C++ Armadillo :: Sort














































C++ Armadillo :: Sort



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Description::
This is the basic C++ program of C++ armadillo library which shows how to sort particular columns of the given matrix of some particular size. It can be carried out by the help of inbuilt function "sort" in armadillo library. "sort" function takes just one parameter i.e the input matrix name. This function is used to sort the contents of columns of input matrix in ascending order and store it.
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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 = sort(A); //sorting elements of particular columns of matrix A and storing in B
cout << "Matrix A::\n"<<endl;
cout<< A << endl;
cout << "Matrix B(After sorting)::\n" << endl; //displaying cout<< B << 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 sorting)::
0.0193 0.0227 0.1400 0.2492 0.1648 0.2505 0.2513 0.2742 0.4194 0.2393 0.7107 0.3447 0.5219 0.4998 0.2455 0.7868 0.4049 0.5439 0.7443 0.3201 0.9467 0.5206 0.5610 0.8571 0.9105

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