Armadillo with Visual Studio Community 2022 guide

This guide works with Windows 10 (or Server), Visual Studio Community 2022 and Intel® oneAPI Math Kernel Library version 2021.4.0.

1. Visual Studio (VS) Community 2022

Install Visual Studio Community 2022 from https://visualstudio.microsoft.com/.

You only need to choose Desktop development with C++ option.

Now your VS is ready to run.

2. Armadillo CPP library

This library is for matrix operations in CPP.

Download the most recent Armadillo CPP library (armadillo-xx.x.x.tar.xz) from http://arma.sourceforge.net/download.html.

You will need unzip program to open the file (7-zip: https://www.7-zip.org/). Unzip the file to a convenient location.

3. Intel® oneAPI Math Kernel Library (MKL)

Down load the Intel MKL library from https://www.intel.com/content/www/us/en/developer/tools/oneapi/onemkl.html#gs.irg94x.

Once you downloaded, install only Intel oneAPI Math Kernel Library.

4. Create a new project with Armadillo

Create a new project in VS with “Console App” option. Choose a location and name of the project. I gave project name “ArmadilloEx”.

Then your project folder will look like this.

Copy/paste Armadillo files to your project (“armadillo-10.7.4″ folder).

Copy/paste Intel MKL files to your project (“mkl” folder).

Now, your project folder should look like this.

5. Setup VS to use Armadillo

Choose project name (“ArmadilloEx”) in the Solution Explorer window and right click –> Properties –> C/C++ –> General –> Additional Include Directories, and set as below for both Armadillo and MKL.

Choose project name (“ArmadilloEx”) in the Solution Explorer window and right click –> Properties –> Linker –> General –> Additional Library Directories, and set as below.

Choose project name (“ArmadilloEx”) in the Solution Explorer window and right click –> Properties –> Linker –> Input –> Additional Dependencies, and set (type) as below.

You are all set!

6. Run this example at ArmadilloEx.cpp.

#include <iostream>

#include <armadillo>

int main()

{

    std::cout << "Hello   World!\n";

    // Initialize the random   generator

    arma::arma_rng::set_seed_random();

    

    // Create a 4x4 random matrix and   print it on the screen

    arma::Mat<double> A =   arma::randu(4, 4);

    std::cout << "A:\n" << A << "\n";

    // Multiply A with his transpose:

    std::cout << "A   * A.t() =\n";

    std::cout << A * A.t() << "\n";

    // Access/Modify rows and columns   from the array:

    A.row(0) = A.row(1) + A.row(3);

    A.col(3).zeros();

    std::cout << "add   rows 1 and 3, store result in row 0, also fill 4th column with zeros:\n";

    std::cout << "A:\n" << A << "\n";

    

    // Create a new diagonal matrix   using the main diagonal of A:

    arma::Mat<double>B =   arma::diagmat(A);

    std::cout << "B:\n" << B << "\n";

    

    // Save matrices A and B:

    A.save("A_mat.txt",   arma::arma_ascii);

    B.save("B_mat.txt",   arma::arma_ascii);

}