C/C++ :: Program To Calculate Inverse Of Matrix

Apr 3, 2014

I write this code for Inverse of matrix in C language . But there is error in determinant function that say "can not convert 'float' to 'float(*)[20]' for argument '1' to 'float determinant(float(*)[20])' " ....

/* a program to calculate inverse of matrix (n*n)*/
//actually one of the way to calculate inverse of matrix is : A^(-1) = 1/|A| * C(t)
that A is matrix and c(t) is taranahade A

#include <stdio.h>;
#include <conio.h>;
#include <string.h>;
#include <stdlib.h>;
const int max=20;
int i , j , n , k , size=0 , row , column ;
float num , det=0 , inverse_matrix[max][max] , matrix[max][max] , new_mat[max][max] , m_minor[max][max] , m_Transpose[max][max];

[Code] .....

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C++ :: 4x4 Matrix Inverse Implementation

Sep 19, 2013

I'm implementing a 4x4 matrix class and all is going well until the inverse function turned up. I'm trying to implement the inverse function, but I can't seem to get my head around it.

I've tried the internet, but found nothing useful. Also, I've looked into source code of other programs/libraries that implement a matrix class, but the code is unreadable.

How I can implement this damn 4x4 inverse function? I know the process of inversion, but putting that process into code is proving quite a challenge.

In addition, I do have some code, but it's unmanageable and inefficient at the moment. If you want to see it, just ask.

Additional question(s): What applications does the inverse matrix have in 3-D?

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C++ :: Calculating The Inverse View Matrix From Computer Graphics

Feb 6, 2015

How do you calculate the inverse view matrix?

Is that really just the inverse of the view/camera matrix?

Or is that something else?

I have seen articles online on the overall mathematical theory behind it but I am using the GLM math library and it has this nifty glm::inverse() function.

I was just curious if I can do a glm::inverse(ViewMatrix) and that would be correct.

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C :: Store Data In Binary File Then Use It To Find Inverse Of Matrix Form Of Data

Dec 6, 2013

I need to find inverse of a matrix data in binary file should be used to form matrix.its not finding inverse correctly rest is working good.

Code:
#include <stdio.h>
void createbin();
void display();
void inverse();
int main()
{
createbin();
display();
inverse();

[Code] ....

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C++ :: Calculate Product Of 4 Vertical Values In Matrix

Jun 1, 2013

I am attempting to create a program which calculates the product of 4 vertical values in the matrix. The numbers are supposed to be randomly generated and the size of the matrix is given through the command window.

However I seem to have either not pointed my matrix through all of my functions correctly, or my logic is off somewhere as I keep getting this output regardless of the size of matrix I put in:

"the location of the highest horizontal line product is: 5 0 and is the number: 0

The overall max value is 4196352 at the above coordinates."

using namespace::std;
//srand(time(0));
int h_line(int**, int, int);
int v_line(int, int,int);
int diagnol_left(int,int,int);

[Code] .....

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C++ :: Take (mathematical) Inverse Of Array?

Feb 17, 2014

I need to take an array, and get the inverse of it (basically, just how you would take an inverse of a function in math). I need to do it where, if a[i] = x, b[x] = i. I would just copy from array a to array b in a function.

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C :: Print The Inverse Number On Screen

Dec 25, 2014

Print the inverse number. Ex: 2178*4=8712

Write down a program which can satisfy the prerequisite and print out the screen.

The answer is:

Code:
void inverse2 ()
{
int i,j;
for (i=1000;i<=9999;i++)
for (j=1;j<=9;j++)
if (i*j==inverse (i))
printf("%5d%2d",i,j);
}

I can't understand the double for loop.

for (i=1000;i<=9999;i++)
for (j=1;j<=9;j++)

And The meaning for

i*j==inverse (i)

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C :: Adjacent And Opposite - How To Get Tangent Inverse

Aug 12, 2013

I have an adjacent and opposite. I think I can use: tan(x) = opposite / adjacent but how do I get the tangent inverse?

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C++ :: Forming A Matrix Multiplication Program

Oct 9, 2013

I just started Linear Algebra for my programming degree and to full understand everything I want to put it into code and make my own "matrix calculator." I have all the theory but I am having issues keeping the matrix variable and moving it around the class' functions to create it and output it. Once I know I have it saved I think I can get the addition/multiplication to work. Here is the code I have so far:

#include <string>
#include <iostream>
using namespace std;
class matrix {

[Code] ....

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C/C++ :: Program To Sum Rows And Columns Of A Matrix?

Apr 23, 2014

Im using apmatrix and im inputting values into a 4 by 4 matrix and im getting all these errors that have nothing to do with my cpp file so im guessing its apmatrixies fault. Also I put in the cpp and header file of both apmatrix and apvector into my project folder. Heres my code:

// Libraries
#include "apmatrix.h"
#include <iostream>
//cout, standard output
// <<, stream insertion operator

[code]....

My errors are:

error C1189: #error : The C++ Standard Library forbids macroizing keywords. Enable warning C4005 to find the forbidden macro.c:program filesmicrosoft visual studio 11.0vcincludexkeycheck.h2421TheMatrix

4IntelliSense: identifier "EMIT" is undefinedc:Program FilesMicrosoft Visual Studio 11.0VCincludeyvals.h4911TheMatrix

and a bunch are repeated

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C++ :: Program To Find Transpose Of Given Square Matrix

Mar 24, 2013

I want to find transpos of square matrix.but my program does not run complete.

Code:
#include<iostream>
using namespace std;
const int size=3;
void read(int a[size][size])

[Code] .....

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C++ :: Program Matrix Multiplication But It Work Not For Big Arrays?

Mar 9, 2014

I have a program matrix multiplication but it work not for big arrays. n should be bis 200.

#include <iostream>
#include <time.h>
#include <cstdlib>

[Code]....

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C/C++ :: Program That Reads 3-by-4 Matrix And Displays Sum Of Columns

Nov 18, 2014

I'm not sure why Im getting a wrong Sum. of the Columns.

Write a method that returns the sum of all the elements in a specific column in a matrix using the following header:

double sumColumn(const double m[] [SIZE], int rowSize, int columnIndex)

Write a test program that reads a 3-by-4 matrix and displays the sum of each column. here is a sample run:

Enter a 3-by-4 matrix row by row:
1.5 2 3 4
5.5 6 7 8
9.5 1 3 1
Sum of the elements at column 0 is 16.5
Sum of the elements at column 1 is 9.0
Sum of the elements at column 2 is 13.0
Sum of the elements at column 3 is 13.0

#include <iostream>
using namespace std;
const int SIZE = 4;
int rowSize=3;

[Code].....

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C++ :: Program To Print Upper Half Of Matrix

Jan 3, 2015

This is a program to print upper half of the matrix.

#include <iostream>
using namespace std;
int upperhalf(int n, int apu[n][n]) {
cout<<"The upper half of the matrix is :

[Code] ....

the compiler is giving these errors:-

sh-4.2# g++ -o main *.cpp
main.cpp:4:31: error: use of parameter outside fun
ction body before ']' token
int upperhalf(int n, int apu[n][n])

[Code] ....

I dont know where i am wrong.

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C++ :: Using OOP To Implement Matrix Class That Provide Basic Matrix Operations

Mar 27, 2013

i want to know how i can solve this question? do i need to create a class or write the program codes.

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C :: Matrix Program - Read Two Saved Text Files

Jan 29, 2013

Basically I am to create a program that will read two saved text files; one is [2x4] ~ (matrixA.txt) and another is [4x2] ~ (matrixB.txt). The program is supposed to read both text files, multiply them, and generate an output that will be saved as ~ (matrixC.txt).

So here is my horrible attempt at it:

Code:

#include <stdio.h>
int main() {
FILE * fileA;
FILE * fileB;
FILE * fileC;

[Code] .....

And these are the compile errors...

C:UsersLeDerpHW1.c: In function `main':
HW1.c:27: parse error before `int' //Line 28
C:UsersLeDerpHW1.c: At top level:
HW1.c:34: warning: parameter names (without types) in function declaration //35
HW1.c:34: warning: data definition has no type or storage class //35
HW1.c:35: parse error before `for' //37

[Code] .....

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C :: Program To Find Largest Number From 5 Row By 5 Column Matrix

Feb 27, 2013

I made the code that stores and prints 5 row by 5 column values but how to find the largest number from them.What should I do to find the largest number?If I use if-else then it would be very tedious but I think there is way out with for loop but still I can't frame the logic. Here is the code

Code:
#include<stdio.h>
main() {
int lnum[5][5];
int i,j;
for(i=0;i<=4;i++) {

[Code] .....

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C++ :: Sum Of Diagonals Of Matrix - Program Giving Segmentation Error?

Jan 7, 2015

After entering the values of the matrix, it is giving me segmentation error. also "if possible", correct it

#include<iostream>
using namespace std;
int main()
{

[Code]......

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C++ :: Accept Matrix As Argument And Display Its Multiplication Matrix

Jun 1, 2014

I just want to know the code of the program: Write code to accept matrix as aurgument and display its multiplication matrix which return its multiplication matrix.

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C++ :: Program To Calculate BMI

Oct 7, 2013

I'm trying to successfully run a program that calculates your BMI but, although it runs, it is not giving the the correct math. Instead, it gives me the number i've submitted as my weight as an answer. I'm using Visual Studio 2008 and the formula: weight / (height/100)*2

Here is my code

#include <iostream>
#include <cmath>
using namespace std;
int main() {
int weight;
int height;
double BMI;

[Code] ....

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C++ :: Program To Find Shortest Path Between Vertices Using Matrix Power Multiplications

Feb 24, 2013

given matrix A find shortest path between vertices using matrix power multiplications untill u get nonzero values,use adjacency matrix

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C/C++ :: Sequential Matrix Multiplication Program - Syntax Error Near Unexpected Token

Apr 30, 2014

I wrote a sequential matrix multiplication program in c.

After execution i get error like
./mul.c: line 11: syntax error near unexpected token `('
./mul.c: line 11: `int main(){'

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#define wA (30 * 16)
#define wB (50 * 16)
#define hA (80 * 16)
#define hB wA
#define wC wB

[Code] ....

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C++ :: Program To Calculate Fractions?

Oct 24, 2013

I need to write a program that can calculate fractions.

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C++ :: Program That Calculate Discounts

Nov 8, 2013

So my midterm exam for programming is done. My program didn't run. Tried rewriting it once I got home. I am still getting an error that the program could not be run. Also, we weren't allowed to use the internet. So I didn't know how to calculate for the discounted rate.

I am using Microsoft Visual Studio 2010.

Given problem:

ABC Hotel offers 5-10% discounts depending on how much money has the user spent. If item purchase is lesser than 1000php (1USD is 43.19PHP) 5% discount is availed. Greater than 1000php then 10% discount is availed. Total price and discounted price should be displayed.

#include<iostream>
using namespace std;
main() {
float a,b,c,d,e,f,g,h,i,j,total,discounted_price;
cout<<"Please input price of first 1st item: ";

[Code] .....

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C/C++ :: Assign A Matrix To Submatrix Of A Bigger Matrix?

Feb 27, 2012

I want to assign a matrix to submatrix of a bigger matrix.

ublas::matrix<int> A(8,5);
ublas::matrix<int> B(2,5);
for(size_t i=0;i<A.size1();++i)
for(size_t j=0;j<A.size2();++j)
        A(i,j)=i*A.size2()+j+1;
for(size_t i=0;i<B.size1();++i)
    for(size_t j=0;j<B.size2();++j)
        B(i,j)=i*B.size2()+j+5;
ublas::matrix_range<ublas::matrix<int> > a(A,ublas::range(0,2),ublas::range(0,5));
a=B;  

and it works.

but if the matrix is compressed_matrix type, there's something with it. the error log as below:

Check failed in file boost_1_48_0/boost/numeric/ublas/detail/matrix_assign.hpp at line 1078:
detail::expression_type_check (m, cm)
terminate called after throwing an instance of 'boost::numeric::ublas::external_logic'
what(): external logic
Aborted

I'm not sure this is a bug or not.

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C :: Calculate Offset Of Simple Program

Sep 28, 2013

I would to learn how could i calculate the offset of simple c program?

Lets say that I have that simple program:

Code:
#include <stdio.h>
int main() {
int x=1;
printf("x = %d", x);
return 0;
}

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