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by: Zhang Le |
last post by:
Hi,
I did a small benchmark of matrix-vector multiply operation using
Numeric module. I'm a bit suprised to find matrix*col-vector is much
faster than row-vector*matrix. I wonder whether other people have
observed this fact too, and why?
Below is the code I used, with output from my machine.
python bench.py
running 1000 iterations of matrix multiply of row 1000-vector
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by: Charulatha Kalluri |
last post by:
Hi,
I'm implementing a Matrix class, as part of a project. This is the interface
I've designed:
class Matrix( )
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by: christopher diggins |
last post by:
Here is some code I wrote for Matrix multiplication for arbitrary
dimensionality known at compile-time. I am curious how practical it is. For
instance, is it common to know the dimensionality of matricies at
compile-time? Any help would be appreciated. Hopefully this code comes in
useful for someone, let me know if you find it useful, or if you have
suggestions on how to improve it.
// Public Domain by Christopher Diggins, 2005
...
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by: paytam |
last post by:
Hi all
How can I define a dynamic matrix and pass it to a function?
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by: Zoran Stipanicev |
last post by:
Hi!
The question is product of laziness. I want to write generic operators for
matrix computation which would adapt to different types of matrices i.e.
when
adding square matrix and lower triangle matrix it would add only elements on
and
under main diagonal and copy the rest from square matrix. Basically it would
allow adding new matrix type (shape) without writing new operators (I'm to
lazy
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| |
by: Stipanicev |
last post by:
I want to write generic operators for
matrix computation which would adapt to different types (shapes) of matrices
i.e. when
adding square matrix and lower triangle matrix it would add only elements on
and
under main diagonal and copy the rest from square matrix. Basically it would
allow adding new matrix type (shape) without writing new operators. Here is
the
code I hope could do that:
|
by: lethek39 |
last post by:
Hey
I have been trying to figure out how to sum rows and columns in a matrix square. I also have been trying to get the program to list the numbers of the diagonal in the matrix. So far this is the code I have (I am using Python):
def generate (rows, cols): # This just prints the coordinates and the number that goes in it, It also prints the matrix in a square
import random
m = {}
for r in range(rows):
for c in...
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by: krishnai888 |
last post by:
I had already asked this question long back but no one has replied to me..I hope someone replies to me because its very important for me as I am doing my internship.
I am currently writing a code involving lot of matrices. At one point I need to calculate the square root of a matrix e.g. A which contains non-zero off-diagonal elements. I searched for a lot of info on net but no algorithm worked. My best bet for finding square root was to find...
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by: curiously enough |
last post by:
I need a practical method to find the eigenvalues of a matrix in C++ because the one I know(the only one I know) is to subtract the elements of the diagonal by the eigenvalue and then find the determinant of this matrix: |A-xI|=0, and in C++ I do this by checking every float value with one digit after the decimal between -10000.0 and 10000.0, and I can already find the determinant.
This is its code:
float ev=-10000;
while(ev<=10000)
{...
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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