C++ Armadillo :: Shift














































C++ Armadillo :: Shift



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Description::
This is the basic C++ program of C++ armadillo library which shows how to shift particular element of column of the given matrix by some particular number. It can be carried out by the help of inbuilt function "shift" in armadillo library. "shift" function takes two parametres.First is the input matrix name and second is integer value by which elements needs to be shifted.
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Program::

#include <iostream>
#include <armadillo>
using namespace std;
using namespace arma;

int main()
{
//initialize the random generator
//Create a 5 x 5 random matrix and printing it
mat A = randu<mat>(5,5); //random matrix of size 4x4 (generared by this syntax)
mat B = shift(A, -1); //shifting elements of columns of matrix by some integer mat C = shift(A, +1);
cout << "Matrix A::\n"<<endl;
cout<< A << endl;
cout << "Matrix B(After shifting [-1])::\n" << endl; //displaying cout<< B << endl;
cout << "Matrix C(After shifting [+1])::\n" << endl; //displaying cout<< C << endl;
return 0;
}
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Commands to run program on terminal::
$ g++ filename.cpp -o objectname -O2 -larmadillo

$ ./objectname
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Output::

Matrix A:: 0.7868 0.4049 0.2742 0.8571 0.2393 0.2505 0.2513 0.5610 0.4998 0.3201 0.7107 0.0227 0.1400 0.4194 0.9105 0.9467 0.5206 0.5439 0.7443 0.1648 0.0193 0.3447 0.5219 0.2492 0.2455 Matrix B(After shifting [-1]):: 0.2505 0.2513 0.5610 0.4998 0.3201 0.7107 0.0227 0.1400 0.4194 0.9105 0.9467 0.5206 0.5439 0.7443 0.1648 0.0193 0.3447 0.5219 0.2492 0.2455 0.7868 0.4049 0.2742 0.8571 0.2393 Matrix C(After shifting [+1]):: 0.0193 0.3447 0.5219 0.2492 0.2455 0.7868 0.4049 0.2742 0.8571 0.2393 0.2505 0.2513 0.5610 0.4998 0.3201 0.7107 0.0227 0.1400 0.4194 0.9105 0.9467 0.5206 0.5439 0.7443 0.1648

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