[matrix-multiplication] Forum Topics

Hi! I try to implement a matrix template class which inherits the vector of vectors. The message I get: "error C2679: binary '=' : no operator found which takes a right-hand operand of type 'const Vector<T> *' (or there is no acceptable conversion)" (When I call the alternate matrix constructor, …

[url]http://img200.imageshack.us/i/screenshot20110111at115.png/[/url] Thanks in advance fellow geeks!

[CODE]#include <iostream> #include<cstdlib> #include<iomanip> using namespace std; int* userInput(int mat); void multiply(int mat, int* array); void print(int **mult, int **divides, int mat, int row, int col); //Main method, calls IO and handles the case for only 1 matrix. int main() { int mat = 0,i,j; int arrayA[mat][mat]; cout << "Enter …

Hello everybody! Im a new to this site. I wonder how can I get the row dimension of a matrix. For example i have a matrix double[n,m] and i want to get n provided m is unknown. So what property of method should i use??? Thank you

hello. i have been studying C++ and i programmed the following. can any one convert this in C language please it is urgent. [code] # include <iostream> # include <iomanip> # include <windows.h> #include <conio.h> using namespace std; void pw (int,int); void swap( double&,double&); void main() { double arr1[10][10],arr2[10][10],arr3[10][10],d,d1,d2,d3,X,Y,Z,x1,x2,x3; int …

I am trying to create an abstract data type for matrices. I have a function matrixInit to dynamically allocate memory for the structure and for the array. matrixCopy copies one matrix into another. there are functions to subtract, add and multiply matrices that return a pointer to memory where the …

Frame complete game, only the outer edges of a square drawn on the table is a game played with 2 players. Sequence of a square drawn from the player wants to draw a non-edge. Underline that this edge of the square is not the last edge of the square is …

Hello )) please tell me - where's the bug in this code - [ICODE] main() { short int n = 0; n=[U]getdet[/U] ( **m , n); } [B]short int ** [U]getdet[/U] (short int **m , int n) /*вычисляем определитель матрицы*/ { short int c=0; if (n==1) return **m; }[/B][/ICODE] compiler …

I need to write a code that receive from the user numbers (must use with EOF) and store them into a matrix. There are some more requirements: 1. Matrix must be only N*N size, while N will be defined at top. 2. If user is trying to enter more than …

i wann multiply two matrix but the part of given code is not working...i wanna input the value from the user using pointers.. [CODE]#include<stdio.h> #include<conio.h> void main() { printf("This is matrix multiplication program"); printf("\nEnter the dimensions of two array "); int Row1 = 0, Col1 = 0, Row2 = 0, …

Hello, well well, I'm all new with Python, actually I've heard of it for the first time 2 or 3months ago... I have to do a project for my class (I'm not even in Computer Sciences)and I need some help... I start to be familiar with different expressions of the …

Hokay so, i gotta make a program that reads an adjacency matrix from a data file and then outputs which nodes are adjacent to the others. In the data file there are 0's and 1's, 0 means that they are not connected and a 1 means that they are. I …

Hi, I'm trying to get this program to read a file which contains a matrix. I am trying to output a text file which has the matrix of the input file but with the average of each row. Every time I enter the name of the inputFile and the outputFile …

hi! any body tell me any easy matrix program which is correctly working. please..... i am new in c#.

Plz send me the Gauss jordon code snippet or Hint that how to write the code for it. i.e i want for nXn order. Waiting for ur post. Bye

Hello All, I wrote the following code to access a file, assign pointers to the contents of the file, display the file as a matrix, read the last line as a separate matrix, then I am supposed to perform matrix multiplication on the two aforementioned matricies. I have the first …

i need answer for my asingment,please.....please using two dimentional arrays, write a function which multiplies an mxn matrix of integers by an nxr matrix of integers. Use global constant declarations before the main program to give test values for m,n and r, example input/output mingh be INPUT FIRST (2x2) MATRIX: …

Hi, How can I print this figure if I have an array like this? It should be a for-loop but don´t know how. [CODE] labyrinth = \ [[0,0,0,0,0,0,1,0], [0,1,0,1,1,1,1,0], [0,1,1,1,0,1,0,0], [0,1,0,0,0,0,0,0], [0,1,1,0,1,1,1,0], [0,0,1,1,1,0,0,0], [0,1,1,0,1,1,1,0], [0,1,0,0,0,0,0,0]] [/CODE] figure: ############. ## ## ##. . . . ## ##. . . ## #### …

Dear all, Im trying to do a matrix multiplication with complex number. I have 2 structures: [code=c] /* Structures */ typedef struct complex { // Complex structure = real and imaginary part. double re; double im; } Complex; typedef struct complex_matrix { int rows; int cols; Complex **mat; } Complex_Matrix; …

[CODE]namespace week4Matrix { class Program { int[,] a; int[,] b; int[,] c; static void Main(string[] args) { } public void TransposeMatrix() { for (int i = 0; i < a.GetLength(0); i++) { for (int j = 0; j < a.GetLength(1); j++) { c[j, i] = a[i, j]; } } } …

Hello all, I'm having trouble with making a 2d vector array class. Would anyone have time to help with a couple of questions? I think my problem is with overloading (). I notice that this: [CODE]template <typename T> T& Array2d<T>::operator() ( int x, int y) { if( x >= rows …

could you please help me? i need to write a program, no dynamic allocation, using classes and arrays to multiply only 3x3 matrices only

I would like to achieve a speedup for this program. I was wondering how to get started. I was thinking of maybe using pointers. Any hints would be great. [CODE]void test() { int i, j, k; for (i=0; i<N; i++) { for (j=0; j<N; j++) { for (k=0; k<N; k++) …

This is what my program is supposed to do: [LIST=1] [*]Print the vector (m1) [*]Print the matrix (m2) [*]Multiply the vector and matrix together and display results [/LIST] The only thing wrong with my program is that I can't quite get the right results displayed. The correct display of values …

[code] #include <fstream> #include <iostream> #include <cstdlib> using namespace std; int main () { char out_file_name[15]; cout<<"Enter the name of your output file: "; cin>>out_file_name; ifstream input; ofstream output; cout<<"Begin editing files.\n"; input.open("Input.txt"); if (input.fail()) { cout<<"Input file opening failed.\n"; exit(1); } output.open("output.txt"); if(output.fail()) { cout<<"Output file opening failed.\n"; exit(1); …

my program is made to enter a matix,in which it finds all of the column`s minimum numbers which are[COLOR="Red"] >0[/COLOR] and then put them under the last row.i have sucseded entering the array and puting it out,but i think my IF is wrong somehow.I have tried initialising the last row …

Hi Everyone I am currently writing a program in C++ which uses a very big matrix, I have been told to try and store the matrix in disc and try to retrieve only the chunks of the matrix I will be needing and keep swapping them around. The problem is …

I'm currently having an issue with moving the camera around the z-axis (roll). For debugging purposes, I have an object with which I've tested with all 3-axis rotation and movement and it's working as expected; the object in question as well as the camera class superseed a positions class for …

I was given a set of binary number to assemble it into gray code sequence: 111 000 110 011 001 100. Is their a specific way I have to do this? From What I read in the internet I think the following solution would be this: Gray Code 000 001 …

hi, I'm creating a game with pygame and i want to create a matrix that will represent the map(where each tile will be). my pygame code is ok, because if i create the map without loading the tilemap (the matrix file) the game runs ok. that would be good but …

I'm trying to write a matrix multiplication program that takes in an int N on command line, creates two NxN matrices A & B, randomly populates them with ints, and then computes the result of multiplying A and B. I wanted to avoid malloc, but the first version started segfaulting …

I store matrix entries in std::vector<double>, such that the reading is row by row. This means, for matrix 1 3 4 8 9 3 3 6 8 1 1 2 2 0 9 8 7 6 the std::vector<double> would have entries: {1,3,4,8,9,3,3,6,8,1,1,2,2,0,9,8,7,6}. To transpose the matrix I use the naive …

Given the matrix representing a relation on a finite set, determine whether the relation is reflexive or irreflexive.. Need your help!

Cn somebody give a matrix program which recognizes if it's REFLEXIVE or IRREFLEXIVE?

Hello. For 2D matrix multiplication, i tried a new method, which uses only 2 for loops. (im basically using a 1D array to access the elements). Here is the code: // Mutiplication.cpp : Defines the entry point for the console application. // [CODE]#include <stdio.h> int main(void) { int a[] = …

I'm working on a code that will multiply two matrices and print the result. This specific code is meant to ask the user to define the bounds of the matrices (i.e. the (M)x(N) of the matrix) then ask for each matrix by row. The trouble I'm having is that I …

Below is the function I copied to get the answer...so plz do tell us the simple method for this..... [CODE]int ** addmatrix(int **a,int x1,int y1,int **b,int x2,int y2) { int i,j,**c; c=(int**)malloc(x1*sizeof(int*)); for(i=0;i<x1;i++) *(c+i)=(int*)malloc(y1*sizeof(int)); if(x1==x2 && y1==y2) for(i=0;i<x1;i++) for(j=0;j<y1;j++) *(*(c+i)+j)=*(*(a+i)+j)+*(*(b+i)+j); return(c); }[/CODE]

Hello, I'm trying to write a program for matrix multiplication I keep getting an error.... Please help [code] class Matrix { private int numRows, numColumns; private double x[][]; public Matrix(int m, int n){ numRows = m; numColumns = n; x = new double[numRows][numColumns]; for(int i = 0; i < numRows; …

for (i=0, i<imax, i++) { // ... Array< complex<float>, 3 > matrix(x,y,z); // x,y,z are large and vary in each loop // ... // matrix <=== values for each element assigned // ... // now want to write "matrix" in a single binary file. // later, this matrix can be …

I used this to write the matrix into a file: int Nx, Ny, Nz; Array <complex<float>, 3> matrix(Nx, Ny, Nz, ColumnMajorArray<3>()); ...get matrix data... fstream outbin(outname.c_str(),ios::out|ios::binary); outbin.write(reinterpret_cast<char *>(matrix.data()),sizeof(complex<float>)*Nx*Ny*Nz); outbin.close(); Then, I used this to read this matrix, works fine, values and orders are correct too: Array <complex<float>, 3> matrixb(Nx, Ny, …

I am using [URL="http://msdn.microsoft.com/en-us/library/system.drawing.drawing2d.matrix.aspx"]matrix class[/URL] to perform image transformations.Problem is that I want to do a perspective transform, which requires a 3x3 matrix. [COLOR="Green"]system.drawing.drawing2d.matrix[/COLOR] behaves like a 3x2 matrix. Here's a short code extract of what I use the matrix for: [CODE] Graphics my_graphics= Graphics.FromImage(my_image); my_graphics.Transform = my_matrix; my_graphics.DrawImage(my_image2, new …

I'm trying to do addition of matrices using pointers. But, in 3x3 matrix, only the first row of the matrix gets added, while the rest are zero. Please help me correct this. Thank You! My code is as follows :: [CODE] #include<stdio.h> #include<conio.h> int a[10][10],b[10][10],c[10][10]={0}; int i=0,j=0,k=0; int r1,c1,r2,c2; void …

sir i want to multiply two matrix 3-by-3 using recursion function please send me source code on mail address <<snip>> thanking you

#include <iostream> using namespace std; int main() { int i,j,k; int Matrix1[3][3] = { {1,2,3}, {4,5,6}, {1,2,3}, }; int Matrix2[3][3] = { {3,2,1}, {6,5,4}, {3,2,1}, }; int Matrix3[3][3]; cout << "Matrix 1: " << endl; for( i = 0; i < 3; i++) { for( j = 0; j < …

Hi all! I really really need your advice here! So please do reply me. Your help is greatly appreciated!! I need to do a translation here: X Y Z -3.621 15.574 14.908 (file1 - 2nd row) -3.441 15.678 14.859 (file2 - 2nd row) I need to move file 2 coordinates …

Hi, I am trying to obtain the equation of a best fitted plane to a cluster of 3d points in python. I run into a problem when all of my points are on the same plane, for example z=0. My minimum eigenvalue obtained from my matrix ends up being 0 …

Hi! I am using the Boost uBlas interface for matrices and I'd like to be able to create matrices with the following syntax (or similar): [CODE] typedef boost::numeric::ublas::matrix<double> Matrix; //for clarity Matrix mat = {[1,1,1],[2,2,2],[3,3,3]}; [/CODE] The actual matrix should be 3x3 and look like the following - 1,1,1 2,2,2 …

Hi everyone, Can someone help me to solve this question? im attaching the question as i cant post the matrix here. Thank you

I am trying to create a simple matrix class. When an object of class matrix is created it should be able to create any nxn size matrix. The problem I am finding is that there doesn't seem to be a simple way to make a class with a dynamic 2D …

Greetings! The below is an example of a text file from PDB. ATOM 2 CA ASP E 423 [B]-50.931 46.011 -16.062[/B] 1.00153.24 C ATOM 3 C ASP E 423 [B]-51.314 44.692 -15.381[/B] 1.00152.70 C ATOM 4 O ASP E 423 [B]-52.175 44.673 -14.497[/B] 1.00153.08 O ATOM 5 CB ASP E …