## Upper-Triangular Matrix Inverse Using Back-Substitution

Inverting an upper (or lower) triangular matrix is a trivial algorithm, due to the nature of the matrix. I am having an issue getting a part of my upper-triangular matrix inversion function to work, and I would like to get it working soon for a personal project. From reading a verbal description abo ...

## Upper-Triangular Matrix Inverse Using Back-Substitution

Inverting an upper (or lower) triangular matrix is a trivial algorithm, due to the nature of the matrix. I am having an issue getting a part of my upper-triangular matrix inversion function to work, and I would like to get it working soon for a personal project. From reading a verbal description abo ...

## Matrix help

I am trying to calculate to the inverse of matrix A.How to call function to main part? How to write the code for a matrix?Can someone help me modify the errors?Thank you very much!-------- #include "matrix.h"Matrix solve(const Matrix& A, const Matrix& B){/*solve A x = B and return ...

## Matrix Multiplication using Multi-Dimensional Arrays

This should be one of our last assignments. Well, not sure, but most probably. As the title implies, we're supposed to write a program using multi-dimensional arrays for a 6x6 matrix multiplication. Here's what I've done. It's almost OK; except the most important part which is the final result. It's ...

## Memory game

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 this: 1 2 3 4 5 6 A - - - - - -- B - - - - - -- C ...

## Return an array after the array inversion

I wrote the attached invert function to invert an array of unsigned char elements "invert(unsigned char array[][])" and everything ist working fine! Now I would like to use this function in another issues to return an array after the array inversion! => inverse= invert(matrix) (I checke ...

## Heap Space Full and some more queries

I'm pretty much of a newbie to Java,in the sense I've just about finished learning all the programming theory and now is the time I need to practise to get a feel of it(I used to do C++ till now). My friends and I was working on this little program that needs to process a 6x6 matrix. Now as soon as ...

## Inverse of a Matrix: Efficient Code (timewise)

I need to find the inverse of a matrix which contains floating point numbers. Can anyone share an efficient (w.r.t. time) code? ...

## matrix inverse

Can someone guide as to how to take input of 3x3 matrix and then print out the inverse using pointer notation (e.g. for arrays) in C++? ...

## Inverse of a matrix

Does knows any library that produces the inverse of a given matrix ?Or is there any C example available ? ...

## Generalized matrix inverse method for balancing chemical equation and their stability

Its my first project. I have to develop a c program which can balance a chemical equation by the method of 'Generalized matrix inverse method for balancing chemical equation and their stability'.But I am using a little different method. where I am not able to find complete step to find rank of a mat ...

## inverse of a matrix

hi, i hv to do the inverse of a matrix by row eliminationplzhelp ...

## Transpose & Inverse Matrix, Matrix Determinant

i need some help/idea in coding a matrix class capable of giving its transpose matrix, inverse matrix & also the determinant of the matrixi am totally a newbie in c++; & learing all the wayi just got the thought that to find the determinant it would be recursive .is it true that the matrix m ...

## 2D Inverse matrix (math wiz)

I need a math wiz.I am trying to calculate the inverse of a 2D matrix (assuming there is one). I found a formula but it is not working correctly. When I multiplying the result with the matrix it should give the identity matrix but does not.In the example 4 and 5 are the x and y translations. The arr ...

## Matrix Inverse using Gauss-Jordan

Thanks in advance.I am working in C++.I am using a std. subroutine for getting inverse of growing square matrix in a while loop.My problem is that when I use the subroutine directly to calculate the inverse for the same set of inputs, it gives correct results however in the while loop when the input ...

## Transpose & Inverse Matrix, Matrix Determinant

i need some help/idea in coding a matrix class capable of giving its transpose matrix, inverse matrix & also the determinant of the matrixi am totally a newbie in c++; & learing all the wayi just got the thought that to find the determinant it would be recursive .is it true that the matrix m ...

## Inverse of a matrix

Can I know how to proceed if I have to find the inverse of a matrix.Its urgent.Sachinp ...

## Inverse matrix Java code help ?

everybody I really need help on a problem in a Java code. Any help would be really appreciated. The problem is to :Write a test program that prompts the user to enter a11, a12, a13, a21, a22, a23, a31, a32, a33 for a matrix and displays its inverse matrix. Here is the sample runs:Enter a11, a12, a13 ...

## does anyone have any code which takes the inverse of a nxm matrix?

? ...

## Ubuntu whats the name of the compiz plugin where you get matrix style letters?

I don't have a clue what it is called, and I want to get it. ...

## C: Matrix SVD code

As part of an assignment for class, I've written a method in C which calculates the SVD of a matrix by the Jacobi algorithm. The code (below) works well enough for small matrices (i.e., up through 5x5, occasionally 6x6). However, when I apply it to a larger matrix, the code is too slow to be useful. ...

## Please Help Matrix Library Needed!!!

I am desperately needing a library that can provide me with basic matrix arithmetic.I am using a MFC VC++7.1 project for which I want the matrix functionality.I Need:>> To multiply matrices>> Calculate determinant of a matrix.>> Calculate inverse of a matrix.>> Calculate tran ...

## The Matrix in my project

I rewrote a project and it compiled sucessfully with no errors. I then went to test the project to make sure it gave me the output I was looking for. It then went matrix. The command prompt was filled with letters jumping on the screen just like in the movie. Can anyone tell me why this is? ...

## Inversing a matrix

I got a little problem with finding the inverse of a matrix when using the BigDecimal type. I mean, I have got a method that finds the inverse of a matrix perfectly with the primitive type double. Here is the method as shown below:import java.lang.*;public class Inverse {public static void main(Stri ...

## Matrix Inversion help :'(

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 2)B2: bezier curve for de ...

## Need advice on matrix input

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 input.I can think of two options here: ...

## Matrix manthra

How to write a programmes to determine the inverse of a given matrix? ...

## need help in matrix of array

Hi, I'm doing a matrix of array n I have to assign each column with a letter or number so that when I shuffle the letters/numbers, it will print out accordingly. this is like the transposition cipher. I have 2 problems.1. my matrix is not printing out like i want it to which is 5x6. instead it's pri ...

## Pascal code for matrix inversion

I have a symmetrical matrix A 8 x 8.First I need to find matrix B = A[sup]T[/sup]*A;Next I need to inverse B and find C = B[sup]-1[/sup];Help please ! ...

## help! matrix

so I need to create a matrix 6x6 and then fill it with random numbers from 0 to 3.... and I need to leave the diagonal of the matrix with 0s...The rows are supposed to be soccer teams so if row 1 wins row 2... the program needs to print a 3... if it's a tie it's 1 and if row 1 loses it's 0... like t ...

## Matrix Linux Distro?

I have a very rough idea for a Matrix Linux Distro. It will somehat resemble the Matrix but take key features from it.1. If one of the operator typed anything in, they could retreive data. WHat if you could do that. Somebody could have a server that has all of wikipedia xml files. Then somebody coul ...

## Matrix Help

#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.op ...

## Ubuntu epson FX-2175 (dot-matrix printer) and SD card reader installation

Good Day! I have installed ubuntu 10.10 netbook remix on my eMachines 350 netbook.. so far, it works good aside from the printer and the built-in SDcard reader. I was wondering if you can help me with these 3 issues:1. I have tried installing the database driver for epson( dot-matrix printers) but i ...

## 7x7 Forced Matrix Script

Does anyone know where i can find a free 7x7 or 6x6 or 8x8 Forced Matrix Script. I bought one online for $99.99 about more than 1 month now and i NEVER got the script. The script has been removed from the server. I send many emails but no response. ...

## Matrix Digital Rain animation in PHP

Here is the end effect:http://www.webdevlogs.com/2007/03/30/simple-version-matrix-like-animated-dropping-character-effect-in-phpLike most animated effects I will ever make, it needs GIFEncoder class (http://www.phpclasses.org/browse/package/3163.html).include('GIFEncoder.class.php');ob_start();$msg ...

## Matrix class

Anybody know where I can get some matrix functions such as Inverse, Determinant etc...Nik ...

## Source code for Inversing a Matrix

I need a source code in c/c++ which finds a inverse of a 3x3 matrix. If anybody have it, I will be grateful if you post it to [email protected] in advance,awaiting an early replies,Kishore ...

## Find the Reduced Row Echelon matrix from Numerical Recipe in C

If anyone is familar with matrix functions from the book Numerical Recipe in C/C++, please help me. In the book, the function GaussJordan(Matrix &A, Matrix &b) can help us find the inverse matrix of A when we passed in the matrix A (we would like to find inverse) and the indentity matrix (I) ...

## Looking for a good matrix package in C++

I've been trying to find a matrix package that's natively C++, rather than (as I have in the past) going with a Fortran or C implementation of LAPACK/BLAS.I've looked at MTL4 and Boost::uBlas. Both seem to be almost good enough. However, since---for now, anyway---my primary need is in computing Gaus ...

## compute matrix inversion

How would I compute matrix inversion.I just need a simple example such asthe inverse of1 2 34 5 67 8 9 ...

## Extracting the pure world transformation from the Opengl modelview matrix

#I'm having a serious problem in OpenGL. Basically, I'm trying to extract the equivalent of DirectX's World Matrix from OpenGL's ModelView matrix. Now, I'm trying to do this by calculating what should be the inverse of the 'view matrix' and multiplying the modelview matrix by it to get the pure worl ...

## Inverse Hough Transform to draw lines

I am performing inverse Hough Transform, mapping parameter space to Cartesian space in order to draw lines in a typical MFC View using OnDraw function. Part of my code looks like this:for(k=0; k<N; k++){ // N is the number of rows in para-matrix spacefor(l=0; l<N; l++){y = (double)0.0;if(p_spa ...

## Ubuntu inverse printing?

I've got this heavy-colored pdf-file with white text on dark-coloured background. I would like to print this without wasting too much printer ink. Now I was searching for a way of how to print the document with inverse colours or grayscale, ideally black letters on white background - as any other sa ...

## Ubuntu 4x4 Matrix class for 3D math

Questions, comments, and criticisms are all welcome. I am open to suggestions particularly on how to improve performance, but please share your other thoughts as well.If you want to view the source at its home, go here:http://code.google.com/p/zero2d/source/browse/trunk/source/Matrix4x4.hYou are wel ...

## Ubuntu Need some matrix help :P

guys. I need some help with solving a set of simultaneous equations. I have three matrices, f, h and V. F and V are known. h is the unknown.fi = f1,f2,...,fnh = h1,h2,...,hjand Vm,n is an m x n matrix.An example of the simultaneous equation looks like this:f1 = hj * V1,j ..................j = 1,2,.. ...

## Ubuntu LCDproc and Matrix Orbital

I have followed the documentation but simply cant get the display to work.Works perfectly under windows so know its not faulty.I have a LK202-25-USB matrix orbital with the latest version of lcdprocMy config file# LCDd.conf -- configuration file for the LCDproc server daemon LCDd## This file contain ...

## Matrix Library [Matrix nversion Problem][Gauss-Jordan]

I've made a library for Delphi to work with matrices.Everything in the library works perfectly as intended save the Matrix Inversion Procedure.I've used the Gauss-Jordan method of Matrix Inversion & everything works excellent for square matrices upto 7x7.From 8x8 onwards, I get a 'Invalid Floati ...

## Ubuntu 11.10 Matrix theme and Screensaver

I guess 11.10 is gtk3 themes compatible only, and gtk2 will not work. Also, 11.10 does not come with a screen saver at all.So i installed XSCREENSAVER, It has matrix theme but it not as good as the "MatrixView GL" which shows the faces of the movie characters in the green letters.So my gue ...

## jQuery Select capital letters

I'm trying to style h1 and h2's on a site so the capital letters andnumbers are larger and a different colour to the lower casecharacters.I'm already using css to style the :first differently and i knowjavascript must be the way to go to apply a style to the rest but I'mstruggling wi ...

## jQuery figuring out cursor position between letters

All,I'm wondering if anyone might have any thoughts about how to go about this (via jQuery or plain js)...I have a div with some text in it:<div id="myDiv">This is some text</div>I want to be able to obtain the "cursor position" if the user clicks anywhere between ...