Thank you all for your suggestions. I'm taking the time to look into
all of them properly.
Giorgio: A cursory glance looks promising there, thanks.
Zachary: Brilliant, that looks great.
val: What you are saying is correct, at the moment I'm taking 2 lines
of context around each instance of the t
Dave,
I'm may be totally wrong, but i have intuitive feeling that
your problem may be reformulated with focus on separation of a "basic"
physical (vs. mathematical) 'core' and the terms which depend on a
reasonable "small parameter". In other words, my point is
to build a simplified model pro
Alexander Schmolck wrote:
> Robert Kern <[EMAIL PROTECTED]> writes:
>
>> Alexander Schmolck wrote:
>>> Robert Kern <[EMAIL PROTECTED]> writes:
>>>
If possible, I would prefer a way to pass a value to use and raise the
error if
no such value is passed rather than hardcode an identit
Robert Kern <[EMAIL PROTECTED]> writes:
> Alexander Schmolck wrote:
>> Robert Kern <[EMAIL PROTECTED]> writes:
>>
>>> If possible, I would prefer a way to pass a value to use and raise the
>>> error if
>>> no such value is passed rather than hardcode an identity value for min()
>>> and max().
>
Alexander Schmolck wrote:
> Robert Kern <[EMAIL PROTECTED]> writes:
>
>> If possible, I would prefer a way to pass a value to use and raise the error
>> if
>> no such value is passed rather than hardcode an identity value for min() and
>> max().
>
> What's wrong with inf? I'm not sure integer r
On 5/14/07, [EMAIL PROTECTED]
<[EMAIL PROTECTED]> wrote:
> Message: 3
> Date: Mon, 14 May 2007 14:21:50 -0400
> From: "David M. Cooke" <[EMAIL PROTECTED]>
> Subject: Re: [Numpy-discussion] .max() and zero length arrays
> To: Discussion of Numerical Python
> Message-ID: <[EMAIL PROTECTED]>
> Conte
On Mon, May 14, 2007 at 11:44:11AM -0700, Ray S wrote:
> While investigating ctypes and numpy for sharing, I saw that the
> example on
> http://www.scipy.org/Cookbook/Ctypes#head-7def99d882618b52956c6334e08e085e297cb0c6
> does not quite work. However, with numpy.version.version=='1.0b1',
> Active
Robert Kern <[EMAIL PROTECTED]> writes:
> If possible, I would prefer a way to pass a value to use and raise the error
> if
> no such value is passed rather than hardcode an identity value for min() and
> max().
What's wrong with inf? I'm not sure integer reductions should have
max/min-ints as
David M. Cooke wrote:
> On Mon, May 14, 2007 at 12:38:58PM -0500, Nick Fotopoulos wrote:
>> Dear all,
>>
>> I find myself frequently wanting to take the max of an array that
>> might have zero length. If it is zero length, it throws an exception,
>> when I would like to gracefully substitute my ow
Ray S wrote:
> print N.diag(x)
>
> Works for me...
>
> I can then do:
> >>> import numpy.core.multiarray as MA
> >>> xBuf = MA.getbuffer(x)
> >>> z = MA.frombuffer(xBuf).reshape((3,3))
>
I see this kind of importing used more often than it should be.
It is dangerous to import directly fro
While investigating ctypes and numpy for sharing, I saw that the
example on
http://www.scipy.org/Cookbook/Ctypes#head-7def99d882618b52956c6334e08e085e297cb0c6
does not quite work. However, with numpy.version.version=='1.0b1',
ActivePython 2.4.3 Build 12:
import numpy as N
from ctypes import *
x
or:
a=array([1,2,3]).reshape((-1,1))
Darn, I guess there is more than one obvious way to do it!
-Chris
--
Christopher Barker, Ph.D.
Oceanographer
Emergency Response Division
NOAA/NOS/OR&R(206) 526-6959 voice
7600 Sand Point Way NE (206) 526-6329 fax
Seattle, WA 98115
On 5/14/07, Zachary Pincus <[EMAIL PROTECTED]> wrote:
>> I've got a few questions that came up as I tried to calculate various
>> statistics about an image time-series. For example, I have an array
>> of shape (t,x,y) representing t frames of a time-lapse of resolution
>> (x,y).
>>
>> Now, say I
On Mon, May 14, 2007 at 12:38:58PM -0500, Nick Fotopoulos wrote:
> Dear all,
>
> I find myself frequently wanting to take the max of an array that
> might have zero length. If it is zero length, it throws an exception,
> when I would like to gracefully substitute my own value. For example,
> one
Dear all,
I find myself frequently wanting to take the max of an array that
might have zero length. If it is zero length, it throws an exception,
when I would like to gracefully substitute my own value. For example,
one solution with lists is to do max(possibly_empty_list +
[minimum_value]), but
Hello Dave,
I don't know if this will be useful to your research, but it may be
worth pointing out in general. As you know PCA (and perhaps some
other spectral algorithms?) use eigenvalues of matrices that can be
factored out as A'A (where ' means transpose). For example, in the
PCA case,
>> I've got a few questions that came up as I tried to calculate various
>> statistics about an image time-series. For example, I have an array
>> of shape (t,x,y) representing t frames of a time-lapse of resolution
>> (x,y).
>>
>> Now, say I want to both argsort and sort this time-series, pixel-
>
On 5/13/07, Zachary Pincus <[EMAIL PROTECTED]> wrote:
Hello all,
I've got a few questions that came up as I tried to calculate various
statistics about an image time-series. For example, I have an array
of shape (t,x,y) representing t frames of a time-lapse of resolution
(x,y).
Now, say I want
> Is the genutils module not included to standard CPython edition?
It's not. It's a sub-module of IPython.
It's based on the resource module,though and that comes with Python on
Linux. Just define the function Fernando posted:
> > def clock():
> > """clock() -> floating point number
Hi,
in error logs as yours, always look for the first line which says "error". If
it is, like in your case, something like
On Sunday, 13. May 2007 19:21:15 dmitrey wrote:
> /usr/lib/gcc/x86_64-linux-gnu/4.1.2/include/limits.h:122:61: error:
> limits.h: No such file or directory
you are missing
Hello all,
I've got a few questions that came up as I tried to calculate various
statistics about an image time-series. For example, I have an array
of shape (t,x,y) representing t frames of a time-lapse of resolution
(x,y).
Now, say I want to both argsort and sort this time-series, pixel-
If you are using it for making a PCA,
why dont' you try to use nipals algorithm ?
(probably a silly question , just wanted to give help :)
Giorgio
>
>
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