Hi Andre,
I've downloaded bpycdf and it works very nicely with numpy; thanks
very much for all your effort.
One small problem; I'm probably being stupid, but I cannot see how to
set a _Fillvalue as Float32.
regards, George Nurser.
On 12/02/07, Andre Gosselin [EMAIL PROTECTED] wrote:
A small
Hi all,
Is there detailed info on the installation process available.
I'm asking because in addition to installing numpy on linux-x86, I'm
also trying to install numpy on aix-power and windows-x86. So before
bombarding the ml with questions, I would like to get my hands on all
doc available
I'm new to numpy and looking for advice on setting up and managing
array data for my particular problem. I'm collecting observations of P
properties for N objects over a rolling horizon of H sample times. I
could conceptually store the data in three-dimensional array with
shape (N,P,H) that would
Andrew Straw wrote:
Here's one that seems like
it might work, but I haven't tried it yet:
http://software.jessies.org/terminator
Now if only there was a decent terminal emulator for Windows that didn't
use cygwin...
-Chris
--
Christopher Barker, Ph.D.
Oceanographer
Emergency Response
There's probably a better forum for this conversation, but...
Barry Wark wrote:
Perhaps we should consider two use cases: interactive use ala Matlab
and larger code bases.
A couple key points -- yes, interactive use is different than larger
code bases, but I think it's a Bad Idea to promite
Hi,
I'm quite new to numpy/scipy so please excuse if my problem is too obvious.
example code:
import numpy as n
print n.sin(n.pi)
print n.cos(n.pi/2.0)
results in:
1.22460635382e-016
6.12303176911e-017
I've expected something around 0. Can anybody explain what I am doing
wrong here?
On 2/21/07, WolfgangZillig [EMAIL PROTECTED] wrote:
Hi,
I'm quite new to numpy/scipy so please excuse if my problem is too
obvious.
example code:
import numpy as n
print n.sin(n.pi)
print n.cos(n.pi/2.0)
results in:
1.22460635382e-016
6.12303176911e-017
I've expected something around 0.
Your results are indeed around zero.
numpy.allclose(0, 1.22460635382e-016)
True
It's not exactly zero because floating point math is in general not
exact. You'll need to check out a reference about doing floating
point operations numerically for more details, but in general you
should
On 2/21/07, Alexander Michael [EMAIL PROTECTED] wrote:
... T is to large to fit in memory, so I need to
load up H, perform my calculations, pop the oldest N x P slice and
push the newest N x P slice into the data cube. What's the best way to
do this that will maintain fast computations along
As far as a computer is concerned, those numbers are around zero -
growing-up w/ Matlab, e.g., one quickly learns to recognize these
numbers for what they are. One way to return zero for numbers like
these is
if numpy.allclose(x, 0): return 0 (or 0*x to assure that 0 is the same
type as x),
Anne Archibald wrote:
On 21/02/07, Zachary Pincus [EMAIL PROTECTED] wrote:
A corrolary: in general do not two floating-point values for equality
-- use something like numpy.allclose. (Exception -- equality is
expected if the exact sequence of operations to generate two numbers
were
Toon Knapen wrote:
Hi all,
Is there detailed info on the installation process available.
I'm asking because in addition to installing numpy on linux-x86, I'm
also trying to install numpy on aix-power and windows-x86. So before
bombarding the ml with questions, I would like to get my hands on
Christopher Barker wrote:
I wonder if there are any C math libs that do a better job than you'd
expect from standard FP? (short of unlimited precision ones)
With respect to π and the zeros of sin() and cos()? Not really. If
numpy.sin(numpy.pi) were to give you 0.0, it would be *wrong*.
Robert Kern wrote:
Christopher Barker wrote:
I wonder if there are any C math libs that do a better job than you'd
expect from standard FP? (short of unlimited precision ones)
With respect to π and the zeros of sin() and cos()? Not really. If
numpy.sin(numpy.pi) were to give you
Robert Kern wrote:
Christopher Barker wrote:
I wonder if there are any C math libs that do a better job than you'd
expect from standard FP? (short of unlimited precision ones)
With respect to π and the zeros of sin() and cos()? Not really. If
numpy.sin(numpy.pi) were to give you 0.0, it
Christopher Barker wrote:
Robert Kern wrote:
Christopher Barker wrote:
I wonder if there are any C math libs that do a better job than you'd
expect from standard FP? (short of unlimited precision ones)
With respect to π and the zeros of sin() and cos()? Not really.
I'll back off on this a
On 21/02/07, Robert Kern [EMAIL PROTECTED] wrote:
Well, you can always use long double if it is implemented on your platform.
You
will have to construct a value for π yourself, though. I'm afraid that we
don't
really make that easy.
If the trig functions are implemented at all, you can
If none of the suggested methods turn out to be efficient enough due to
copying overhead, here's a way to reduce the copying overhead by trading
memory (and a bit of complexity) for copying overhead. The general thrust is
to allocate M extra slices of memory and then shift the data every M time
On 2/21/07, Robert Kern [EMAIL PROTECTED] wrote:
Christopher Barker wrote:
Robert Kern wrote:
Christopher Barker wrote:
I wonder if there are any C math libs that do a better job than you'd
expect from standard FP? (short of unlimited precision ones)
With respect to π and the zeros of
On 2/21/07, Charles R Harris [EMAIL PROTECTED] wrote:
On 2/21/07, Robert Kern [EMAIL PROTECTED] wrote:
Christopher Barker wrote:
Robert Kern wrote:
Christopher Barker wrote:
I wonder if there are any C math libs that do a better job than
you'd
expect from standard FP? (short of
In article [EMAIL PROTECTED],
Zachary Pincus [EMAIL PROTECTED] wrote:
Hello folks,
I've developed some command-line tools for biologists using python/
numpy and some custom C and Fortran extensions, and I'm trying to
figure out how to easily distribute them...
For people using linux,
On 2/21/07, Timothy Hochberg [EMAIL PROTECTED] wrote:
On 2/21/07, Charles R Harris [EMAIL PROTECTED] wrote:
On 2/21/07, Robert Kern [EMAIL PROTECTED] wrote:
Christopher Barker wrote:
Robert Kern wrote:
Christopher Barker wrote:
I wonder if there are any C math libs that do a
On 2/21/07, Charles R Harris [EMAIL PROTECTED] wrote:
On 2/21/07, Timothy Hochberg [EMAIL PROTECTED] wrote:
On 2/21/07, Charles R Harris [EMAIL PROTECTED] wrote:
On 2/21/07, Robert Kern [EMAIL PROTECTED] wrote:
Christopher Barker wrote:
Robert Kern wrote:
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