C++ :: How To Print Matrix
Jan 27, 2015I wants to print matrix such that Consider that original matrix look like following
1 2 3
4 5 6
7 8 9
Now I want to print like following
7 8 9
4 5 6
1 2 3
we can use only two for loops.
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C++ :: Importing 2D Array - Print Out Matrix And Manipulate It
Nov 9, 2014Essentially what I need to do is take a text file, ("input.txt"):
4 4
1 0 0 1
1 1 1 1
0 0 1 0
0 0 1 0
And take the first two values on line 1 (4, 4) and use them as length and width.
Number of rows: 4
Number of columns: 4
Then I need to print out the matrix and further manipulate it. I need to find the sum of the 1's per column and then take that number and replace each 1 with the 1's in each column.
So it'll look like this:
2 0 0 2
2 1 3 2
0 0 3 0
0 0 3 0
The part that's mostly troubling me is that my instructor will be giving me the input file with random values, so I don't know what the matrix dimensions will be.
I can read the 2D array but can't seem to use it after. I need to find a way to skip the first line, and then read in the matrix and be able to use it mathematically to add up each column.
C++ :: Program To Print Upper Half Of Matrix
Jan 3, 2015This 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.
C++ :: Create Random Matrix And Print It Out In Text File
Feb 11, 2014I am trying to create a random 3x3 matrix and print it out in a text file using basic functions. My code below will not compile.
#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;
//nxn Matrix = 3x3
const int ROWS = 3;
const int COLS = 3;
[Code] .....
C++ :: Using OOP To Implement Matrix Class That Provide Basic Matrix Operations
Mar 27, 2013i want to know how i can solve this question? do i need to create a class or write the program codes.
View 12 Replies View RelatedC++ :: Accept Matrix As Argument And Display Its Multiplication Matrix
Jun 1, 2014I 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.
View 1 Replies View RelatedC/C++ :: Assign A Matrix To Submatrix Of A Bigger Matrix?
Feb 27, 2012I 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.
C++ :: Find Matrix P For A Square Matrix A
May 25, 2014I have to prepare a project. But I don t know how can I do this. Program will find a matrix P for a square matrix A such that P^-1 A P ....
View 15 Replies View RelatedC++ :: How To Convert Compact Form Of Matrix Into Matrix Form
Oct 4, 20143 3
2 1 3 2 3
1 0 2
1 2 6
First line shows row and column number
First index of the second line tells the number of non-zero entries of the first row and second index tell the column number where the non zero entry is placed
for 1st row of matrix:
non-zero entries=2
column number=1
non-zero entry=3
column number=2
non-zero entry=2
covert this in the given form
0 3 3
2 0 0
0 0 6
C :: Won't Print Numbers Sorted When Use Print Function
Nov 17, 2013I am making a program where the user enters numbers into an array and then a number,x. The array is sorted, then x is inserted into the appropriate place. I wrote my selection sort
Code:
void Sort(int ary[], int size)
{
int temp;
int smallest;
int current;
int move;
}
[code]....
put it wont print the numbers sorted when I use my print function, just the unsorted numbers.
C/C++ :: Using Print Statement To Print Certain Number Of Spaces
Sep 1, 2014is there a to use printf to print certain number of blank spaces, where the number is derived from the output of a function?
for(m=low; m<=high;m++)
{
printf("t=%2d %'f(m)-1's %3c", m, ' ',*);
}
This is suppose to output
t=-3 *
t=-2 *
t=-1
.
.
.
C++ :: Get Matrix Indexes From The Value
Oct 17, 2013I have a 3x3x3 matrix with values hanging from 1 to 27.
The order is this: Code: m[0][0][0] = 1;
m[0][0][1] = 2;
m[0][0][2] = 3;
m[0][1][0] = 4;
m[0][1][1] = 5;
m[0][1][2] = 6;
.
.
.
m[1][0][0] = 10;
m[1][0][1] = 11;
m[1][0][2] = 12;
.
.
.
m[2][2][0] = 25;
m[2][2][1] = 26;
m[2][2][2] = 27;
Is there an easy way to compute the indexes given the value? For example, I know that the first index can be found by dividing the value by 9.0: Code: const int firstIndex = ceil(value / 9.0) - 1; What about the second and the third indexes? I couldn't find a pattern in the numbers, and I didn't want to iterate through the matrix (the indexes will be calculated many times).
The other option is to create arrays where the values will be indexes and the matrix indexes will be the values. I'm not sure if it is the best way though
C :: Getting Error On Matrix
Mar 6, 2015I've a code and it works on my linux laptop; however it doesnt work on a matrix server. Im getting error Code: file.c: In function CondCheck:file.c:40:3: warning: this decimal constant is unsigned only in ISO C90 [enabled by default] The code of the programme
Code:
#include <stdio.h>
#include <string.h>
#include <math.h>
/*DECIMAL TO BINARY CONVERTER*/
int BinaryConverter (int bina)
}
[code]....
C++ :: Inserting A Row Into A Matrix?
May 1, 2013I'm writing a function that inserts a row into a matrix and deletes the last row.
But I'm having trouble. What do I need to add to this function:
C/C++ :: Add Row To Irregular Matrix?
Apr 7, 2013//matrix :
12 5 35 35 35 65 170
48 15 190 85 27 27 24
100 315 119 600 116 129 70
88 110 145 90 90 90 90
77 85 130 55 210 122 200
// the row :
152 152 149 155 170
// matrix after adding the previous row :
12 5 35 35 35 65 170
48 15 190 85 27 27 24
100 315 119 600 116 129 70
88 110 145 90 90 90 90
77 85 130 55 210 122 200
152 152 149 155 170
We use the pointer.
- Can I print out the irregular matrix?
C++ :: Matrix Multiplication Using Pointers
Feb 15, 2014Code:
#include<stdio.h>
#include<conio.h>
void main()
[Code] .....
This program on running returns an error of "ILLEGAL USE OF POINTER".
C++ :: Multiplying Matrix Using Algorithm
Jun 3, 2013Trying to multiply to matrixes using the following algorithm,
Code:
ABrec(A,B)
n=A.rows; //n must be multiple of 2
C is a new n*n matrix.
if(n==1)
C[0][0]=A[0][0]*B[0][0];
[Code] ....
but the code doesn't work !!!
C++ :: Display Matrix Of Multiples Of 4
Feb 25, 2013Write a c++ program to display a matrix of multiples of 4 from 1 upto 30 .....
View 1 Replies View RelatedC :: Adding Two Matrix Using Malloc
Mar 3, 2015This is my code without malloc. I need to change the array size so there is no max size for each matrix. I must dynamically allocate space for all arrays used. So I need to use malloc to create my arrays. So I cant use int A[rows][cols].
Code:
/* This program asks the user for 2 matrices called A and B, as integers, and displays their sum, C. The max dimension of each matrix is 100. */
#include<stdio.h>
// Construct function
void construct()
{
int m, n, i, j;// Variables
int first[100][100], second[100][100], sum[100][100];// Matrices variables
[Code]...
Im having a hard time understanding/using malloc. Should first, second, and sum be single pointers or double? How do I scan the matrix correctly? And how do I add them properly? Do I have to change my for loops?
Code:
/* This program asks the user for 2 matrices called A and B, as integers, and displays their sum, C. The max dimension of each matrix is 100. */
#include <stdio.h>
#include <stdlib.h>
// Construct function
void construct()
[Code]...
C :: Matrix Multiplication Using Pointers
Feb 17, 2014Code:
#include<stdio.h> Code: #include<conio.h>
void main() {
int *a[2][2],*b[2][2],*c[2][2],i,j,k;
Printf("
ENTER a MATRIX ELEMENTS
[Code] .....
C :: Sending Matrix Over UDP Socket
May 18, 2014I want to apply program to send matrix from client and server ,and return back a processed matrix ..
How I can do it using UDP ,it was easy to use tcp for that!?
C :: Array And Matrix Check
Sep 24, 20131. Input an dimension and elements of an array from the keyboard. Count the odd elements of an array and that number join to variable K, then sort the last K elements in decreasing order.
Code:
#include <stdio.h>
main ()
{
int A[100], i, n, j, K = 0;
printf ("Type in the dimension of an array:
");
scanf ("%d", &n);
[Code]....
C :: All Paths Between Two Nodes In Matrix
Jun 9, 2014I have a adjacency matrix. (router adjacency matrix in network). The result should be the router ID.I mean, print all the possible paths from source router to target router(ROUTER id>> 1 - 2 - 3 - 4 so there are four one router). I get the error in the output.)
Code:
#include<stdio.h>
#include<conio.h>
/* graph: Pointer to the starting of mXn matrix
i, j: Current position of the robot (For the first call use 0,0)
m, n: Dimentions of given the matrix
pi: Next index to be filed in path array
[Code] .....
C :: Find Minimum Value In Given Matrix M
Jun 16, 2013The method doesn't work properly, the point of the code is to tell the minimum value in the given matrix "m", it's supposed to take the first value of the matrix store it in min_ and then compare it to every value of the matrix, if the value stored in min_ is bigger than the current value in the loop then it's stored as the new min_ and at the end it's supposed to print that minimum...
Code:
#include <stdio.h>
#include <stdlib.h>
#define SIZE 3
void minimum (int mat[SIZE][SIZE]){
int r,c;
int min_;
printf("
[Code] ......
C++ :: Dynamic Size Of A Matrix
Apr 24, 2013My purpose is to fill a matrix with random numbers. As you can see in the code, I defined a matrix called sim_matrix (which should be filled), but the dimensions of such matrix is given by the parameters that we introduce in the constructor. Because we don't know the size of such matrix until we give these parameters through the constructor. I'd like to know how to declare such matrix, or how to modify the size,...
The header of my file MonteCarlo.h is:
/* MonteCarlo.h */
#ifndef MONTECARLO_H_
#define MONTECARLO_H_
using namespace std;
class MonteCarlo {
public:
MonteCarlo(int n_paths, int n_simulations);
[Code] ......
C++ :: Function Outputs Different Matrix
Jun 25, 2013It is getting more and more annoying, everytime i progress the next hurdle is just bigger. The problem is i want to calculate inverse of a matrix but using .inv gives a matrix full of -1.#QNAN values so i decided to write one my self
a function which returns the inverse matrix but something strange happens.
when i debug through the function code it works well and check the matrix that will be returned and the elements are correct.
when the function is called and output matrix is resulted. the element of the matrix is different.
matrix = inversemat(matrx)
inside function, invmat= 3 1 2, 3 5 1, 8 1 2
outside the function matrix = -9.1249e+61 wtf.
here is the code
int main() {
double matrx[3][3]={{1,2,3},{0,1,4},{5,6,0}};
Mat matrx1(3,3,CV_64F,matrx);
Mat inmat;
inmat=inversemat(matrx1);
[Code] ...
invmat elements are correct, as for inmat the elements are too small -9.212412e+61
What is going on, when the matrix is returned.