## 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 ...

## 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 ...

## pca in c

could anyone help me with this code? the algo is alroght when tested manually. guess there is some problem with the declaration part which gives huge values(garbage )thank you #include<iostream.h>#include<stdio.h>#include<stdlib.h>#include<math.h>#include<conio.h>#defin ...

## 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 ...

## Ubuntu How to compute eigenvectors using atlas/ lapack in c?

I want to perform principle component analysis on a covariance matrix. I found online that dsyevr should give me what I want but there doesn't seem to be an atlas wrapper for that. I found the following on http://itf.fys.kuleuven.be/~rob/computer/lapack_wrapper/index.htmlbut when I run it with the c ...

## 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 ...

## 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 ...

## 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 ...

## Ubuntu Matrix Inversion on CUDA

I need to find the inverso of a dense symmetric semipositive definite matrix on the GPU using CUDA.There is a lot of literature out there from suggesting cholseky or LU decompositions to Lanzcos and Arnoldi iterations...Does anyone have an opinion or recommendation on which algorithms fit CUDA best. ...

## 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?

? ...

## 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 ...

## 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? ...

## 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 ! ...

## 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 ...

## 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) ...

## 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 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 Code Error in C/CUDA Program

When I run the following program (taken from the CUDA programming manual) I get the compiler esponse shown below the code#include <stdio.h>#include <stdlib.h>#include <cuda.h>#include <cuda_runtime.h>#include <time.h>// Matrices will be stored in row major order// M(row ...

## 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,.. ...

## 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 ...

## RAW PRINTING - How can I print DIRECTLY to DOT Matrix Printer from jquery?

Hi!I want to sent text with javascript directly to Dot Matrix printerlike Panasonic KXP-1050 without using true type fonts. As I know, thismeans: RAW PrintingI want to use this for printing bills or ticket on continuous-formpaper.There is ActiveX sample for InternetExplorer on this link:http://www.x ...

## N x N matrix using Jquery

i am new to jquery. i wanted to create a n x n table where each cell contains a checkbox. the logic that i want to implement is like a matrix. consider the following example of 3 x 3 matrix for understanding.(0,0),(0,1),(0,2)(1,0),(1,1),(1,2)(2,0),(2,1),(2,2)so there are 9 cells in this example and ...

## Matrix generation in C++

0down voteI have the following code:for (int w=0; w<10; w++){//some lines of codeunsigned long num = x.to_ulong(); cout << "Decimal form is: " << num << endl;} Now what I want is, to make a matrix which will have these values of num, column wise. For example, matrix[i] ...

## maximum, minimum and average of a matrix?

std::vector<std::vector<unsigned long> > matrix(15); // 15 rowstypedef std::vector<std::vector<unsigned long> >::iterator it_type;it_type row = matrix.begin();for (int w=0;w<10;w++){//some lines of codeunsigned long num = x.to_ulong(); cout <<"Decimal form is: ...

## Enter the Matrix-not working

I've installed Enter The Matrix game and when I try to start it I get the message "Fullscreen mode not found". Does anyone know why I can't play it? My Operating System is Windows XP. Also, I can't play Yahoo Games over the internet. It says I need Java Virtual Machine and I get the option ...

## Drawing vector to the 2D matrix with image data

I have 2D matrix with greyscale image data, in particular point I have computed vector, which contains gradient in this point (via Sobel operator, it has 2 values - difference in x and in y axis), and I store this gradient vector like perpendicular vector to this gradient, so I have the vector, whic ...

## Ubuntu Matrix Desktop Theme

i saw some videos in youtube where the ubuntu desktop is matrix style. i think its called a GTK+ not sure. how can i get a full matrix theme for my ubuntu 10.10 desktop? ...

## inverse of "onClick" js event for radio

<input name="radiobutton" type="radio" value="radiobutton" onBlur="aa.style.display='none'" onClick="aa.style.display='inline'"><input name="radiobutton" type="radio" value="radiobutton" onBlur="ab.style.di ...

## how to print on pre-printed reciept using DOT matrix printer

i want to print some data using dot matrix printer on pre printed receipts,am using PHP and MYSQL database am getting data FROM DB , now am not getting how to align it, how to print using java script, exactly on those boxes on pre printed reciepts , please any provide me the code ...

## IBM FC HBA Card Mapping Matrix with Emulex Model,

I am working with different pSeries server which has different HBA model. Now I would like to know or search the mapping matrix between IBM HBA card and corresponding with Emulex card. For example;IBM 6227 HBA Card is equivalent to LP11000 model.Any help will be highly appreciated ...

## Maximum matrix size

while writing one of my funny programs, I tried teh declaration X[25][25][25][1024] and then the linker made a really nice thing - just hang up. Every time I try to do that it keeps on doing the same stuff. I assume that I exceed the size limit for an allocated matrix. Can anyone tell me what is the ...

## boost: swap two columns of a matrix

I'm trying to swap two columns of a ublas matrix likematrix <double> m_mat(2,2);but since they are row-major I can't find a solution (excepted for an ugly cycle)Do you have any other better solutions in mind? ...

## Boost library: sort a matrix by a column

all, don't know whether this is the right section but I have a big problem:I am using boost C++ libraries to work with matrix data... I now need to sort a matrix by the data in a columnFor example:1 30 2sorting increasingly by the second column:0 21 3std::sort can not do the job because it would sor ...