[matrix-multiplication] Forum Topics

Hello everyone, I have been trying to get this code to work, but so far all it does is tell me : Input the order of the Matrix(Keep it Odd):3 1.11286e-307 1 0 1.11341e-308 1.11286e-307 0 0 1.11343e-308 1.11286e-307 0 0 1.11342e-308 Press any key to continue . . . …

hello, I have a matrix (string array that have words) and I want to write a function that receive the word and consider whether the word existed or not in the matrix I"m trying to write the function, but i didn't succeeded. this is my code [code] int CheckWord (char …

Hi! I am trying to make a function, which transposes matrix. When declaring it, i get this error, which i mention in the title. I`ve tried to find the solution myself, but i am quite new to C, so i don`t even understand what does this error mean. (I know …

Hi, i'm looking for some library that provides solving matrix determinant. My matrix contains complex numbers (complex.h). Please write me some hints

Hi all, I have tried to write a program which can add two matrix. It is running well....but when I am printing out the resultant matrix it is just showing the address of the resultant elements. For convenience, I have posted the output also. [B]Program:-[/B] [code=cplusplus] #include<iostream.h> int main() { …

I'd like to write a matrix evaluation tool.(add, multiply, inverse etc.) So I need some way to manually input the values of a matrix. I don't want the input to be console like : "Give val for r1,c2" or something like that. I want a forms app with a table …

[COLOR="Red"]Problem:[/COLOR] Write a program that displays a single character in all possible combinations of foreground and background colors (16x16 = 256). The colors are numbered from 0 to 15, so you can use a nested loop to generate all possible combinations. Here is what I tried, but it doesnot come …

I know there are multiple threads on Matrix Multiplication but all of them are either different from what i need, or are unanswered. I am trying to multiply two N x N matrices. The two matrices and N are all found in a file via argv[1]. I have spent hours …

can someone help mi out with how to write a simple(2X2) matrix....I need help only with the loop used..... I got a wrong answer with what i got below [code=cplusplus] const int Row = 2; const int Col = 2; int main() { int MatrixA[Row][Col] = {1,2,3,2}; int MatrixB[Row][Col] = …

Hi, i have bieng trying to write a method which takes a listbox index (1D array) and find the corresponding 2D index. I did this code with some help which get the 1D index of a 2D array. Now i need to do the reverse from listbox index (1D) and …

I need help to get started with this. Any one that knows any examples I can get inspire from? :) Im going to create a game that plays Memory. The user should try to solve a 6x6 matrix by matching words in different cells in a matrix.It should look like …

Hi All, I'm currently working on my project (which try to perform degree reduction for a Bezier curve). I've spent a long time trying to find library or useful class to help me perform matrix inversion. For example degree reduction in Bezier's curve (let's say from degree 3 to degree …

okay, this is the problem (variation of the knapsack coins problem): you've got 4 coin types: 1 cent, 2 cents, 5 cents and a quarter...infinite amount of each. I'm supposed to find the number of ways in which the coins can be arranged to form the sum of some integer …

Hey all, i'm writing a small program that multiplies matrices. The number of matrices is taken as an input, which means it varies according to input. so i'm having a problem on how to dynamically declare several matrices. is it possible to do that?

Hi, I'm doing a low-mem implementation of a matrix, than can contain values from 0-4, this is fine for my program. I input 4 values (each 2bit) into 1 char(8bit). I'm using bitpatterns and shifting to extract values. But this is of cause hidden from the user. I've done everything …

Hello there people! :D I am working with a lab, where we are supposed to finish a Memory Game. We are supposed to create a "Make Move" function, and that it behaves in a correct way. It is supposed to get the X,Y coordinates of where the user klicked, calculate …

anyone can help me? please problem: write a program that creates three processes and performs matrix operations at the same time. each process performs a different matrix operation. the program reads three matrices from a text file. the size of the matrix can be of any valid size. use two-dimensional …

Hi everyone, i have a problem with constructing a big matrix from small matrices. could you please help me figure out? my problem is: i now have 200 matrices (1000 x 5) => i now want to build them in a big matrix (1000x1000 =(5 x 200)) just store the …

Hi everyone, I got problem with coding of matrix-matrix multi plication; Please help me to figure out this my problem is: Having a matrix, U2[k][i][j], with dimension of 9081x84 and other matrix, U[m][i][j], with dimension of 9081x4 i now want to multiply transpose of A with B, following is my …

HI guys i am a beginner c++ programmer so hopefully this one will be easy for the gurus. i am trying to write a class to do matrix multiplication and then use it. In the class are 5 functions: one to define the dimensions of the matrix two to enter …

I have created some subroutines and User Defined functions in Excel's VBA. Internal to them, I have created arrays. I would like to use Excel functions on these arrays, but can not seem to. For example I would like to use the determinant function, which is mdeterm in excel. If …

Hi, I have a program: [code] def AdjacencyMatrix(dim, pairs): matrix1 = (zeros((dim,dim))) for (first,second) in pairs: matrix1[first,second]=1 matrix1[second,first]=1 print '\nAdjacency Matrix\n' print matrix1 [/code] But I get an error: TypeError: 'int' object is not iterable Can anyone help? Thank you!

Hello, i have some problems implementing the following pseudo-code. Te problem is that in Pascal i can return user defined data structures (in this case: matrix), and i also tried to return it as a parameter with "var" but it gave a stack overflow error. Anyone can help me? pseudo …

Dear all , I am not very much efficient in perl . I used to write small script of code usually by using file handler . I have written a code for multplication of 2*3 matrix . I want to use this code efficiently so that it can be any …

Hello, Okay I'm stumped and can't figure out why this code chunk isn't working properly (works on square matrixs; everything else doesn't work).... uint8 * imageTranspose( uint8 *im ){ uint8 *im_transpose; int x, y, org_offset, tran_offset; int im_size = dims[0] * dims[1]; if ( (im_transpose = malloc(sizeof(uint16) * im_size)) == …

[code]#include<stdio.h> #include<conio.h> #define MAX_ROWS 10 #define MAX_COLS 10 void add(int a[][MAX_COLS], int b[][MAX_COLS], int result[][MAX_COLS]); void displayValues(int(*)[MAX_COLS]); void diff(int a[][MAX_COLS], int b[][MAX_COLS], int result[][MAX_COLS]); void main() { int val; int i,j; int choice; int cols,rows; int operation; int table1[MAX_ROWS][MAX_COLS]; int table2[MAX_ROWS][MAX_COLS]; int result[MAX_ROWS][MAX_COLS]; clrscr(); printf("Press 1 to enter values for …

hi to everyone, In this semester we are having a class concerning High Performace computing / Parallel processing... In short i have the following questions: --- We are using pthreads and C. I think that i can use pthreads in c++ code but is there any way to use threads …

Hi, i have a function which is supposed to compare two matrices, however i does not work properly. I get this compile warning. [code] warning: control reaches end of non-void function [/code] Here is the function. [code=c++] bool matrix::isequal(const matrix& ob3) { for (int i = 0; i < rows; …

Hello everyone; I've got a project at hand that I must pass and I have to admit, I am not good at c++. No excuse, though. I've got all day to get this thing done. Its a project that asks me to; [I]1. Input 2 matrices from 2 files!!!!!

I am trying to now multiply matrices stored in 2d arrays. When the program runs i get segmentation fault, using DDD i found the point where it stops after 3 loops. [code] int i,j,k; float** matrixc = new float*[rows]; if (matrixc != NULL) { for (int x = 0; x …

[code] class Program { static void Main(string[] args) { int m = 0; int n = 0; Console.Write("Enter M : "); m = Convert.ToInt32(Console.ReadLine()); Console.Write("Enter N : "); n = Convert.ToInt32(Console.ReadLine()); Console.Write("{0} x {1} and {2} x 1 dimentional two matrix will be multiplied.\n",m,n,n); Console.Write("Enter {0} x {1} dimentional matrix …

Hello all, I am badly in need of a simple to use Matrix library for C++ that can handle complex data type.. I am working in Bloodshed Dev C++ under windows XP. Waiting anxiously if anybody can be of help!! Imtnan

please help to with this program by mainly using arrays and pointers ,... i need this program to check 2 matrix files "if they contain any character and if they contain cout<<"invalid"; " and to open them from .txt file Help with Code Tags cplusplus Syntax (Toggle Plain Text) [code] …

please help to with this program by mainly using arrays and pointers ,... i need this program to check 2 matrix files "if they contain any character and if they contain cout<<"invalid"; " and to open them from .txt file [code=cplusplus] #include<iostream> #include<fstream> #include<string> #include<cmath> using namespace std; int main() …

I want to know how to develop a matrix calculator that preforms basic matrix operations usin g arrays and/or pointers. Iwant a calculator to do addition ,subtraction ,multiplication ,transpose,checking enquality, checking properties and matrix power & the program will read the data from a file & check if the data …

I need to make a method that receives the matrix values as a string as [code=c#]"[ 1/4 1/3 1/2 ; 2/3 1/5 2/5 ; 1/6 1/5 7/8 ] "[/code] and initializes the matrix ( ex. “[ 1/4 1/3 1/2 ; 2/3 1/5 2/5 ; 1/6 1/5 7/8 ] “) I …

Hello there, I am trying to build a square matrix of the type Double, with the following code: for( i = 0; i < weightVector.length; i++) for( j =0; j< weightVector.length; j++) { weightMatrix[i][j]= weightVector[i]* weightVector[j]; if(i==j) weightMatrix[i][i] += 0.0001; } The problem is each time the vector "weightVector" has …

hi i am new to eclipse i wrote a small programm in c++ using operator overloading if i compile normally no error but if compile through eclipse it is giving erorr message like "operator not mached " /*************************************************************/ this my main.cpp ************************************************************/ [code=cplusplus] #include <iostream> #include"use.h" #include"friend.h" using namespace std; …

Hello everyone! I am writing a function to multiply two matricies together. I have written a simple algorithm for a matrix 3x3 - [CODE]void multiply() { int a[3][3], b[3][3], c[3][3], i, j , p, val = 0; a[0][0] = -1; a[0][1] = 0; a[0][2] = 1; a[1][0] = 5; a[1][1] …

I am not able to figure out how to calculate the determinant of a matrix whose size and elements are to be taken from user. Could someone help me !!

i hav coded a matrix class and its member functions (many of them are overloaded ones)...now in a function..for eg. function of matrix addition.. [B]after the addition i want to return the local object "result" through a pointer (and not call by value)..however i aint getting d values of the …

I'm working on a matrix addition/multiplication/transpose/inverse program and after entering the values of matrix A, I don't know how to call these values. [CODE] int setMatrixA(int r1, int c1, int i, int j){ printf(" Enter the number of rows:\n"); scanf("%d", &r1); printf(" Enter the number of columns:\n"); scanf("%d", &c1); for(i=0; …

Alright, so I am trying to create a program that will take a [m][n] Matrix and multiply it by a [n][p] Matrix, filling each matrix with increasing values. I am having a problem with my function, prototype, and call. I keep getting the "...not declared in this scope" error and …

Hi, I should printout the value(s) of the "sum" of the end of the code... But i don't know...:( I am not good at C++. Please help! The code is not so difficult: it generates random 3 dimensional vectors, e.g. number of 5. Then makes a matrix of 3x3 from …

Hello All, I'm creating a program that reads a file.dat and I need to input that in a matrix, it can be 2x2,3x3,4x4 or 5x5. I'm not exactly sure how to do that. The file.dat looks like this: 2 1 2 3 5 3 1 3 8 5 7 3 …

Hi there.This is my first post here.I need help urgently. I getting desperate because I got a deadline for a project in 3 weeks time.I'm trying to do a 2 X 2 matrix multiplication applet that simulate systolic architecture.Should be something like the Wallace Tree Simulation. It can be seen …

hi i want to do operation on image...i have extracted the pixels of small window of 15 X15.. now i want to save that matrix in ms access 2003. for the further opeartions.... have the data in 2-d array say a[15,15], and since there is no build in data type …

Hi I'm adapting some code I've written using 2d arrays (to represent matrices) to handle large arrays such that double matrix[][] goes to double **matrix and then I'm using malloc. It seems to work fine for part of my program up to where I have to find the matrix transpose …

Guyz I have again got a problem with functions. [ICODE]"" Write a function to input matrices"" [/ICODE] Or how can I input using fuctions ?? is it possble ?? so far I have developed a few lines. [CODE] //fuction to input a 2D-array. int multi_array(int r , int c)//r is …

hi i have a matrices Question should be programmed using C++ so the program is ... you should make the user enter the size of the matrix nxn,,, then he should enter the elements... and then the program should give the user MR infinity....which we use in paths and relations …