[matrix-multiplication] Forum Topics

Hi everyone, I'm new to parallel programming, and my project is the two-dimensional matrix vector multiplication using mpi in C programming language. I have this multiplication function, but I don't know exactly how to run it with mpi. Can you help me, please? I write these commands, $ mpicc -g …

guys pls help me ,, how can i make a matrix round rounbin display ,, if you have an idea thats a big help for me

I got an Assignment to sort a Randomized Dynamic 2D Matrix of Integers , Snake style : for Example : biggest number in row 0 , after it follows (beneath it , vividly) the next number : 1 2 3 4 5 10 9 8 7 6 11 12 13 …

in working with my 2d arrays, i have to read in from an input file a char array of NxN and manipulate the matrix in various ways. i have gotten just about everything finished, except i cannot figure out the logic of shifting a row left or right, or shifting …

**A newbie would appreciate if someone could give him a pseudocode or any kind of explanation for the part of the code where the actual algorithm for matrix determinant is written.** using System; namespace Determinant { class Program { public static double DET(int n, double[,] Mat) { double d = …

#include <iostream> using namespace std; void enterData(double firstMatrix[][10], double secondMatrix[][10], int rowSecondFirst, int columnCountFirst, int rowCountSecond, int columnCountSecond); void multiplyMatrices(double firstMatrix[][10], double secondMatrix[][10], double result[][10], int rowCountFirst, int columnCountFirst, int rowCountSecond, int columnCountSecond); void display(double mult[][10], double rowFirst, double columnSecond); int i, j, k; int main() { double firstMatrix[10][10], secondMatrix[10][10], …

I'm trying to build my skills here. This code compiles and runs successfully if I go out of class. It crashes when I need to enter numbers for matrices. Can somebody explain to me why this crashes? #pragma once #ifndef matrixType_h #define matrixType_h template <class T> class matrixType { public: …

Following is a matrix multiplication code written in MPI (Message Passing Interface) which could be run on CPU cluster for parallel processing. This has been successfully tested with two square matrices, each of the size 1500*1500.

can anyone show me how to write a 2 * 2 matrix multiplication program.

I have a matrix structure (for storing squared matrices) which is defined as typedef struct { int **matrix; int format; }MATRIX; How to add 'n' number of matrices?

Hello to all programmers out there. Considering the growing request for practice problems by the beginners, we ( Me, Joey, Niek, Aaron..) have decided to start a sticky which will host some common practice problems which would help the beginners in understanding the programming concepts in a better way. (Did …

I am working on a multi-level marketing (matrix type) web application for a friend. I need assistance with a code snippet for generating a tree view of the downlines and the income calculations. The width is 3 and depth is 4. Thanks

I've been here before but I'm looking to find a single-pass method to input the LRS `[[0,0,0],[0,0,0],[1,1,1]]` and get a basic 3x4 (at least) matrix in return: [ [1,0,0,0], [0,1,0,0], [0,0,1,0] ] ^ matrix is NOT transposed (I'll never understand why we use column-major) anyone got anything on this?? > …

write an program to input elemants in 2d array and display this in matrix form

My professor assigned a problem from our OS book about matrix multiplication. Its pretty simple as the book shows how to do most of it. But now my professor has added an extra layer of difficulty. Instead of declaring the multidimensional arrays globally he wants us to input the size …

so I've been working with alot of common interfaces and the typical layout for this data seems to follow: - LRS (Loc, Rot, Scale) >( calculated to )> 3x4 transform matrix (Parent Relation) - 3x4 local-bind matrix (Parent relation) - 3x4 inverse-bind matrix (Inverse-World Relation) the most important matrix is …

Hello! I'm trying to find the longest sequence of equal elements in a matrix M x N. I use two nested for-loops to search into the rows and compare the cells - same thing for the columns. When two adjacent elements are equal, I increment a counter. If the counter …

I’m working on a little matrix class for my own use and because for me, it is just fun! Now I noticed a lot (10 and more) of the methods always seem to follow the same pattern: - Iterate over the rows - For each row iterate over the columns …

I have come across one question: find the size of two 2-D arrays when double pointers are given for them.Then find, if we can muliply these two matrices(those mathematics rules). finally we have to multiply the matrices. I have asked this question(small part of this question) earlier also. someone answered …

**Problems 1: Spiral matrix - Advanced** Source of the problem: [Here (not in English)](http://www.spoj.com/PTIT/problems/BCACM11B/) Spiral matrix is formed by filling number 1 in 1st row 1st column, after that, filling with increasing number by clockwise, example: 1 2 3 4 5 16 17 18 19 6 15 24 25 20 …

Write a program which finds the factorial of a number entered by the user. (check for all conditions) (Beginner). Create a program which generates fibonacci series till a number 'n' where 'n' is entered by the user. For eg. if the user enters 10 then the output would be: 1 …

write a program select an operation 1)innerproduct 2)matrix*vector 3)vector*matrix 4)matrix*matrix 5)transpose 6)exit how i wrote this with switch and for loop

Hi, I am multiplying two matricies in assembly. It is a 2 x 2, and as you can see they are defined down below in the code. I am also defining storate for 4 words so tht I can save the resulting matrix. 1. I declare offset fo each matrix …

Write a program that lets the user to enter datain a 4 X 3 matrix of integers, and then determine and return the largest element exist in the desired row.The program calls the following functions, which you have to implement: getData – accept a matrix with its size and fill …

Hi all ,how to create multiplication table,based on user input.User enters 1 value in one box,second value in second box and pressses the create table button for output? Regards

Is it possible to multiply a matrix by a variable? if it is then how??

Matrix inverse and lu decomposition using link list

Matrix inverse and lu decomposition using link list.

hey you guys I just want to take this time to wish your guys a merry christmas and a bright and prosperous new year, I know that I will have to do over this programming course in the next semester even though i havent got any result yet. still havent …

I wan to wirte in cout << ... to have the matrix in output in the same format that I wrote it in text file like this: 1 2 3 4 5 2 3 4 5 6 3 4 5 6 7 class Classname { double data[3][3]; public: void Read(char …

I have a 1000x24 matrix in a text file and i want to sum the adjoining columns of the whole matrix e.g. col1+col2, col2+col3, col3+col4,... col23+col24 and store these values in a separate text file. My code runs like this: #include <stdio.h> int main() { int i,j; float a[100][24]; FILE …

hi there people i got a prob with my code in my problem i got a matrix and i need to find the even number or numbers on that matrix (12x30) (by the way is the even minimun or minimums), so here is my function "tempeven" part., the actual issue …

print ("The scope of this program is to multiply two matrices together\ and print the result") while True: matrix1_rows = input("How many rows does matrix one have? ") matrix1_columns = input("How many columns does matrix one have? ") print ("Matrix one is a", matrix1_rows, "x", matrix1_columns, "matrix") print() matrix2_rows = …

Hi! So, I made this code #include<iostream> #include<cstdlib> #include<pthread.h> using namespace std; const int m=6; const int n=5; const int s=5; const int r=8; const int num_thrd=3; class data{ public: int* A; int* B; int* C; int start; }; void* multiply(void* pod) { data* P=(data*)pod; for(int i=P->start;i<m;i+=num_thrd) { for(int j=0;j<r;j++) …

I was doing the class tutorial to have matrix multiplication from two dimensional arrays: X (3x2) and Y (2x3). package t7; public class Q5 { public static void main(String[] args) { int[][] matrix_X = new int [3][2]; int[][] matrix_Y = new int [2][3]; int[][] result = new int [3][3]; for …

Hello, So I was testing my matrix class and the results look questionable and the inverted matrix isn't returning the vertex to it's original value (a seperate issue). Given a perspective projection at 45 degrees with a near of 1 and a far of 1000, the camera at the orgin …

Hello, guys, I encountered a big problem. There is a genereted matrix of buttons: private void Single_Load(object sender, EventArgs e) { //code here for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { //a lot of working code here b[i, …

Hello all! Can someone help with this matrix? it needs to spiral inwards, from bottom right corner, clockwise... I found this code... and it runs nicely but I need to adapt it in some ways: - I should be able to provide number of rows and columns - the grid …

This Project is to implement some procedures doing the following: 1. Represent any graph using these input parameters: • A parameter to represent the graph by Adjacency Matrix, or Adjacency List. • A parameter to indicate whether the graph is directed, or undirected. • A parameter to indicate whether the …

Optimizing Matrix Multiplication One time consuming task is multiplying large matrices. In this post we'll look at ways to improve the speed of this process. We'll be using a square matrix, but with simple modifications the code can be adapted to any type of matrix. The straight forward way to …

I have a base class called Matrix which has a function transpose. I also have a derived class Matrix2 which is inherited publicly from Matrix class Matrix { public: Matrix(); ... Matrix Transpose(void); ... }; class Matrix2 : public Matrix { public: Matrix2(); ... }; In my main code, I …

Hello, So I'm aware that OpenGL is Column major and DirectX is Row major, but how does that translate into a basic 1D array? So given the below visual matrix, what would the first 3 in the array of each platform and which 3 would be the x,y and z …

I have an mxn matrix, that is stored in memory in an array: matA = new float[m * n]; // ... Assign values matA[0] = 1; matB[1] = 2; // ... After I finish with this array, I then need to create very similar array to store a new mxn …

Hi, I'm a beginner with Java, can anyone tell me where my error is, I'm sure there's something I'm missing here with the array logic: public void scalarMultiplication(int c) { for( int i=0; i <values.length - 1;i++){ for(int j=0; j < values.length - 1;j++){ values[i][j] = values[i][j] * c; } …

can any body please tell me that how to take input size of a matrix in 2 d array an then print the table of it.... sample output 1 2 3 4 5 2 4 6 8 10 3 6 9 12 15 4 8 12 16 20 5 10 …

please help me i need a dynamic array that get the information as a matris and give me the vertex degrees (sum every row).and send it to another matrix. #include "stdafx.h" #include<conio.h> #include<iostream> #include <stdlib.h> #include <string.h> using namespace std; int _tmain(int argc, _TCHAR* argv[]) { int k,sum; cout << …

I need to write a code that is gonna remove a whole row/column in a matrix(either static or dynamic matrix)

Write a program that can do the following: addition of two matrices . subtraction of two matrices. multiplication of a matrix by a scalar. multiplication of a matrix by a matrix.

This Program prints the numbers in given array(Row-Major Order) in Spiral order. Ex: Order Is 3*4 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Spiral Order Of Matrix is 11 12 13 14 18 22 26 25 24 23 19 15 16 …

I cant figure out how to check the array for AND and OR. please, help, i got stuck my code: import java.util.Scanner; public class BooleanProduct import java.util.Scanner; public class BooleanProduct { public static void main(String[] args) { Scanner input = new Scanner(System.in); int[][] A = new int[10][10]; int[][] B = …