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by: Michael Bader |
last post by:
Hi,
I'm currently working on a matrix multiplication code (matrix times
matrix), and have come along some interesting/confusing results
concerning the running time of the (apparently) same algorithm,
when implemented in C or C++. I noticed that the implementation
in C is faster by a factor of 2.5 compared to a identical(?)
C++-implementation.
The basic algorithm in C is:
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by: Soeren Sonnenburg |
last post by:
Hi all,
Just having started with python, I feel that simple array operations '*'
and '+' don't do multiplication/addition but instead extend/join an
array:
a=
>>> b=
>>> a+b
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by: Ralf Hildebrandt |
last post by:
Hi all!
First of all: I am a C-newbie.
I have noticed a "strange" behavior with the standart integer
multiplication. The code is:
void main(void)
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by: Christopher Dyken |
last post by:
Hi group,
I'm trying to implement two routines to handle 32x32-bits and
64x64-bits signed integer multiplication on a 32 bits machine in C. It
easy to find descriptions of non-signed multiplication, however, I
haven't found any good descriptions for the signed counterpart.
Does any of you have a good reference for this topic?
Thanks in advance,
|
by: emaghero |
last post by:
Does anybody know an algorithm for the fast multiplication of three n-x-n symmetric matrices?
I have an algorithm, which I'm not too pleased with, that does the job.
Does anybody know a faster method, or even how to improve my algorithm?
My algorithm takes three n-x-n symmetric matrices, A, B, C
It multiplies the first two in the usual way to give a matrix D = A*B.
|
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by: Pesso |
last post by:
What happens if you multiple two integers and the result overflows the
MAX_INT in C? Is there a way to trap the condition when it happens?
|
by: VijaKhara |
last post by:
Hi all,
Is there any method which can implememt the matrix multiplication
faster than using the formula as we often do by hand?
I am writing the following code and my matrice: one is 3x40000 and the
other one 40000x3.
the program runs too slow:
/*multiply two matrice: xyz_trans * xyz , the output is w 3x3*/
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by: amitsoni.1984 |
last post by:
Hi,
Is there any direct function for matrix multiplication in Python or
any of its packages? or do we have to multiply element by element?
Thank you,
Amit
|
by: susheela s |
last post by:
Hi,
Im doing a multiplication of two large integers which are store in arrays(such as 2345 is in array as 2 in a, 3 in a and so on)like this im storing integers in two arrays.The logic i have used is explained with code below,
class large{
int no; //array is used to store the large number. Each digit of a the number is stored as an element..
// 123 is stored as no={1,2,3}
public:
large operator *(large& x){ // overload...
|
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: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
| |
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
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...
|
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();...
|
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: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
|
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
|
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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