scientific-computing Questions
17
Solved
I am working to become a scientific programmer. I have enough background in Math and Stat but rather lacking on programming background. I found it very hard to learn how to use a language for...
Trombone asked 4/11, 2009 at 4:32
1
Solved
The code below is giving me a flat line for the line of best fit rather than a nice curve along the model of e^(-x) that would fit the data. Can anyone show me how to fix the code below so that it ...
Boehmenism asked 20/12, 2010 at 23:56
2
I would like to establish a good naming scheme for physical/mathematical quantities used in my simulation code. Consider the following example:
from math import *
class GaussianBeamIntensity(obje...
Kohn asked 19/11, 2010 at 17:7
2
I am trying to write a simple low pass filter using scipy, but I need help defining the parameters.
I have 3.5 million records in the time series data that needs to be filtered, and the data is sa...
Photomap asked 11/11, 2010 at 8:14
2
Solved
I am getting the error:
Warning: invalid value encountered in log
From Python and I believe the error is thrown by numpy (using version 1.5.0). However, since I am calling the "log" function in...
Menorca asked 16/11, 2010 at 2:54
2
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What library do you use for matrix calculations on CUDA? Or are there any? It seems as if everybody writes this by himself.
For usual processors, I use Eigen. What about GPUs?
Epicurus asked 14/11, 2010 at 9:42
9
Solved
It seems to me from my experimenting with Haskell, Erlang and Scheme that functional programming languages are a fantastic way to answer scientific questions. For example, taking a small set ...
Lyublin asked 12/10, 2009 at 10:37
10
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I am curious as to how F# performance compares to C++ performance? I asked a similar question with regards to Java, and the impression I got was that Java is not suitable for heavy numbercrunching....
Composed asked 2/5, 2010 at 2:8
3
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As part of a python simulation I have I take a 2d array and take the gradient of this array. This is done in scipy/numpy by convolving the 2d array with a filter with the appropriate weights.
So ...
Freestyle asked 2/9, 2010 at 17:57
2
I have a scientific data management problem which seems general, but I can't find an existing solution or even a description of it, which I have long puzzled over. I am about to embark on a major r...
Sphygmoid asked 19/6, 2010 at 19:34
3
Solved
First of all:
I am well aware that OpenCL does not magically make everything faster
I am well aware that OpenCL has limitations
So now to my question, i am used to do different scientific calcu...
Pediform asked 19/5, 2010 at 22:32
4
How can I perform vector calculations in lisp, such as magnitude of a vector, norm of a vector, distance (between two points), dot product, cross product, etc.
Thanks.
Metallo asked 26/5, 2010 at 12:4
4
Solved
With the recent SEC proposal requiring that most Asset-Backed Securities issuers file a python computer program to document the flow of funds (or waterfall) provisions of the transaction, I thought...
Simba asked 20/5, 2010 at 2:28
5
I work in a small, independent scientific lab in a university in the United States, and it has come to my notice that, compared with a lot of practices that are ostensibly followed in the industry,...
Paugh asked 9/5, 2010 at 17:20
4
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Given the thread here
It seems that numpy is not the most ideal for ultra fast calculation. Does anyone know what overhead we must be aware of when using numpy for numerical calculation?
Femi asked 28/4, 2010 at 16:3
1
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I work with satellite radar, and have been provided with a (very) large TIFF file containing 32 bpp greyscale data. Unfortunately, libtiff, the standard Linux library for working with TIFF files, d...
Tabard asked 4/2, 2010 at 18:15
4
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I need to store scientific information in a database (sql server). What is the best way to store a value in a database where "smaller than", larger than" is part of the information.
Example:
Pati...
Hecklau asked 30/11, 2009 at 22:30
3
Solved
Is there a better way to find which X gives me the Y I am looking for in SciPy? I just began using SciPy and I am not too familiar with each function.
import numpy as np
import matplotlib.pyplot a...
Furbish asked 22/6, 2009 at 20:20
3
Solved
I am working on a scientific application that has readily separable parts that can proceed in parallel. So, I've written those parts to each run as independent threads, though not for what appears ...
Odel asked 7/10, 2009 at 16:48
9
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I'm studying C, and the idea of guard digits and rounding errors came up. Do practitioners of scripting languages (I'm thinking of Python and Perl here) need to worry about this stuff? What if they...
Sanasanabria asked 31/8, 2009 at 7:9
12
Scientific computing is algorithm intensive and can also be data intensive. It often needs to use a lot of memory to run analysis and release it before continuing with the next. Sometime it also us...
Knotted asked 24/9, 2008 at 5:9
7
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Are there any serious scientific math libraries made with functional programming languages? From the very nature of functional languages one would think that they are particularly suitable for math...
Flagpole asked 8/6, 2009 at 18:31
10
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I would like to work on a programming project in my spare time and would like to know
if there is a project where I can help the science community in some way?
Cicelycicenia asked 19/2, 2009 at 20:2
3
Solved
I'm busy! Most of my time is spent using analytical techniques, or on course work, and when I switch over to programming mode I need to generate code quickly. Since, the Primary Investigator ...
Aloysius asked 24/7, 2009 at 16:39
7
Solved
I have a large data set of tuples containing (time of event, latitude, longitude) that I need to visualize. I was hoping to generate a 'movie'-like xy-plot, but was wondering if anyone has a better...
Dilation asked 3/5, 2009 at 1:53
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