C++ Armadillo :: Unique elements of matrix














































C++ Armadillo :: Unique elements of matrix



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Description::
This is the basic C++ program of C++ armadillo library which shows how to get the unique elements of the given matrix of some particular size. It can be carried out by the help of inbuilt function "unique" in armadillo library. "unique" function takes just the one parameter i.e the matrix name. It shows the unique elements of matrix in ascending order.
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Program::

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

int main() {
// without initializing the random generator
//Creating a 2 x 2 random matrix and printing it
mat X;
X << 1 << 3 << endr << -4 << 3 << endr;
mat Y = unique(X);
cout << "Matrix X::\n" << endl; cout << X << endl; cout << "Unique values of matrix ascending order" << endl; cout << Y << 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 X::
1.0000 3.0000 -4.0000 3.0000 Unique values of matrix ascending order -4.0000 1.0000 3.0000

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