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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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-
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
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
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-
wise. (For
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,
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 want to both
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/ORR(206) 526-6959 voice
7600 Sand Point Way NE (206) 526-6329 fax
Seattle, WA 98115
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 *
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 from numpy.core and
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
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',
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 numpy-discussion@scipy.org
Message-ID: [EMAIL
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 reductions
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().
What's wrong with
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 identity value for min()
and
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
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