mixpp: A very simple tutorial about vectors and matrixes

A very simple tutorial about vectors and matrixes

Let's start with a really simple example. Try to complile the following program:

#include <itpp/itbase.h>
using namespace itpp;
//These lines are needed for use of cout and endl
using std::cout;
using std::endl;
int main() {
    //Declare vectors and matricies:
    vec a, b, c;
    mat A, B;
    //Use the function linspace to define a vector:
    a = linspace ( 1.0, 2.0, 10 );
    //Use a string of values to define a vector:
    b = "0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0";
    //Add two vectors:
    c = a + b;
    //Print results:
    cout << "a = " << a << endl;
    cout << "b = " << b << endl;
    cout << "c = " << c << endl;
    //Use a string to define a matrix:
    A = "1.0 2.0;3.0 4.0";
    //Calculate the inverse of matrix A:
    B = inv ( A );
    //Print results:
    cout << "A = " << A << endl;
    cout << "B = " << B << endl;
    //Exit program:
    return 0;
}

When you run this program, the output shall look like this

a = [1 1.11111 1.22222 1.33333 1.44444 1.55556 1.66667 1.77778 1.88889 2]
b = [0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1]
c = [1.1 1.31111 1.52222 1.73333 1.94444 2.15556 2.36667 2.57778 2.78889 3]
A = [[1 2]
 [3 4]]
B = [[-2 1]
 [1.5 -0.5]]

If this is what you see, then congratulations! You have managed to compile your first it++ program!


Generated on 2 Dec 2013 for mixpp by  doxygen 1.4.7