/7 charles reid :
> In [3]: mixfracarray=array(mixfrac)
>
> In [4]: mixfracarray.dtype
> Out[4]: dtype('|S17')
>
>
>
> On Fri, Mar 6, 2009 at 4:09 PM,
In [3]: mixfracarray=array(mixfrac)
In [4]: mixfracarray.dtype
Out[4]: dtype('|S17')
On Fri, Mar 6, 2009 at 4:09 PM, Charles R Harris
wrote:
>
>
> On Fri, Mar 6, 2009 at 3:51 PM, charles reid wrote:
>
>> In [3]: type(mixfrac)
>> Out[3]:
>>
>> In [4]: mixfracarray=array(mixfrac)
>>
>> In [5]:
On Fri, Mar 6, 2009 at 3:51 PM, charles reid wrote:
> In [3]: type(mixfrac)
> Out[3]:
>
> In [4]: mixfracarray=array(mixfrac)
>
> In [5]: type(mixfracarray)
> Out[5]:
>
>
Try mixfracarray.dtype ...Chuck
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In [3]: type(mixfrac)
Out[3]:
In [4]: mixfracarray=array(mixfrac)
In [5]: type(mixfracarray)
Out[5]:
(Is that what you were referring to?)
On Fri, Mar 6, 2009 at 3:44 PM, Charles R Harris
wrote:
>
>
> On Fri, Mar 6, 2009 at 3:36 PM, charles reid wrote:
>
>> Hi there -
>>
>> I've imported s
On Fri, Mar 6, 2009 at 3:36 PM, charles reid wrote:
> Hi there -
>
> I've imported some data from a file, and it's in a list called mixfrac.
> I'd like to take the Fourier transform of the data, but when I try to take
> the FFT of the list, I get this error:
>
> --
Hi there -
I've imported some data from a file, and it's in a list called mixfrac. I'd
like to take the Fourier transform of the data, but when I try to take the
FFT of the list, I get this error:
---
TypeError
On Fri, Mar 6, 2009 at 2:01 PM, Charles R Harris
wrote:
> Hi David,
>
> Currently,
>
> bint.i = __STR2INTCST("ABCD");
>
> It is probably more portable to just initialize the union
>
> union {
> char c[4];
> npy_uint32 i;
> } bint = {'A','B','C','D'};
>
>
> If you use const
Hi David,
Currently,
bint.i = __STR2INTCST("ABCD");
It is probably more portable to just initialize the union
union {
char c[4];
npy_uint32 i;
} bint = {'A','B','C','D'};
If you use const union the initialization will be done at compile time.
Chuck
___
Greetings,
I am running Windows Vista Ultimate and trying to build numpy from the
SVN branch using MSVC 2003. I have been able to build previously, but
with my latest SVN update I am no longer able to build. My CPU is an
Intel Core2 T7600 @2.33GHz. The error is below.
e:\svn\numpy\numpy\core\i
On Mar 6, 2009, at 12:46 PM, Charles R Harris wrote:
> On Fri, Mar 6, 2009 at 8:28 AM, Ryan May wrote:
> Hi,
>
> Is anyone getting mails of the SVN commits? I've gotten 1 spam
> message from that list, but no commits.
>
> Ryan
>
> I'm not seeing them either...Chuck
Hey guys, I'm working on th
On Fri, Mar 6, 2009 at 8:28 AM, Ryan May wrote:
> Hi,
>
> Is anyone getting mails of the SVN commits? I've gotten 1 spam message
> from that list, but no commits.
>
> Ryan
>
I'm not seeing them either...Chuck
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2009/3/5 Francesc Alted :
> A Thursday 05 March 2009, Francesc Alted escrigué:
>> Well, I suppose that, provided that Cython could perform the for-loop
>> transformation, giving support for strided arrays would be relatively
>> trivial, and the performance would be similar than numexpr in this
>> c
Hi,
> The idea behind the current syntax was to keep things as close as
> possible to Python/NumPy, and only provide some "hints" to Cython for
> optimization. My problem with this now is that a) it's too easy to get
> non-optimized code without a warning by letting in untyped indices, b) I
> thin
It was one of the first things I tried, without success
Nadav.
-הודעה מקורית-
מאת: numpy-discussion-boun...@scipy.org בשם Anne Archibald
נשלח: ה 05-מרץ-09 22:06
אל: Discussion of Numerical Python
נושא: Re: [Numpy-discussion] Interpolation via Fourier transform
2009/3/5 M Trumpis :
> Hi
Hi Nadav
You can also read the interesting discussion at
http://projects.scipy.org/numpy/ticket/748
which also contains some padding code.
I still disagree with the conclusion, but oh well :)
Cheers
Stéfan
2009/3/6 Nadav Horesh :
> I found the solution I needed for my peculiar case after read
Hi,
I have updated http://numpy.scipy.org/array_interface.shtml to have a
giant warning first paragraph describing how that information is
outdated. Additionally, I have updated http://numpy.scipy.org/ to point
people to the buffer interface described in PEP 3118 and implemented in
Python 2.6/
I found the solution I needed for my peculiar case after reading your email
based of the following stages:
I have a N x N frequency-domain matrix Z
1. Use fftshift to obtain a DC centered matrix
Note: fftshift(fft(a)) replaces np.fft.fft(np.power(-1,np.arange(64))*a)
Zs = np.fft.fftshift(Z
Hi,
Is anyone getting mails of the SVN commits? I've gotten 1 spam message from
that list, but no commits.
Ryan
--
Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma
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Hi all,
I have added to the ticket [1] a script that compares the proposed
setmember1d_nu() implementations of Neil and Kim. Comments are welcome!
[1] http://projects.scipy.org/numpy/ticket/1036
r.
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